Program & Abstracts - Natural History Museum

IPC13

Program&Abstracts

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TableofContents

Section PagesWelcome 2MajorSponsors 3MeetingCodeofConduct 4MeetingVenue 5Restaurants 6GettingtoandfromDowntownLongBeach 7-8PresentationInformation 9OverviewoftheSchedule 10DetailedScheduleofEvents 11-15ListofPosterPresentations 16-22Abstracts:OralPresentations 23-37Abstracts:PosterPresentations 38-58ListofIPC13Participants 59-64Notes 65-68ColleaguesRecentlyLost 69

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WelcomefromIPC13OrganizingCommitteeGreetingsPolychaeteColleagues,OnbehalfoftheOrganizingCommittee,welcometosunnySouthernCalifornia,theRMSQueenMary,andthe13thInternationalPolychaeteConference!WehopethatyourtraveltoLongBeachwaspleasantandthatyouarereadyforfivedaysofenlighteningprogramsandtimespentwithfriendsandcolleagues.In1989,IPC3tookplaceinLongBeach,organizedbyDr.DonaldReish.In2015,DonapproachedustoaskifitmightbepossibletobringIPC13backtoLongBeach,thirtyyearslater.Weagreedtoworktowardsthatgoal,andin2016theparticipantsinIPC12inWalesselectedLongBeachasthevenueforthenextmeeting.Unfortunately,Dondidnotlivetoseehisdreambecomeareality,buthispassionforallfacetsofpolychaetebiologyisrepresentedinthisconferencethroughthebroaddiversityofpresentationsthatareoffered.Weknowthathewouldbeverypleasedandhonoredbyyourparticipationinthismeeting.Theconferencewouldnothavebeenpossiblewithoutyoursupportandparticipation.Inaddition,wewouldliketoexpresssincerethankstothoseorganizationsthathavesupportedtheconference,eitherfinanciallyorbyothercriticalmeans.Amongotherthings,thissupporthasallowedustowaiveregistrationfeesfor12studentparticipantsfromaroundtheglobe(supportfromtheAmericanMicroscopicalSocietyandSCAMIT),tooffersubstantialcashawardsforbeststudentpresentations(supportfromTheBiologicalBulletinandananonymousdonor),andtomaketheproceedingsopenaccessonline(supportfromUSCSeaGrant).Sponsorsinclude: •AmericanMicroscopicalSociety •TheBiologicalBulletin

•CaliforniaStateUniversityatLongBeach •NaturalHistoryMuseumofLosAngelesCounty •OrangeCountySanitationDistrict •SouthernCaliforniaAssociationofMarineInvertebrateTaxonomists(SCAMIT) •USCSeaGrant •WoodEnvironment&InfrastructureInaddition,anumberofindividualshavedonatedtosupporttheconference.Wethankallofyou!With~115attendeesfrom22countriesgivingadiversesetofpresentationsonthebiologyofpolychaetes,wewisheveryoneaproductiveandenjoyablemeeting!

TheIPC13OrganizingCommitteeBrunoPernet(Chair)KirkFitzhughLeslieHarrisLarryLovellChristineWhitcraft

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IPC13Sponsors

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MeetingCodeofConduct

ThisMeetingCodeofConductisintendedtopreventincidentsofharassment,discrimination,andviolence,andtomaintainthehighqualityofscientificdiscoursethatourmembershavecometoexpectfromtheInternationalPolychaetologyAssociation(IPA)anditsmeeting,theInternationalPolychaeteConference.

TheInternationalPolychaetologyAssociation(IPA)isanonprofitinternationalorganizationwhosepurpose,

accordingtotheIPAConstitution,isto“encourageresearchonPolychaetaandstimulateotherstoparticipateandcooperatethroughinformalmeetingsandcorrespondence;toprovideaforumforexchangeofideas;toestablishameansandanopportunityforpersonalcontactandinteractioninaimingforbettermutualunderstanding;toserveasaliaisonbodyamongpolychaetologists;andtointroducenewstudentstotheworkersinthisfield.”TheInternationalPolychaeteConference(IPC)istheregular(everythreeyears)meetingoftheIPA.

IPAiscommittedtocreatinganenvironmentinwhichallattendeescanparticipatewithoutharassment,discrimination,orviolenceofanykind.Allmeetingparticipants,irrespectiveofrace,sexualorientation,genderidentity/expression,ethnicity,ability,religion,language,professionalstatus,orage,mustbetreatedwithrespect.Allmeetingparticipantsincluding,butnotlimitedto,attendees,speakers,volunteers,exhibitors,serviceprovidersandothersareexpectedtoabidebythisIPAMeetingCodeofConduct.ThisCodeofConductappliestoallIPCmeeting-relatedeventsincludingthosesponsoredbyorganizationsotherthanIPAbutheldinconjunctionwithIPCevents,inpublicorprivatefacilities.

Theexpectedbehaviorisasfollows.Allparticipants,attendees,andsuppliers/vendorswill:•Betreatedwithrespectandconsideration,valuingthediversityofviewsandopinions.•Beconsiderate,respectful,andcollaborative.•Communicateopenlywithrespectforothers,critiquingideasratherthanindividuals.•Avoidpersonalattacksdirectedatotherattendees,participants,andsuppliers/vendors.•Bemindfuloftheirsurroundingsandtheirfellowparticipants.•AlertamemberoftheIPCorganizingcommitteeiftheynoticeadangeroussituationorsomeoneindistress.•Respecttherulesandpoliciesofthemeetingvenue,hotels,IPC-contractedfacility,oranyother

venue.

Harassmentofanymeetingparticipant(attendee,speaker,volunteer,exhibitor,staffmember,serviceprovider,organizer,ormeetingguest)willnotbetolerated.Discriminationofanymeetingattendeeonthebasisofrace,sexualorientation,genderorgenderidentity,ethnicity,ability,religion,language,nationalorigin,physicalappearance,oragewillnotbetolerated.Unacceptablebehaviorincludes(butisnotlimitedto):

•Unwantedverbalattention•Unwantedtouching•Intimidation•Stalking•Shaming•Bullying•Harassment(notethatharassmentpresentedinajokingmannerisstillharassmentandconstitutesunacceptablebehavior)•Retaliationforreportingharassment•Reportinganincidentinbadfaith

PeoplewishingtoreportaviolationofthiscodeofconductshouldimmediatelycontactamemberoftheIPCorganizingcommittee.Incidentsofharassmentanddiscriminationwillbetakenextremelyseriously.Confidentialitywillbemaintainedunlessdisclosureislegallyrequired.Themeetingorganizersreservetherighttoenforcethiscodeofconductinanymannerdeemedappropriate.Anyoneviolatingthecodeofconductmaybe:(a)askedtostop,(b)expelledfromthemeeting(withoutrefund),(c)prohibitedfromattendingfuturemeetings,and/or(d)havemembershiprevokedorbannedforthefuture.

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MeetingVenue–TheRMSQueenMaryThemeetingwillbeheldonboardtheRMSQueenMary,a310mlongoceanlinerbuiltin1936andretiredfromservicein1967.Duringthattimeshehadarichhistoryoftrans-AtlanticservicefortheCunardLine,aswellasserviceasatroopshipduringWorldWarII.ShehasbeenpermanentlymooredinLongBeachsince1967,undoubtedlydevelopingadiversecommunityincludingnativeandnon-nativepolychaetesonherhull.Enjoylearningaboutherhistoryfromthemanydisplaysonboardduringtheconference!Exceptforthemid-conferenceexcursion,allIPC13activitieswilltakeplaceonboardtheQueenMary.Asherdecknamingsystemissomewhatnon-intuitive,weprovideasagittalsectionandaguidetosomerelevantlocationsbelow.

Hotelregistration–ADeck(ElevatorLevel3).IPC13registrationwillbesetupinthisareafrom1600-2000onSunday4August.Guestrooms–M,A,andBDecks(ElevatorLevel3).AllguestroomsforIPC13participantsareononeofthesethreedecks.Grand/WindsorSalons–RDeck(ElevatorLevel2).Almostallconferenceactivitieswillhappenintheseadjacentareas:IPC13registrationonMonday5August,talksandposterpresentations,andbreakfastandlunchforalldaysexceptthemid-conferenceexcursionday.VerandahGrill/Deck–SunDeck.ChatwithyourcolleaguesatthewineandcheesesocialontheeveningofMonday5August!Queen’sSalon–PromenadeDeck(ElevatorLevel4).ThisisthesiteofthebanquetontheeveningofFriday9August.ObservationBarandArtDecoLounge–PromenadeDeck(ElevatorLevel4).EachIPC13guestroomisallottedasinglecomplimentarydrinkcouponredeemableattheObservationBarduringtheconference.Diningoptionsonboard–MostarelocatedonthePromenadeDeck(ElevatorLevel4).TheseincludetheMidshipMarketplace(asourceforcoffeeandsnacks),thePromenadeCafé,andtheChelseaChowderHouse&Bar.SirWinston’srestaurant,amoredeluxeoption,islocatedontheSportsDeck.

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RestaurantsThereareseveraldining/drinkingoptionsonboardtheQueenMaryorjustafewstepsaway(FuegoattheHotelMaya,TheReef),butmostareinDowntownLongBeach(DTLB),centeredroughlyattheintersectionofPineAvenueandBroadway(mapbelow).DTLBdiningoptionsareconcentratedinfourareas,allquiteclosetoeachother.Othergooddiningneighborhoodseasilyreachedbypublictransport(buses)orrideshareincludeRetroRowandBelmontShore,bothtotheeastofDTLB.

AfewofthemanyoptionsineachareaRainbowHarbor/ShorelineVillage PineAvenueBubbaGumpShrimpCo. GuRamenChili’sGrillandBar TacoBeachOutbackSteakhouse King’sFishHouseP.F.Chang’s George’sGreekCafeGladstone’s AlegriaCocinaLatinaFamousDave’sBar-B-Que Pier76FishGrillYardHouse RockBottomRestaurant&BrewingParker’sLighthouse EastVillageArtsDistrictThePromenade JamesRepublicBeachwoodBBQ&Brewing ThaiDistrictMichael’sDowntownItalianKitchen DistrictWineTheOrdinarie 555EastAmericanSteakhouseBeerBelly Modica’sDeliAmmatoliMediterraneanBites CrèmedelaCrepeThenearestsupermarket/pharmacyisaVonsat600EBroadway;anothernearbypharmacyistheRiteAidat601PineAvenue.

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GettingtoandfromDowntownLongBeachOnfoot–ThecenterofDTLB(~PineandBroadway)isjustunder2miles(3.2km)fromtheQueenMary;iftheweatherispleasant,youmaywishtosimplywalk.PassportBus(free)–TheredPassportbusdepartsfromtheQueenMaryevery15-30minutes,headedforDTLB,from0630-justaftermidnight.Aquabus($1eachway)–ThiswatertaxidepartsfromadockafewhundredmetersinfrontoftheQueenMary.Seemapandscheduleonthenextpage.Rideshareservices(costvaries)–e.g.,Lyft,Uber,taxis

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PresentationInformationOralpresentationsOralpresentationsareatotalof20minuteslong(includinganytimethepresenterleavesforquestions).Allpresentationsfiles(.ppt,.pptx,or.pdf)shouldbeloadedontothecomputerattheregistrationdeskwellinadvanceofyouroralpresentation,sothattheycanbecheckedduringabreakbeforeyourpresentation.PresentationfilesshouldbebroughtinonUSBflashdrives.Pleasetrytohaveyourfilesloadedontoconferencecomputersbythedaybeforeyourpresentation.Wewouldpreferthatallspeakersusetheconferencecomputerfortheirpresentation,butifnecessaryitwillbepossibletouseyourowncomputer.Audiopatchcableswillbeavailableifneeded.Theprojectionscreenaspectratiowillbe16:9.PosterpresentationsPostersshouldbedesignedsoastooccupyaspacenolargerthan48x48inches(122x122cm).Theycan,ofcourse,besmallerthanthissize.Postersarenumberedinthisprogrambook;spacesonboardswillalsobenumbered,andyourpostershouldbemountedintheappropriatelynumberedspace.Wewillprovidepushpinsformountingpostersonboards.PosterscanbemountedonboardsonMondayafternoonoranytimeduringthedayonTuesday.ThepostersessionisThursdayafternoon1540-1800;authorsshouldstandbytheirpostersduringthistime.PostersshouldbetakendownbymiddayonFriday.SocialmediapolicyWeencourageallconferenceattendeestodiscussIPC13onsocialmedia!YoucanliveTweet,posttoFacebook,orevenblogaboutthepresentations.However,postingofphotographs,video,oraudiorecordingsoforalorposterpresentationsarenotallowedunlessyoureceivepermissionfromthepresenter(s).Somepresenterswillwishtowithholdaudiovisualmaterialfrombeingrecordedorpostedonsocialmedia. @IPC2019 #IPC13 #IPC13Wi-fiAccessIntheGrand/WindsorSalons,connecttothenetworkConventionServices,andusethepasswordIPC2019.

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OverviewoftheScheduleSunday4August(Hotelcheck-inarea) 1600−2000 Registration

Monday5August(Grand/WindsorSalons) 0700−1700 Registration 0730−0850 Breakfast 0850−0910 Welcomeaddress 0910−1030 Systematics&EvolutionI(4talks) 1030−1100 Break 1100−1220 Systematics&EvolutionII(4talks) 1220−1340 Lunch 1340−1500 EcologyI(4talks) 1500−1530 Break 1530−1630 EcologyII(3talks) 1630−1700 RemembranceofDr.DonaldReish 1700−1900 Welcomewine&cheesesocial(VerandahGrill/Deck)

Tuesday6August(Grand/WindsorSalons) 0730−0850 Breakfast 0850−1030 MorphologyI(5talks) 1030−1100 Break 1100−1220 MorphologyII(4talks) 1220−1340 Lunch 1340−1500 Systematics&EvolutionIII(4talks) 1500−1530 Break 1530−1630 Systematics&EvolutionIV(3talks) 1630−1700 HistoryoftheAllanHancockFoundation

Wednesday7August(Optionalmid-conferenceexcursion) 0800 BusdepartsQueenMary,toExpositionPark(meetinfrontofQMat0745) 0930−1200 ExpositionParkRoseGarden,CaliforniaScienceCenter,NaturalHistoryMuseum(onyourown) 1200 MeetatRoseGardenFountain;walktoWallisAnnenbergBuilding 1215−1330 LunchinMusesRoom 1330 WalktoAllanHancockFoundationatUniversityofSouthernCalifornia 1530 BusdepartsExpositionPark,toQueenMary

Thursday,8August(Grand/WindsorSalons) 0730−0850 Breakfast 0850−1030 Development&Regeneration(5talks) 1030−1050 Break 1050−1230 Physiology(5talks) 1230−1340 Lunch 1340−1510 Diversity&BiogeographyI(4talks)

1510−1540 RemembranceofDrs.FredGrassle,EugeneRuff,&AlexanderRzhavsky1540−1800 Postersession

Friday9August(Grand/WindsorSalons) 0730−0910 Breakfast 0910−1030 Diversity&BiogeographyII(4talks) 1030−1100 Break 1100−1220 Diversity&BiogeographyIII(4talks) 1220−1400 Lunch[IPCAdvisoryCouncilMeeting,VictoriaRoom] 1400−1500 IPAbusinessmeeting 1500−1510 Closingremarks 1800−2300 Banquet(Queen’sSalon)

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DETAILEDSCHEDULEOFEVENTS:Monday5AugustAlleventsinGrand/WindsorSalonsunlessotherwisenoted

0730-0850 Breakfast(provided) 0850-0910 WelcomeAddresses

DanielDauer(IPAPresident)&BrunoPernet(LocalOrganizingCommittee) SYSTEMATICS&EVOLUTIONI Chair:KirkFitzhugh0910-0930 PhylogeneticinformationonNereididae(Annelida:Phyllodocida)mitochondrialgenomes:thestatusofNereidinaeand

theuseofmitochondrialgeneordertoestablishgroupsinthesubfamilylevelPauloR.Alves,KennethM.Halanych,&CinthyaS.G.Santos

0930-0950 PhylogenyofTerebelliformia–combiningtranscriptomes,broadsamplingandmorphologyJosefinStiller,VincentRousset,EkinTilic,FredrikPleijel,&GregRouse

0950-1010 OnthecomplexdiversityofEurythoe(Amphinomida:Amphinomidae)ElizabethBorda,BeatrizYanezRivera,RomuloBarros,MirandiaJohnson,AndresArias,JerryKudenov,PaoloPaiva,AnjaSchulze,&GregRouse

1010-1030 PhylogeneticinferenceandthemisplacedpremiseofsubstitutionratesKirkFitzhugh

1030-1100 BreakSYSTEMATICS&EVOLUTIONII Chair:EkinTilic1100-1120 Atargetedexon-capturephylogenomicapproachtoinvestigatetheevolutionoffunctionaltraitsinChaetopteridae

(Annelida)JennaM.Moore&KarenJ.Osborn

1120-1140 PhylogenyofLumbrineridae(Annelida):afirstmolecularapproachPolinaBorisova&NataliyaBudaeva

1140-1200 NewinsightsintotheevolutionoftheCharlieChaplinworms(Histriobdellidae)ConradHelm,KatrineWorsaae,IrmaVila,&NataliyaBudaeva

1200-1220 Phylogenyandlife-historyevolutionofSabellidae(Annelida)EkinTilic,ErfanSayyari,JosefinStiller,SiavashMirarab,&GregRouse

1220-1340 Lunch(provided) ECOLOGYI Chair:SaraLindsay1340-1400 Burrowdimensionsandnetworkpropertiesinheterogeneoushabitats

RachelHale,CamillaCassidy,SharifAhmed,ErnestoEstrada,JasminA.Godbold,&MartinSolan1400-1420 Nuchalorgansandnavigation:assessingpolychaeteresponsestosubsurfacechemicalcues

SaraLindsay&KatelynHunt1420-1440 HypomyzostomajasoniSummersandRouse2014(Myzostomida,Myzostomatidae):behavioralpatternsandcolorationin

wormsofdifferentagesGlafiraKolbasova,TatianaNeretina,&ElenaMekhova

1440-1500 PalatabilityanddefensivestrategiesinpolychaetesMarinaCyrinoLealCoutinho,ValériaLaneuvilleTeixeira,&CinthyaSimoneGomesSantos

1500-1530 Break ECOLOGYII Chair:AnjaSchulze1530-1550 AnewperspectiveonaggregationandaggregativesettlementofSpirobranchuscariniferus(Gray1843)(Serpulida)

RobertPaulWolf1550-1610 Whatlimitsthedistributionofthenon-nativeserpulidFicopomatusenigmaticusinCalifornia?

AlisonK.Yee,JessicaPeria,&BrunoPernet1600-1630 Sexonthereef:swarmingpolychaetesofTimor-Leste

AnjaSchulze,JoanaZanol,&ChristopherJ.Glasby 1630-1700 RemembranceofDr.DonaldReish

Dr.KenSchiff 1700-1900 WelcomeWine&CheeseSocial(VerandahGrill/Deck)

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DETAILEDSCHEDULEOFEVENTS:Tuesday6AugustAlleventsinGrand/WindsorSalonsunlessotherwisenoted

0730-0850 Breakfast(provided) MORPHOLOGYI Chair:KatrineWorsaae0850-0910 Transitionofmetanephridialsystemsintoprotonephridialsystemsinspecieswithreducedcoelomandbloodvascular

systemGünterPurschke,JulianEscher,&LeonardBreitsprecher

0910-0930 TheevolutionofthecentralnervoussysteminAnnelidaPatrickBeckers&ConradHelm

0930-0950 Thebroadestdistribution,thetiniestmales,thesmallestgenome–goingforarecord,Dinos?K.Worsaae,A.Kerbl,B.C.Gonzalez,F.Marlétaz,A.Hejnol,&J.M.MartinDuran

0950-1010 One(nerve)ringtorulethemall–structure-functionrelationshipsinthecopulatoryorganofDinophilusgyrociliatusdwarfmales(Dinophilidae)AlexandraKerbl,RézaShahidi,GáspárJékely,&KatrineWorsaae

1010-1030 IntegrativeanatomicalstudyofRamisyllismulticaudatusrevealstheevolutionaryoriginsofitsnovelbodyplanGuillermoPonzSegrelles,ChristopherJ.Glasby,ConradHelm,PatrickBeckers,JörgU.Hammel,RannyeleP.Ribeiro,ChristianFischer,ChristophBleidorn,&M.TeresaAguado

1030-1100 BreakMORPHOLOGYII Chair:MariaDean1100-1120 Histriobdellahomari(Beneden1858),Histriobdellidae:finestructureofventralpharynxandjaws

AlexanderTzetlin,NataliyaBudaeva,ElenaVortsepneva,&ConradHelm1120-1140 Whytoburytheheadinthesand?ThefunctionalmorphologyofSternaspisscutata(Sternaspidae)

J.Müller,S.Seeck,&T.Bartolomaeus1140-1200 Tubearchitectureofsand-castlesabellariidwormsfromtheMediterraneanSea

RossanaSanfilippo,AdrianoGuido,AgatinoReitano,GianniInsacco,&AntoniettaRosso

1200-1220 AstudyofPectinariagouldiiandPhragmatopomalapidosabiocementproteinsMariaA.Dean

1220-1340 Lunch(provided) SYSTEMATICS&EVOLUTIONIII Chair:PatHutchings1340-1400 Who'sthatguy?Whathappenswhenwormsusesomeoneelse’sname?

PatHutchings&NicolasLavesque

1400-1420 Newscaleworms(Polynoidae,Annelida)fromseeps,ventsandwhalefalls,withatributetothecontributionsofMarianPettiboneGregRouse,AveryHiley,SigridKatz,&JohannaLindgren

1420-1440 ComplexitieswithinMacellicephalinae(Polynoidae,Annelida)BrettC.Gonzalez,KatrineWorsaae,&KarenOsborn

1440-1500 Molecularandmorphologicalplacementofanenigmaticdeep-seataxon(Chrysopetalidae:Annelida)instigatesdeeperinvestigationintochrysopetalidplesiomorphicnotochaetalformsCharlotteWatson,EkinTilic,&GregRouse

1500-1530 Break SYSTEMATICS&EVOLUTIONIV Chair:CarolSimon1530-1550 MolecularandmorphometricanalysesrevealhighlyunderestimateddiversityinEteone(Phyllodocidae,Annelida)

MarthaWilliamsEverett,NataliyaBudaeva,GlafiraKolbasova,&TatyanaNeretina1550-1610 EstablishingtaxonomicresearchprioritiesforpolychaetesinsouthernAfrica

CarolSimon,JyothiKara,DylanClarke,&SafiyyaSedick1610-1630 ResolvingtheidentitiesoftwocosmopolitanPlatynereisKinberg,1865speciesinSouthAfrica

JyothiKara,AngusH.H.Macdonald,KerrySink,&CarolA.Simon

1630-1700 HistoryoftheAllanHancockFoundation

LeslieHarris

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DETAILEDSCHEDULEOFEVENTS:Wednesday7AugustNomealswillbeprovidedtoday,exceptforlunchforthoseparticipatinginthemid-conferenceexcursion.Mid-conferenceexcursion(optional)Becauseoflimitedbuscapacityandbecausethelunchorderhadtobefinalizedpriortotheconference,onlythosewhohavepreregisteredforthemid-conferenceexcursioncantakepartinit.Forquestionsaboutthemid-conferencetour,seeKirkFitzhugh. 0800 BusdepartsQueenMary,toExpositionPark(meetinfrontofQMat0745) 0930−1200 ExpositionParkRoseGarden,CaliforniaScienceCenter, NaturalHistoryMuseum(seemap)(onyourown) 1200 MeetatRoseGardenFountain;walktoWallisAnnenbergBuilding 1215−1330 LunchinMusesRoom 1330 WalktoAllanHancockFoundationatUniversityofSouthernCalifornia 1530 BusdepartsExpositionPark,toQueenMaryAlternativeactivitiesForthosewhodidnotpreregisterforthemid-conferenceexcursion,thereareplentyofactivitiesyoumightenjoyinandaroundLongBeach!Belowareafewsuggestions.Feelfreetoaskanyofthelocalorganizersforadviceaboutanyofthose,oraboutanyotheractivitiesyoumightbeinterestedinforthemid-conferenceday.Visitamuseumoraquarium!Threemuseumsarelocatedwithin~3milesoftheQueenMary.TheMuseumofLatinAmericanArtislarge,buttheothertwoarequitesmall.TheAquariumofthePacificisjustover1milefromtheQueenMary.

MuseumofLatinAmericanArt,molaa.orgLongBeachMuseumofArt,lbma.orgPacificIslandEthnicArtMuseum,pieam.orgAquariumofthePacific,aquariumofpacific.org

TourLongBeachbreweries!LikemostlargesouthernCaliforniacities,LongBeachhasanexcellentcraftbrewingscene.Afewparticularlynotablebreweries/pubs,eachwiththeirownspecialities,are:

BallastPointBrewingLongBeach,www.ballastpoint.com/location/ballast-point-long-beach/LongBeachBeerLab,lbbeer.comBeachwoodBlendery,beachwoodbrewing.com/blendery.htmlBeachwoodBrewingandBBQ,beachwoodbrewing.com/menu_lb_classics.html

Bike,run,orwalkontheShorelineBeachPathThispathrunsfromdowntownLongBeach~6mileseasttothemouthofAlamitosBay.IfoneleavesthepathnearitseasternendonecanvisittheBelmontShoresneighborhood(on2ndStreet),whichisfullofrestaurantsandshops.Withabitmoredistance(~2miles)onecanreachthecharmingbeachtownofSealBeach.Kayakorstand-uppaddleboardinAlamitosBay!Youcanrentkayaksorstand-uppaddleboardsinexpensivelyatKayaksOntheWater,locatedabout5mileseastoftheQueenMary.ThatisapleasantwalkontheShorelineBeachPath,oritcanbereachedbycitybus,electricscooter,rideshareservice,ortaxi.AlamitosBayisaveryprotectedbay.www.kayakrentals.netTakeadaytriptoCatalinaIsland!YouwouldwanttoreserveaplaceontheCatalinaExpressaheadoftime.BoatsleavefromdowntownLongBeach(toAvalon)severaltimesinthemorning,startingat0600,andreturnevery~1.5-2hoursintheafternoon.www.catalinaexpress.com

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DETAILEDSCHEDULEOFEVENTS:Thursday8AugustAlleventsinGrand/WindsorSalonsunlessotherwisenoted

0730-0850 Breakfast(provided) DEVELOPMENTANDREGENERATION Chair:GlenysGibson0850-0910 LarvaldevelopmentofPseudopolydorapaucibranchiata(Spionidae,Annelida)fromFlorida

ViktoriaE.Bogantes,KennethM.Halanych,&MichaelJ.Boyle0910-0930 Epigenetics,methionineanddevelopmentalplasticityinthespionidPolydoracornuta

GinaMacDonald,MarleneSnyder,&GlenysGibson0930-0950 UncoveringthehiddendynamicsinthedevelopmentofciliarybandsinPlatynereisdumerilii

SabrinaKuhl,JörnvonDöhren,&ThomasBartolomaeus0950-1010 Genomeeditingsheds‘light’onlarvalswimmingbehavior

ElaineC.Seaver1010-1030 Makingheadsandtailsofsyllids:asummaryoftheirregenerativeabilities

RannyelePassosRibeiro,BernhardEgger,GuillermoPonz-Segrelles,ConradHelm,ChristophBleidorn,&M.TeresaAguado1030-1050 BreakPHYSIOLOGY Chair:KenHalanych1050-1110 TheroleoftemperatureandphotoperiodinregulatingoocytegrowthofthepolychaeteHedistediversicolor

HaiqingWang,AndreasHagemann,MarianneUhre,ArneMalzahn,AleksanderHandå,&KjellIngeReitan1110-1130 YouCANhavefirewithoutoxygen!Howthebeardedfireworm,Hermodicecarunculata,reactstohypoxicconditions

CandaceGrimes,LenePetersen,&AnjaSchulze1130-1150 TheeuryhalineAlittasuccinea(Annelida;Nereididae)expressesaquaporinwaterchannels

SerenaMucciolo,CarmelaGissi,MarikaSalonna,VivianeProdocimo,CarolinaArrudadeOliveiraFreire,MaikonDiDomenico,MariaMastrodonato,FrancescoMastrototaro,PauloDaCunhaLana,&GiuseppeCalamita

1150-1210 Thegenomeofdeep-seaseep-dwellingLamellibrachialuymesi(Siboglinidae)andcluesonchemosyntheticsymbiosisYuanningLi,MichaelG.Tassia,DamienS.Waits,ViktoriaE.Bogantes,KyleT.David,&KennethM.Halanych

1210-1230 SwimmingofthemidwaterpolychaeteTomopterisJoostDaniels,KarenOsborn,NadègeAoki,JoshHavassy,NataliaMushegian,andKakaniKatija

1230-1340 Lunch(provided) DIVERSITY&BIOGEOGRAPHYI Chair:DanielDauer1340-1400 PopulationgeneticsoftwoJapanesemaldanidspeciesbasedonmitochondrialDNAandnuclearsinglenucleotide

polymorphismsGenkiKobayashi,HajimeItoh,YoshihiroTsunamoto,ChikaMitsuyuki,AyumiMatsuo,YoshihisaSuyama,WakaSato-Okoshi,HirokazuAbe,KimiakiNaiki,&ShigeakiKojima

1400-1420 Detectionoftheexoticshell-boringspeciesPolydoraonagawaensisonshellfishfarmsinthenortheasternUnitedStatesPaulRawson,SamanthaSilverbrand,&SaraLindsay

1420-1440 Therecentspreadofthenon-indigenousspecies,Hermunduraamericana(Polychaete:Pilargidae)throughouttheChesapeakeBayDanielDauer,AnthonyJ.Rodi,RobertoJ.Llansã,&SuzanneArcuri

1440-1510 Inlivingcolor:underwatervideographyofannelidsNannetteVanAntwerp

1510-1540 RemembrancesofDrs.FrederickGrassle,EugeneRuff,andAlexanderRzhavsky

JamesBlake&ElenaKupriyanova 1540-1800 Postersession

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DETAILEDSCHEDULEOFEVENTS:Friday9AugustAlleventsinGrand/WindsorSalonsunlessotherwisenoted

0730-0910 Breakfast(provided) DIVERSITY&BIOGEOGRAPHYII Chair:TorkildBakken0910-0930 BiogeographyanddiversityofFalklandIslandsPolychaeta

TeresaDarbyshire0930-0950 ThepolychaeteassemblagepatternintheseagrasshabitatofSouthAndamanIslands,India

RajKiranLakra,JawedEqubal,MuthulingamSavurirajan,KunalSatyam,&ThiruchitrambalamGanesh0950-1010 Wormsfromtheabyss:anneliddiversityandspeciesdistributionfromAustralia’seasternlowerbathyalandabyssal

environmentsLaetitiaGunton,ElenaKupriyanova,TomAlvestad,NataliyaBudaeva,IngoBurghardt,MagdalenaGeorgieva,PatHutchings,Jon.Konsgrud,AnnaMurray,HannelorePaxton,RobinWilson,&JinghuaiZhang

1010-1030 Newinsightsindiversityofdeep-seaserpulidpolychaetesElenaKupriyanova,IngoBurghardt,&GregRouse

1030-1100 BreakDIVERSITY&BIOGEOGRAPHYIII Chair:ElenaKupriyanova1100-1120 PolychaetesassociatedwiththebryozoanBugulaneritinainmarinasoftheIberianPeninsulaandnorthernMorocco

AlejandroFernández-Romero,JuanMoreiradaRocha,&JoséManualGuerra-García1120-1140 PolychaetesinhabitingmassivespongesfromshallowandmesophotichabitatsalongtheIsraeliMediterraneancoast

LironGoren&MichaIlan

1140-1200 IntegratingDNAbarcodingwithtraditionalmorphology-basedtaxonomy:assessmentofspeciesdiversityinmarinebristleworms(Annelida)TorkildBakken,JonAKongsrud,EivindOug,TomAlvestad,ArneNygren,KatrineKongshavn,NataliyaBudaeva,MariaCapa,ThomasDahlgren,&EndreWillassen

1200-1220 Crypticdiversityandgeneticconnectivityinthedeep-seaannelidsacrosstheGreenland-Iceland-ScotlandRidgeNataliyaBudaeva,MariaCapa,ArneNygren,TomAlvestad,KarinMeißner,MiriamGötting,LuisFelipe,MartellHernández,TorkildBakken,EivindOug,&JonKongsrud

1220-1400 Lunch(provided)[IPCAdvisoryCouncilMeeting,VictoriaRoom] 1400-1500 IPABusinessMeeting1500-1510 Closingremarks1800-2300 Banquetanddancing(Queen’sSalon)

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ListofPosterPresentationsPresentationsarelistedalphabeticallybypresenterlastname.1)Molecularevidencefortheexistanceofcrypticspecieswithinthepolychaetewormsknownas‘Iwa-mushi’inJapan(Annelida:Eunicidae:Marphysa)HirokazuAbe1,MasaatsuTanaka2,MasanoriTaru3,SatoshiAbe3,&AtsukoNishigaki31IwateMedicalUniversity;2KagoshimaUniversity;3TohoUniversity2)Anovelsymbioticrelationshipbetweenascidiansandanundescribedtunicboringpolychaete(Annelida:Spionidae:Polydora)HirokazuAbe1,KazuyukiYamada2,OsamuHoshino3,TetsuyaOgino4,ShunKawaida5,&WakaSato-Okoshi61IwateMedicalUniversity;2Freelancebenthicworker;3DivingServiceChap;4KyotoUniversity;5ShimaneUniversity;6TohokuUniversity3)TemporalfunctionalchangesinpolychaetesfromthenorthwesterncoastofBajaCalifornia,MexicoA.Alvarez-Aguilar1,L.V.Rodríguez-Villanueva2,J.V.Macías-Zamora1,N.Ramírez-Álvarez1,&F.A.Hernández-Gúzman11FacultaddeCienciasMarinas,InstitutodeInvestigacionesOceanológicas,UniversidadAutónomadeBajaCalifornia;2MarineBiologyLaboratory,PublicUtilitiesDepartmentCityofSanDiegoOceanMonitoringProgram4)SpatialdistributionofCirratulidaeanditsrelationshipwithenvironmentalvariablesonthewestcoastofTijuana-Ensenada,BajaCaliforniaMexicoA.Alvarez-Aguilar1,L.V.Rodríguez-Villanueva2,J.V.Macías-Zamora1,N.Ramírez-Álvarez1,&F.A.Hernández-Gúzman11FacultaddeCienciasMarinas,InstitutodeInvestigacionesOceanológicas,UniversidadAutónomadeBajaCalifornia;2MarineBiologyLaboratory,PublicUtilitiesDepartmentCityofSanDiegoOceanMonitoringProgram5)Ampharetidae(Annelida)fromdeepNordicSeasTomAlvestad,NataliyaBudaeva,KatrineKongshavn,&JonAndersKongsrudUniversityMuseumofBergen

BiodiversityofpolychaetousannelidsinBahíadeTodosSantos,BajaCalifornia,México.6)OsmarAraujo-Leyva1,VerónicaRodríguez-Villanueva2,&VinicioMacíasZamora11InstitutodeInvestigacionesOcenológicas,UniversidadAutónomadeBajaCalifornia;2MarineBiologyLaboratory,CityofSanDiegoPublicUtilities

Livinginanalga:apreliminarycomparisonoforganismsassociatedwithshallow-waterredalgaefromAntarcticaand7)theMediterraneanJúliaSardà-Avila1,RafaelSardà2,&ConxitaAvila11UniversityofBarcelona;2CEAB-CSIC

Livinginasponge:apreliminarystudyofthefaunaassociatedwiththeAntarcticspongeKirkpatrickiavariolosa8)ConxitaAvila1,EduardGiralt1,JoãoGil2,RafaelSardà3,CarlosAngulo-Preckler11UniversityofBarcelona;2CCMAR;3CEAB-CSIC

MolecularstudyofChaetozone(Annelida,Cirratulidae)revealshiddendiversityincommonbenthicpolychaetes9)MaëlGrosse1,MariaCapa1,2,JonA.Kongsrud3,ArneNygren4,&TorkildBakken11NorwegianUniversityofScienceandTechnology,NTNUUniversityMuseum;2UniversityoftheBalearicIsland,DepartmentofBiology;3DepartmentofNaturalHistory,UniversityMuseumofBergen;4DepartmentofMarineSciences,UniversityofGothenburg10)AnewdeepseaspeciesofChloeia(Annelida:Amphinomidae)fromapockmarkfieldofsouthwesternAtlanticRômuloBarroso1,JerryD.Kudenov2,VictorSeixas3,OrlemirCarrerette4,MauricioShimabukuro4,PauloSumida4,&PauloPaiva31UniversidadeFederalRuraldoRiodeJaneiro;2UniversityofAlaskaAnchorage;3UniversidadeFederaldoRiodeJaneiro;4InstitutoOceanográficodaUniversidadedeSãoPaulo

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AnewspeciesofAtherospio(Polychaeta,Spionidae)fromadeep-watercontinentalslopesiteoffTurkeyintheeastern11)MediterraneanSeaJamesA.Blake1&PatriciaA.Ramey-Balci21AquaticResearch&Consulting;2KoçUniversity

Meiodorvillea(Dorvilleidae)newtotaxonomicandphyllogeneticperspectives12)RafaeldeO.Bonaldo,TatianaM.Steiner,AndréR.S.Garraffoni,&AntoniaC.Z.AmaralInstitutodeBiologia,UniversidadeEstadualdeCampinas

PhylogeographyofAglaophamusmalmgreni(Nephtyidae)intheArcticandnortheasternAtlantic13)PolinaBorisova1,NataliyaBudaeva2,&TomAlvestad21P.P.ShirshovInstituteofOceanology,RussianAcademyofSciences;2DepartmentofNaturalHistory,UniversityMuseumofBergen,UniversityofBergen14)SpeciesdelineationofSabellastarte(Sabellidae:Polychaeta)aroundtheArabianPenensulausingmorphometricsandDNAbarcodingShannonD.Brown1,KatherineRowe1,LauraGajdzik1,JohnA.Burt2,AlyssaMarshell3,GustavPaulay4,&MichaelL.Berumen11KingAbdullahUniversityofScienceandTechnology;2NewYorkUniversityAbuDhabi;3SultanQaboosUniversity;4UniversityofFlorida,FloridaNaturalHistoryMuseum15)NaturalradioledamageandregenerationofthefeatherdusterwormSchizobranchiainsignisShannonD.Brown1,2&RichardB.Emlet11OregonInstituteofMarineBiology;2KingAbdullahUniversityofScienceandTechnology16)ContributionstotheknowledgeoflittoralpolychaeteannelidsfromTunisiaMarwaChaibi1,DanielMartin2,&AtfAzzouna11UniversitédeTunisElManar;2Centred’EstudisAvançatsdeBlanes(CEAB-CSIC)

CumulativeimpactsofhypoxiaandtrawlingonNortheastPacificbenthos17)AlessiaC.Ciraolo&PaulV.R.SnelgroveDepartmentofOceanSciences,MemorialUniversityofNewfoundland18)Myxicolainfundibulum(Montagu,1808)intheUK–Morethanonespecies?TeresaDarbyshireAmgueddfaCymru-NationalMuseumWales19)RedescriptionofNereis(Neanthes)micrommaHarper,1979(Polychaeta:Nereididae)basedontypematerialandadditionalmaterialfromTampaBay,Florida,USA,withadiscussionoftheontogeneticchangesinparapodialmorphologyandinclusioninthegenusNeanthesKinberg,1865enniferS.Davenport1&ChristopherJ.Glasby2J1WoodEnvironment&InfrastructureSolutions,Inc;2TheMuseumandArtGalleryoftheNorthernTerritory20) DNAbarcodingofpolychaetescollectedduringthe2018RapidAssessmentSurveyofMarineSpeciesatNewEnglandfloatingdocks.AndrewDavid&MichaelKrickBiologyDepartment,ClarksonUniversity21)ThestructurecharacterizationofbiocementproteinsfromPhragmatopomalapidosaMariaA.Dean,KrisCurtis,&JakeVanOortCoeCollege22)SyllidsfromBrazil–aLilliputianperspectiveMarceloV.Fukuda1,MaikondiDomenico2,&RômuloBarroso3¹MuseudeZoologia,UniversidadedeSãoPaulo;2CentrodeEstudosdoMar,UniversidadeFederaldoParaná;3InstitutodeBiologia,UniversidadeFederalRuraldoRiodeJaneiro

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23)Exogoninae(Annelida;Syllidae)fromSouthwesternAtlanticoceanicislands:FournewspeciesandnewrecordsRodolfoL.Nascimento¹,²,MarceloV.Fukuda³,&PauloC.Paiva¹,²¹LaboratóriodePolychaeta,DepartamentodeZoologia,InstitutodeBiologia,UniversidadeFederaldoRiodeJaneiro;²ProgramadePós-graduaçãoemBiodiversidadeeBiologiaEvolutiva,InstitutodeBiologia,UniversidadeFederaldoRiodeJaneiro;³MuseudeZoologia,UniversidadedeSãoPaulo24)Levelsofinfestationbyanundescribedpolychaete(Polydora:Spionidae)inpopulationsoftheclamNodipectensubnodosusinOjodeLiebreLagoon,BajaCaliforniaSur,MexicoLauraGonzález-Ortiz1,PabloHernández-Alcántara2,&VerónicaRodríguez-Villanueva31UniversidadAutónomadeNuevoLeón,FacultaddeCienciasBiológicas;2UnidadAcadémicadeEcologíayBiodiversidadAcuática,InstitutodeCienciasdelMaryLimnología,UniversidadNacionalAutónomadeMéxico;3FacultaddeCienciasMarinas,InstitutodeInvestigacionesOceanológicas,UniversidadAutónomadeBajaCalifornia

25)Firstreportofthenon-nativefreshwaternereididpolychaeteNamalycastishawaiiensis(Johnson,1903)inafreshwaterspringinIsrael,andpossiblerouteofintroductionLironGoren1,2&YaronHershkowitz21SchoolofZoology,TelAvivUniversity;2Israel’sAquaticEcologyCenter,SteinhardtMuseumofNaturalHistory,TelAvivUniversity26)Diversityofsponge-associatedpolychaetesacrosstheMediterraneanSeaLironGoren1,2&MichaIlan11SchoolofZoology,TelAvivUniversity;2SteinhardtMuseumofNaturalHistory,TelAvivUniversity27) InvestigatingthearrivalofanalienLeonnates(Annelida:Nereididae)inNewZealandFionaGower1,GeoffreyBRead2,BarryGreenfield2,&JosephMarlow11CawthornInstitute;2NIWA

SmallmorphologicaldifferenceshelptodiscerncrypticspeciesofsouthernCaliforniaorbiniids28)BrentHagginLosAngelesCountySanitationDistricts29)RoleofspatialandtemporalheterogeneityinmoderatingtemperateshelfseacarbonandmacronutrientstocksRachelHale1,2,KarenTait3,JasminA.Godbold2,4,&MartinSolan21NationalInstituteofWaterandAtmosphericResearch;2OceanandEarthScience,NationalOceanographyCentreSouthampton;3PlymouthMarineLaboratory;4BiologicalSciences,UniversityofSouthampton30)SheddinglightonannelidbioluminescenceMaryColleenHannon1,AndersonGarbugliodeOliveira2,&AnjaSchulze11TexasA&MUniversity,Galveston;2UniversityofSãoPaulo31) Adaptativeconvergenciesledtosimilarmorphologiesinplanktonicannelidstages MariaTeresaAguadoMolina1,GuillermoPonz2,&ConradHelm11Georg-AugustUniversityGoettingen;2UniversidadAutónomadeMadrid32)Co-occuringtwoundescribedspeciesofthegenusStygpcapitella(Parergodrilidae)NatsumiHookabe1,NaotoJimi2,ShintaFujimoto3,&HiroshiKajihara11GraduateSchool/FacultyofScience,HokkaidoUniversity;2BioscienceGroup,NationalInstituteofPolarResearch;3ResearchCenterforMarineBiology,GraduateSchoolofLifeSciences,TohokuUniversity33)SpiculesinanundescribedspeciesofThoracophelia(Opheliidae)NaotoJimi1,ShintaFujimoto2,&SatoshiImura11BioscienceGroup,NationalInstituteofPolarResearch;2ResearchCenterforMarineBiology,GraduateSchoolofLifeSciences,TohokuUniversity

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34)AnundescribedspeciesofinterstitialacrocirridMacrochaeta(Acrocirridae)NaotoJimi1,ShintaFujimoto2,&SatoshiImura11BioscienceGroup,NationalInstituteofPolarResearch;2ResearchCenterforMarineBiology,GraduateSchoolofLifeSciences,TohokuUniversity35) Historicalphylogeographyandcrypticevolutionofthree(pseudo)crypticnereididpolychaetesfromSouthAfricaJyothiKara1,AngusH.H.Macdonald2,KerrySink3,&CarolA.Simon11DepartmentofBotanyandZoology,StellenboschUniversity;2SchoolofLifeSciences,UniversityofKwaZulu-Natal;3SouthAfricanNationalBiodiversityInstitute36) PhylogeographyofJapanesearenicolidsGenkiKobayashi1,NaotoJimi2,&ShigeakiKojima31KyotoUniversity;2NationalInstituteofPolarResearch;3TheUniversityofTokyo37)RedescriptonofthreelesserknowngeneraandspeciesofArchinominaeKudenov,1991(Annelida:Amphinomidae)JerryD.Kudenov1&ElizabethBorda21UniversityofAlaskaAnchorage;2TexasA&MUniversity,SanAntonio38)AnewspeciesoftheSpirobranchuskraussiicomplex(Annelida,Serpulidae)fromthePersianGulfandGulfofOmanSamanehPazoki1,HassanRahimian1,TorstenH.Struck2,AhmadR.Katouzian1,&ElenaKupriyanova31DepartmentofAnimalBiology,FacultyofBiology,SchoolofBiologyandCentreofExcellenceinPhylogenyofLivingOrganisms,CollegeofSciences,UniversityofTehran;2NaturalHistoryMuseum,UniversityofOslo;3AustralianMuseumResearchInstitute,AustralianMuseum39) Host-specificityincorals-associatedChristmastreewormsofthegenusSpirobranchusBlainville,1818(Serpulidae,Annelida).ElenaKupriyanova1,MariaJ.Schreider2,JohathanKool2,RichardYu2,&WilliamLeggat21AustralianMuseumResearchInstitute,AustralianMuseum;2SchoolofEnvironmentalandLifeSciences,UniversityofNewcastle40) FunctionalredundancyinpolychaeteassemblagesfromatropicalLargeMarineEcosystem(LME)PaulodaCunhaLana&BarbaraCarolinaGarciaGimenezBenthosLab,CenterforMarineStudies,FederalUniversityofParaná41) RevisionofThelepodidaeandTelothelepodidae(Polychaeta)fromFrenchwatersNicolasLavesque1,PatHutchings2,&MarioH.Londoño-Mesa31CNRS,UniversityofBordeaux;2AustralianMuseum;3UniversidaddeAntioquia42) Firstrecordsandnorthernmostdistributionoftwospionidspecies(NEAtlantic,BayofBiscay)NicolasLavesque1,JérômeJourde2,SuzieHumbert1,BastienLamarque1,Pierre-GuySauriau2,&KarinMeißner31CNRS,UniversityofBordeaux;2UniversityofLaRochelle;3ForschungsinstitutSenckenberg,DZMB43) AnewPoecilochaetus(Annelida:Poecilochaetidae)fromRodrigues,southwestIndianOcean,aredescriptionofP.serpenshoniaraeGibbs,1971,andaphylogenyofthefamilyAndrewS.Y.Mackie1&CinthyaS.G.Santos21AmgueddfaCymru,NationalMuseumWales;2UniversidadeFederalFluminense44) UsingAutonomousReefMonitoringStructures(ARMS)andDNAbarcodingtoassesspolychaetediversityonPacificcoralreefsD.McHugh1&M.Timmers21DepartmentofBiology,ColgateUniversity;2NationalOceanicandAtmosphericAdministration-CREP/UniversityofHawaii-JIMAR45)Revisionofthe“Marphysasanguinea”speciescomplex(Annelida:Eunicidae)IsabelC.Molina-AcevedoEstructurayFuncióndelBentos,Depto.SistemáticayEcologíaAcuática,ElColegiodelaFronteraSur

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46)MorphologicalstudiesofsomecloselyrelatedgeneraofMarphysaDeQuatrefages,1865(Annelida:Eunicidae)IsabelC.Molina-AcevedoEstructurayFuncióndelBentos,Depto.SistemáticayEcologíaAcuática,ElColegiodelaFronteraSur47)TheMagelonidaeofWestAfricaKateMortimer1,JonAndersKongsrud2,&EndreWillassen21AmgueddfaCymru,NationalMuseumWales;2DepartmentofNaturalHistory,UniversityMuseumofBergen48)Newidentificationtoolsforscaleworms(Annelida:Aphroditiformia)RobinWilson1,MarkNikolic1,AnnaMurray2,&KristianFauchald†1MuseumsVictoria;2AustralianMuseum49)OnanewspeciesofPolycirrus(Annelida:Terebelliformia:Polycirridae)fromthesouthwesternAtlanticJoãoM.M.Nogueira1,PlínioF.vanDeuren1,NatáliaRanauro1,&OrlemirCarrerette1,21InstitutodeBiociências,UniversidadedeSãoPaulo,SãoPaulo,Brazil;2InstitutoOceanográfico,UniversidadedeSãoPaulo,SãoPaulo,Brazil

AnewspeciesofTerebellidesSars,1835(Annelida,Trichobranchidae)fromFrenchFrigateShoals,north-western50)HawaiianIslands,withadiscussiononthemorphologicalcharactersofmembersofTerebellidesJoãoM.M.Nogueira1,LeslieH.Harris2,&OrlemirCarrerette1,31InstitutodeBiociências,UniversidadedeSãoPaulo;2NaturalHistoryMuseumofLosAngelesCounty;3InstitutoOceanográfico,UniversidadedeSãoPaulo51)MultibranchiatePrionospiospeciesfromsoutheasternBrazilAntȏnioJoãoMalafaiaPeixoto&PauloCesardePaivaUniversidadeFederaldoRiodeJaneiro52) AnewhostfortheparasiticgenusVeneriserva(Annelida:Dorvilleidae)fromAntarcticawatersAntȏnioJoãoMalafaiaPeixoto&PauloCesardePaivaUniversidadeFederaldoRiodeJaneiro53)FirstrecordofprotodrilidpolychaetefromKoreaJiseonPark¹,TaeseoPark2,&JongwooJung¹,3

¹InterdisciplinaryprogramofEcocreative,EwhaWomansUniversity;2AnimalResourcesDivision,NationalInstituteofBiologicalResources;3DepartmentofScienceEducation,EwhaWomansUniversity54)ComparativetranscriptomicanalysisoffersinsightintogeneticcontrolofsyllidreproductionGuillermoPonzSegrelles1,RannyeleP.Ribeiro1,ChristophBleidorn2,&M.TeresaAguado21DepartmentodeBiologia(Zoología),FacultaddeCiencias,UniversidadAutónomadeMadrid;2DepartmentofAnimalEvolutionandBiodiversity,Georg-August-UniversityGöttingen55)Stress-associatedgeneexpressionintwomarineinvertebrates(HedistediversicolorandLittorinalittorea)exposedtometalcontaminationattheCallahanCopperMineSuperfundsite(Maine,USA)NancyPrentiss&TimothyBreton

UniversityofMaineatFarmington56)NocturnallyswarmingCaribbeanpolychaetesfromSt.John,U.S.VirginIslands,USANancyPrentissUniversityofMaineatFarmington57)PolychaetesofBocasdelToro,Panama:updatesandnewrecordsNancyK.Prentiss1,LeslieH.Harris2,SergioSalazar-Vallejo3,&StudentsoftheSmithsonianTropicalFieldInstitutecourse:SystematicsandEcologyofCaribbeanPolychaetes1UniversityofMaineatFarmington;2NaturalHistoryMuseumofLosAngelesCounty;3ElColegiodelaFronteraSur

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58)EyeultrastructureinbasalannelidlineagesandtheirimportanceforeyeevolutioninAnnelidaGünterPurschke1,AnjilieBaller1,StepanVodopyanov1,2,TimvonPalubitzki1,&PatrickBeckers31DepartmentofZoologyandDevelopmentalBiology,UniversityofOsnabrück;2DepartmentofInvertebrateZoology,LomonosovMoscowStateUniversity;3InstitutueofEvolutionaryBiologyandEcology,UniversityofBonn59)DistributionpatternsofGlyceriformia(Annelida)aroundIcelandGünterPurschke1,JanaS.Buhre1,&MarkusBöggemann21DepartmentofZoologyandDevelopmentalBiology,UniversityofOsnabrück;2DepartmentofZoology,UniversityofVechta60)FirstrecordforthegenusSabidiusStrelzov,1973(Annelida:Paraonidae)forthesouthernAtlanticOcean,witharedescriptionofthetypespeciesanddescriptionofanewspeciesNatáliaRanauro1,RômuloBarroso2,PauloCesarPaiva2,&JoãoMigueldeMatosNogueira11LaboratóriodePoliquetologia(LaPol),DepartamentodeZoologia,UniversidadedeSãoPaulo;2LaboratóriodePolychaeta,DepartamentodeZoologia,UniversidadeFederaldoRiodeJaneiro61) DescribinganewspeciesofSyllisasapromisingorganismfordevelopmentalstudies(Syllidae,Annelida)RannyeleP.Ribeiro1,GuillermoPonz-Segrelles1,ConradHelm2,BernhardEgger3,&M.TeresaAguado1,21UniversidadAutónomadeMadrid;2Georg-August-UniversitätGöttingen;3UniversitätInnsbruck62) ThreadlikecastsinthetubewallofProtula(Serpulidae,Polychaeta)frombathyalcoralmoundsintheCaribbeanSeaRossanaSanfilippo1,AntoniettaRosso1,AgostinaVertino2,LydiaBeuck3,AndrèFreiwald3,4,&AdrianoGuido51DepartmentofBiological,GeologicalandEnvironmentalSciences,UniversityofCatania;2DepartmentofGeology,GhentUniversity;3SenckenbergamMeer,MarineResearchDepartment,UniversityofWilhelmshavenany;4MARUM,UniversityofBremen;5DepartmentofBiology,EcologyandEarthSciences,UniversityofCalabria63)Polydoridspecies(Annelida:Spionidae)associatedwithcalcareoussubstratesfromNormandy,FranceWakaSato-Okoshi1,KenjiOkoshi2,Jean-ClaudeDauvin3,&HirokazuAbe41LaboratoryofBiologicalOceanography,GraduateSchoolofAgriculturalScience,TohokuUniversity;2DepartmentofEnvironmentalScience,TohoUniversity;3UniversityofCaenNormandyUniversity,LaboratoireMorphodynamiqueContinentaleetCôtière;4DepartmentofBiology,IwateMedicalUniversity64) Identification,distributionandabundanceofaninvasivewormusedasbaitintheKnysnaestuary,SouthAfricaHendrévanRensburg1,ConradMatthee2,&CarolSimon11DepartmentofBotanyandZoology,UniversityofStellenbosch;2AnchorEnvironmentalConsultants,CapeTown65) CompositionanddiversityofpolychaeteassemblagesinthecontinentalshelfofthesouthernMexicanPacificPabloHernández-Alcántara1,FranciscoF.Velasco-López1,VivianneSolís-Weiss2,&LeónF.Álvarez-Sánchez31UnidadAcadémicadeEcologíayBiodiversidadAcuática,UniversidadNacionalAutónomadeMéxico;2UnidadAcadémicadeSistemasArrecifales,UniversidadNacionalAutónomadeMéxico;3UnidaddeInformáticaMarina,UniversidadNacionalAutónomadeMéxico66) Spatialandbathymetrictrendsinpolychaeteassemblagesfromdeep-seaofthesouthernGulfofCalifornia,easternPacificAraceliJaquelínMercado-Santiago1,PabloHernández-Alcántara2,&VivianneSolís-Weiss31FacultaddeCiencias,UniversidadNacionalAutónomadeMéxico;2UnidadAcadémicadeEcologíayBiodiversidadAcuática,UniversidadNacionalAutónomadeMéxico;3UnidadAcadémicadeSistemasArrecifales,UniversidadNacionalAutónomadeMéxico67)PolychaetesfromunderwatermarinecavesnearMarseille(France,Mediterranean)AlexanderTzetlin1,AnnaZhadan1,ElenaVortsepneva1,LaurentVanbostal2,ThierryPerez2,AlexanderEreskovsky2,&PierreChevaldonné21M.V.LomonosovMoscowStateUniversity;2IMBE,Aix-MarseilleUniversite68)ComprehensivestudyoftheheadregionandtentacleapparatusinOweniaborealis(Annelida:Oweniidae)ElenaTemereva1,AlexanderTzetlin1,&VyacheslavDyachuk21M.V.LomonosovMoscowStateUniversity;2NationalScientificCenterofMarineBiology,Vladivostok

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69)Revisionofthreenereididspeciescomplexes(Nereididae):reinstatementoftwogenera,anddescriptionofonenewgenusandsixnewspeciesTulioF.Villalobos-GuerreroDepartamentodeSistemáticayEcologíaAcuática,ElColegiodelaFronteraSur70) Aremarkablenewdeep-seanereididwithbranchiaeTulioF.Villalobos-Guerrero1&GregW.Rouse21DepartamentodeSistemáticayEcologíaAcuática,ElColegiodelaFronteraSur;2ScrippsInstitutionofOceanography71)DevelopmentalstagesofnotochaetaeandanteriorsegmentsinnectochaetelarvaeduringmetamorphosisinChrysopetalumspecies(Chrysopetalidae:Annelida)CharlotteWatsonMuseum&ArtGalleryoftheNorthernTerritory72) ConfirmationofthemudwormPolydorawebsteri(Polychaeta:Spionidae)inoystersfromWashingtonState,USAJasonWilliams1,HeatherLopes2,JulietaMartinelli2,LorenzHauser2,IsadoraJimenez-Hidalgo2,TeriKing3,JaquelinePadilla-Gamiño2,PaulRawson4,LauraSpencer2,&ChelseaWood21HofstraUniversity;2UniversityofWashington;3WashingtonSeaGrant;4UniversityofMaine73) InterstitialnerillidsgoneswimminginthedarkM.J.Hansen1,O.Axelsen1,M.Mizuyama2,K.Kakui3,Y.Fujita4,&K.Worsaae11UniversityofCopenhagen;2UniversityoftheRyukyus;3HokkaidoUniversity;4OkinawaPrefecturalUniversityofArts74)Coralreef-associatedinfaunalpolychaetesinthewesternGulfofThailandThamasakYeemin,MakamasSutthacheep,SittipornPengsakun,WanlayaKlinthong,LaongdownJungrak,&RattanawadeeNiamsiriRamkhamhaengUniversity

Abstracts:OralPresentations

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Abstracts:OralPresentationsPresentationsarelistedalphabeticallybypresenterlastname.PhylogeneticinformationonNereididae(Annelida:Phyllodocida)mitochondrialgenomes:thestatusofNereidinaeandtheuseofmitochondrialgeneordertoestablishgroupsatthesubfamilylevelPauloR.Alves1,KennethM.Halanych2,&CinthyaS.G.Santos11UniversidadFederalFluminense;2AuburnUniversityNereididaeisoneofthemoststudiedAnnelidlineages,butevenso,thephylogeneticrelationshipswithinthegrouparenotunderstood.Previousstudieshavedisagreedonthemembershipoftherecognizedsubfamiliesandcurrenttaxonomylacksaphylogeneticunderpinning.ThisstudyusescompletemtDNAgenomeandtranscriptomedatatoevaluatetherelationshipswithinthefamily.OurresultssuggestthatNereidinaeisnotamonophyleticgroupalthoughGymnonereidinaeandNamanereidinaestillhavetobetested.Ontheotherhand,atleastonehigher-levelgrouprecoveredintheanalysespossessesauniquemitochondrialgeneorder,asynapomorphyfortheclade.Ourresultssuggestthattheutilityoftraditionallyusednereididcharacters(suchasparagnaths,chaetalmorphology,etc)needtobereevaluatedinlightofphylogeneticrelationships.SequencingofmtDNAgenomefrommoreNereididaespeciesissuggestedtoenhancephylogeneticinformationandestablishgroupsatthesubfamilylevel.IntegratingDNAbarcodingwithtraditionalmorphology-basedtaxonomy:assessmentofspeciesdiversityinmarinebristleworms(Annelida)TorkildBakken1,JonAKongsrud2,EivindOug3,TomAlvestad2,ArneNygren4,KatrineKongshavn2,NataliyaBudaeva2,MariaCapa1,5,ThomasDahlgren4,6,&EndreWillassen21NorwegianUniversityofScienceandTechnology,NTNUUniversityMuseum;2DepartmentofNaturalHistory,UniversityMuseumofBergen;3NorwegianInstituteforWaterResearch;4DepartmentofMarineSciences,UniversityofGothenburg;5DepartmentofBiology,UniversityoftheBalearicIsland;6NORCENorwegianResearchCentreAssessingspeciesdiversitywithDNAbarcodingofpolychaetesinNorwegianwatershasprovidedconsiderabledataofdiversity,anddemonstratedlackofknowledgeandmethodologicalproblems.DNAbarcodinghasindicatedaconsiderablyunderestimateddiversityamongpolychaetes.About730namedspeciesareknownfromthearea.Spanningalargerangeofhabitats,4000sequencedspecimensof500morphospeciesyielded1700barcodeswhichgroupin700BarcodeIndexNumbers(BINs).Anaveragesuccessrateof50%indicatemethodologicalchallenges.Nevertheless,avaryingsuccessrateof40-100%,analyseshaverevealedunknowndiversityinallfamiliesrepresented.Fromthisitispossibletoestimatediversityforeachpolychaetefamily.DNAbarcodinghascontributedtobuildareferencelibraryforidentificationofspeciesdiversity.Underestimateddiversityunderpinslackofknowledgeofpolychaetewormsinvastgeographicareas.AmajorchallengefortaxonomicworkistoassignpresentspeciesnamestoBINs.Accordingtobasicprinciplesfortaxonomicwork,thebestsolutionistoaffiliatethenametotopotypicmaterial,implyinganeedtosampleattypelocalities.AreferencelibraryfromDNAbarcodeswillserveasabackbonewhengenomictechniqueswillbringthemolecularcharacterizationofspeciesdiversityforward,butalsolinkedtomorphologicaltaxonomy.TheevolutionofthecentralnervoussysteminAnnelidaPatrickBeckers1&ConradHelm21InstituteofEvolutionaryBiology&Ecology,UniversityofBonn;2JohannFriedrichBlumenbachInstituteforZoology&Anthropology,Georg-August-UniversityGöttingenIntextbooks,thecentralnervoussystemofAnnelidaisdescribedastoconsistofadorsalbrain,inmosttaxalocatedintheprostomium,andnervesthatencirclethemouthandconnectthebraintotheventralganglionicnervoussystem.Thisstatement,however,ischallengedbytheresultsofcurrentphylogenomicinvestigationstounraveltheevolutionofAnnelida.RecentneuroanatomicalstudiesofthebasallybranchingtaxaMagelonidaeandOweniidaeshowthattheanatomyofthenervoussystemdifferssignificantlyfromthetextbookannelid’snervoussystem.InordertoshedlightontheevolutionofthecentralnervoussysteminAnnelida,thenervoussystemsof49speciesrepresentinganneliddiversitywereinvestigatedusingdifferentmorphologicalapproaches.Resultsoftheinvestigationsuggestthatacomplexbrainwithdifferenttracts,anuchalorgan,complexeyesandaganglionicnervoussystemarenotpartoftheannelidgroundpatternandthataropeladderlikenervoussystemisarareexception.


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LarvaldevelopmentofPseudopolydorapaucibranchiata(Spionidae,Annelida)fromFloridaViktoriaE.Bogantes1,KennethM.Halanych1,&MichaelJ.Boyle21AuburnUniversity;2SmithsonianMarineStationatFortPierceGiventhediversityofannelidforms,relativelylittleisknownaboutthedevelopmentalprocessesthattransformalarvaintoanadult.Here,wedescribedevelopmentofmusculature,serotonergicelementsofthenervoussystemandciliationduringlarvalformationinPseudopolydorapaucibranchiatausingconfocallaserscanningmicroscopy(CLSM).Thereisasimultaneousdevelopmentofmusclesassociatedwiththebodywallanddigestivesystem,andmusclesassociatedwithchaetalsacsarethemostprominentinearlystages.Firstserotonergiccellsappeartobeassociatedwiththetipofeachchaetalsac,similartosabellarids.Ciliationisextensiveandincludesmultipleciliarycellsaroundthehead,stomodeumandgut,andonthepygidium.Completelycircularizedtrochalbandswerenotobserved.Interestingly,noapicaltuftisdistinguished.ComparativestudiesusingCLSMwithunderstudiedgroupswillbroadenourunderstandingofevolutionarydevelopmentalpatternsacrossAnnelida.OnthecomplexdiversityofEurythoe(Amphinomida:Amphinomidae)ElizabethBorda1;BeatrizYanezRivera2,RomuloBarros3,MirandiaJohnson1,AndresArias4,JerryKudenov5,PaoloPaiva6,AnjaSchulze7,&GregRouse81TexasA&MUniversitySanAntonio;2CentrodeAlimentacionyDesarrollo(Mazatlan);3PontifíciaUniversidadeCatolicadoRiodeJaneiro;4UniversidaddeOviedo;5UniversityofAlaskaAnchorage;6UniversidadeFederaldoRiodeJaneiro;7TexasA&MUniversityGalveston;8ScrippsInstitutionofOceanographyMitochondrial(mt)genedatahasshownthatthecosmopolitanfirewormEurythoecomplanataisacomplexofhighlydivergentgeneticlineages.GeneticandmorphologicalevaluationsofrepresentativesfromtheCaribbeancoast,SouthAtlantic(SA)islandsandtheGulfofPanama,supportedthepresenceofatleastthreecrypticspecies.EurythoelaevisetiswasresurrectedfortheSAislandpopulationsanddistinguishedfromE.complanataduetotheabsenceofharpoonchaetae,withathirdPacificspeciesrecognizedbutinneedoffurtherstudy.BothE.complanataandE.laevisetishavebeenrecentlyrecordedintheMediterraneanSea.HerewebuildonpreviousworkandevaluatethediversityoftheE.complanatacomplex.ThephylogeneticrelationshipsareinferredfrommtandnucleargenedataandsampledpopulationsfromtheeasternandwesternPacificOcean,GulfofCalifornia,andMediterraneanSea.PhylogenyofLumbrineridae(Annelida):afirstmolecularapproachPolinaBorisova1&NataliyaBudaeva21P.P.ShirshovInstituteofOceanology,RussianAcademyofSciences;2DepartmentofNaturalHistory,UniversityMuseumofBergen,UniversityofBergenLumbrineridaecompriseover200describedspeciesgroupedin19genera.Themostimportantdiagnosticcharactersforgeneraandspeciesarefoundinthemaxillarystructures.Todate,nomolecularstudiesspecificallyonlumbrineridphylogenyhavebeenconducted,andmanygeneracompletelylackmoleculardata.Inthepresentstudy,wereconstructedphylogenyofthefamilyandtestthemonophylyofcurrentlyacceptedgenerabasedonacombinationofnuclear18Sand28SrDNAandmitochondrial16SrDNAandCOIgenes.Wealsostudiedmorphologyofjawapparatusesineightspeciesusingmicro-CT.Ourresultscontradictthepreviouslypublishedmorphology-basedphylogenyinrelationshipsbetweenthegenera.Typegenus,Lumbrineris,appearedparaphyletic,whileNinoeandGallardonerisweremonophyletic.Severalcharactersofjawmorphologypreviouslyseenassynapomorphiesoflargecladeswereshowntobehomoplastic.Crypticdiversityandgeneticconnectivityinthedeep-seaannelidsacrosstheGreenland-Iceland-ScotlandRidgeNataliyaBudaeva1,MariaCapa2,ArneNygren3,TomAlvestad1,KarinMeißner4,MiriamGötting4,LuisFelipe1,MartellHernández1,TorkildBakken5,EivindOug6,&JonKongsrud11DepartmentofNaturalHistory,UniversityMuseumofBergen,UniversityofBergen;2UniversityoftheBalearicIsland;3UniversityofGothenburg;4SenckenbergResearchInstitute;5NorwegianUniversityofScienceandTechnology,NTNUUniversityMuseum;6NorwegianInstituteforWaterResearchGreenland-ScotlandRidge(GSR)actsasatopographicalbarrierseparatingtheNordicSeasfromtheNorthAtlantic,withamaximumthresholddepthof840mintheFaroeBankChannel.TheGSRhasbeenshowntoaffectthedistributionofvariousdeep-seabenthicorganismssuchascrustaceansandmollusks.WeaimtoestimatetheroleofGSRingeneticconnectivityinannelidfaunabetweenthedeepNordicbasinsandthedeepareasintheNorthernAtlanticsouthtoGSRandtoidentifythedegreeofbiasinassessingdistributionofannelidmorpho-speciesincomparisontospeciesdelimitedbasedongeneticinformation.Weassessmorphologicalandgeneticdiversityinsevengeneraofannelids,representingthefamiliesAmpharetidae,Lumbrineridae,Scalibregmatidae,Opheliidae,Sphaerodoridae,Spionidae,andTerebellidae.Speciesaredelimitedbasedonsingleormultiplelocianalysesofmitochondrial(COI,16SrDNA)andnuclear(ITS,28SrDNA)markers.Identificationofspeciesbasedonexclusivelymorphologicaldatasignificantlyaffectcorrectassessmentofgeographicaland


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verticalrangesinthedeep-seaannelidspecies.DNAbarcodesbasedofCOIsequencesare,inmostcases,effectiveindicatorsofputativespecies,howeveradditionalnuclearmarkersareneededforrobustspeciesdelimitationanalysis.Ineachstudiedgenusofthedeep-seaannelids,multiplecrypticlineagesaredetectedafterapplyingmolecularspeciesdelimitationtools.Distributionofseveralmolecular-delimitedspeciesinhabitingbathyalandabyssaldepthsacrossGSRisconfirmed,posingaquestiononthemechanismsofthedeep-seaspeciesdispersalacrosstopographicbarriers.PalatabilityanddefensivestrategiesinpolychaetesMarinaCyrinoLealCoutinho1,ValériaLaneuvilleTeixeira1,2,&CinthyaSimoneGomesSantos11DepartmentofMarineBiology,InstituteofBiology,UniversidadeFederalFluminense;2InstituteofBiosciences,UniversidadeFederaldoEstadodoRiodeJaneiroTheinformationaboutdefensivestrategiesinpolychaetesisscarce.TheaimofthisstudywastoinvestigatetherelationshipofpalatabilitywithdefensivestrategiesandbiologicalcharacteristicsofBranchiommaluctuosum(Sabellidae)andPhragmatopomacaudata(Sabelariidae),collectedinregionsmoreandlessimpactedbyexcessoforganicmatter(BoaViagemandItaipu,respectively).BioassayswereperformedbyofferingbodypartsofspeciestothegeneralconsumerCalcinustibicen.Differentbodypartsmaypossessstructuralandchemicaldefense,sothecrownsweremaceratedandofferedtoconsumers.Atotalof85replicateswereusedforB.luctuosumand106replicatesforP.caudata.ThebodyofB.luctuosumpresented100%ofrejectionandaftermaceration,about95%ofthebranchialcrownwasrejectedinbothsites,andthespeciesconsideredunpalatable.ThebodyofP.caudatapresented56.38%ofrejection,consideredpalatable,andtheopercularcrownpresented86.40%ofrejectionaftermaceration,beingconsideredunpalatable.Thegreaterexposure,darkoraposematiccolorationandmobilityarerelatedtounpalatability,thatisprobablyassociatedwithbothstructuralandchemicaldefensesinspeciesofthetwoplaces.SwimmingofthemidwaterpolychaeteTomopterisJoostDaniels1,KarenOsborn2,1,NadègeAoki2,JoshHavassy2,NataliaMushegian2,andKakaniKatija11MontereyBayAquariumResearchInstitute;2DepartmentofInvertebrateZoology,NationalMuseumofNaturalHistory,SmithsonianInstitutionTomopteridsareafamilyofhighly-derived,holopelagic,gelatinouspolychaetesfoundthroughouttheworld’soceans.Tomopteridspropelthemselvesthroughthewaterwithaspeedandmaneuverabilitythatarevisuallydistinctfromotherswimmingpolychaetessuchasnereids.Weusedhigh-speedvideorecordingsoftomopteridsinthelabtostudytheirswimmingmotion(kinematics),whichincludesaforward-travelingbodywaveandmovementoftheelongatebifidparapodia.Wepresentananalysisoftheswimmingkinematicsofregularforwardmotion.Wefoundthatactivepaddlingoftheparapodiageneratesforwardthrustwhichaugmentsthethrustderivedfromthebodywave.Furthermore,thebodywaveallowsforincreasedrangeofmotionoftheparapodia,resultinginanincreaseddisplacementofthebodyperstroke.Thecharacteristicsoftherecoverystrokedeviatefromothermetachronalsimplifiedmodels,andmetricsarepresentedforthisnewmode.Ourresultsprovideinsightinthekinematicsoftomopteridsandcouldhaveapplicationsinbiomimeticsandsoftrobotics.BiogeographyanddiversityofFalklandIslandsPolychaetaTeresaDarbyshireAmgueddfaCymru-NationalMuseumWalesLargescaleinvestigationofintertidalandnearshorepolychaetesaroundtheFalklandIslands,from2011–2015,foundalargenumberofnewspecies,somecompletelyunknownbutothersthathadpreviouslybeenmis-identified,manyundernorthernhemispherenames.Theknownspecieslisthasincreasedby18%with21newrecordsand4newtaxabuttaxaoriginallydescribedfromthenorthernhemispherestillmakeup14%ofthelist.Biogeographically,theFalklandIslandspolychaetefaunafallwithintheMagellanregionandmorethan85%ofthetaxathatwereidentifiedarefoundelsewhereintheregionalso.However,thefaunaisalsocloselylinkedwithSouthGeorgiatotheeast(45%sharedtaxa)andAntarcticatothesouth(48%sharedtaxa)despitetheseregionsbeingseparatedfromtheIslandsnotjustbydistancebutalsobythePolarFront.Explanationsforfaunalexchangebetweentheseparateregionsarediscussed.PotentialenvironmentaldriversofpolychaetedistributionandcompositionaroundtheIslandsweredeterminedthroughclusteranalysesandmulti-dimensionalscalingplots.ClusteranalysesandMDSplotsshoweddepthtohavethemostinfluenceonspeciescompositionwithshoreheightandsedimenttypehavinglimitedeffect.Taxonomicdistinctnessindiceshighlightthosestationswherespecieslistsweredominatedbyparticulartaxa.Microhabitatssuchasbiogenicencrustationsandalgalandepifaunalturfsharbouredthegreatestnumbersanddiversityoftaxa,particularlySyllidae,TerebellidaeandSabellidae.Syllidaewerethemostdiversefamilyoverall,constituting12%ofthenamedtaxa.


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Therecentspreadofthenon-indigenousspecies,Hermunduraamericana(Polychaete:Pilargidae)throughouttheChesapeakeBayDanielDauer1,AnthonyJ.Rodi1,RobertoJ.Llansã2,&SuzanneArcuri21OldDominionUniversity;2Versar,IncIn2009thepilargidpolychaete,Hermunduraamericana,wasfirstrecordedintheChesapeakeBayatasinglelocationintheSouthernBranchoftheElizabethRiver.PreviouslyknownonlyfromtheGulfofMexico,itbecamewellestablishedthroughouttheSouthernBranch.In2012H.americanawasfoundatasinglelocationintheJamesRiver.By2014ithadspreadtomuchoftheJamesRiverfromthepolyhalinetooligohalinesalinityzonesinbothmuddyandsandysediment.ThisspeciesisnowoftenoneofthreetofourmostabundantmacrobenthicspeciesintheJamesRiver.Through2017itwasnotfoundoutsidetheJamesRiverandwepreviouslyspeculatedaboutuniquehydrodynamiccirculationbarriersandpossiblesalinitytolerancelimitationsinhighsalinitiesoftheBay.2018wasoneofthewettestyearsinthehistoryoftheChesapeakeBaywatershedandthisspecieswasfoundatthreelocationsintheupperChesapeakeBayoutsideoftheJamesRiver.NowthatithasbeenfoundbeyondthepresumedbarrieroftheBaymouth,H.americanaislikelytobecomeestablishedthroughouttheChesapeakeBay.Thefeedingandreproductionofthisspeciesisunknown.Indeed,littleisknownofthebiologyofanyspeciesofPilargidae.Therearepresentlynoknownnegativeecologicaleffectsofthenon-indigenousspecies,H.americana.Thisisthefirstreportednon-indigenousinfaunalpolychaetespeciesofChesapeakeBay.AstudyofPectinariagouldiiandPhragmatopomalapidosabiocementproteinsMariaA.DeanCoeCollegePhagmatopomalapidosaisapolychaetaewormthatlivesinintertidalzonealongtheAtlanticcoastofNorthAmerica.Thiswormproducesandsecretesabiocementtoadheregrainsofsandtogether,formingaprotectivetube.Thewormsliveinlargecoloniesandbuildonexistingtubestoformlargereef-likestructureswhichareimportantforthecoastlineecosystem.Pectinariagouldiiarelarger,benthicwormsthatalsoresideinintertidalregions,butliveasindividuals.Thewormsselectgrainsofsandandadherethemtocreateanicecreamconeshapedenclosure.Wefoundthatbiocementproteinsfrombothspecieshaveahighpercentageofrepeatingaminoacidssuchasserineandtyrosine.WealsofoundthataboutathirdoftyrosinesinthebiocementsareconvertedtoDOPA,whichthenformcrossbridgesandstrengthenthebiocement.Serinecanalsobemodifiedbyphosphorylation,makingtheproteinshighlyacidicandcontributingtotheadhesivenatureofthebiocement.Thestudyofwhichaminoacidsattachtomineralsurfacesisimportantforunderstandingthemechanismofbio-adhesion.Thespecificaminoacidsandproteinspresentinthebiocementcouldexplainitsorganizationonamolecularlevelandgivemoreinsightintofuturestudiesforexploringbio-adhesion.MolecularandmorphometricanalysesrevealhighlyunderestimateddiversityinEteone(Phyllodocidae,Annelida)MarthaWilliamsEverett1,NataliyaBudaeva2,GlafiraKolbasova3,&TatyanaNeretina31DepartmentofInvertebrateZoology,MoscowStateUniversity;2DepartmentofNaturalHistory,UniversityMuseumofBergen,UniversityofBergen;3WhiteSeaBiologicalStation,MoscowStateUniversityGeneticdiversityofthegenusEteone,Savigny,1820(Phyllodocidae)wasstudiedusingmitochondrial(COI,16S)andnuclear(28S)markers.ThematerialwasobtainedmostlyfromtheWhiteSeabutalsoincludedspecimensfromtheSeaofOkhotsk,theBarentsSea,theNorwegianSea,theNorthSea,theGreenlandSeaandtheWestcoastofAfrica.ThestudydiscoveredsixmonophyleticcladesofEteonefromtheWhiteSeaandmorethan19cladesaltogetheramongtheexaminedmaterial.MorphologicalstudyrevealedfivemorphotypesintheWhiteSeadifferingintheshapeoftheprostomium,parapodia,dorsalandventralcirriandinthestructureoftheproboscis.PreviouslyonlytwospeciesofEteone(E.flavaandE.longa)werereportedfromtheWhiteSea.TheobtainedresultssuggestthatthegenusEteonerequiresfurtherrevisionincludingtheuseofgeneticdatainthestudyareaandworldwide.PolychaetesassociatedwiththebryozoanBugulaneritinainmarinasoftheIberianPeninsulaandnorthernMoroccoAlejandroFernández-Romero1,JuanMoreiradaRocha2,&JoséManuelGuerra-García11LaboratoriodeBiologíaMarina,DepartamentodeZoología,FacultaddeBiología,UniversidaddeSevilla;2DepartamentodeBiología(Zoología),UniversidadAutónomadeMadrid,CantoblancoTheincreaseofmarineinfrastructuresresultsinsignificantimpacttoadjacentecosystems.Infact,thepresenceofmarinasmodifiestheoriginalenvironmentalconditionsandendsupdisturbingthefaunalcommunity.However,despitetheessentialroledisplayedbymacrofaunaonmarinas'foulingbiota,certaintaxasuchaspolychaeteshavebeenpoorlystudied.ThepresentstudyprovidesthefirstspatialcharacterizationoftheepibiontpolychaetefaunaassociatedwiththebryozoanBugulaneritinainmarinasalongtheIberianPeninsulaandthenorthofMorocco.Atotalof32polychaetespecieswereidentified,withSyllidaebeingthemostdiversefamily.Furthermore,theenvironmentalfactorsinvolvedintheoccurrenceandabundanceofthedominantspeciesSalvatoriaclavatawerealsoanalyzedbyGeneralizedLinearModels;resultsshowed


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thatthehighestpredictedvaluesofS.clavataabundanceappearedatmarinaswithhighlevelsofnutrientenrichmentandofheavymetalsconcentration.PhylogeneticinferenceandthemisplacedpremiseofsubtitiutionratesKirkFitzhughNaturalHistoryMuseumofLosAngelesCountyThree‘methods’havebeenendorsedforinferringphylogenetichypotheses:parsimony,likelihood,andBayesianism.Thelattertwoareregardedassuperiorbecausetheyconsiderratesofsequenceevolution,whereasitissaid‘parsimony’lacksevolutionary‘models’altogether.Areratesofsubstitutionjustifiedininferencesofexplanatoryhypotheses?Fourissuesneedtobeaddressed:1)theaimofscientificinquiry,2)thenatureofwhy-questions,3)inferencesofexplanatoryhypothesesasanswerstowhy-questions,and4)acknowledgingthatparsimony,likelihood,orBayesianismarenotinferentialactionsleadingtoexplanatoryhypotheses.Theaimofscientificinquiry,includingsystematics,istoacquirecausalunderstandingofeffects.Observationstatementsoforganismalcharactersleadtoimplicitorexplicitwhy-questions.Conveyedindatamatrices,questionsassumethetruthofobservationstatements,whichiscontrarytoinvokingsubstitutionrateswithininferencestophylogenetichypotheses.Inferencesofexplanatoryhypothesesareabductive,suchthatanevolutionarytheory(ies)is/areincludedorimplied.Phylogeneticinferencescannotbedistinguishedas‘parsimony,’‘likelihood,’or‘Bayesian’;theyarejustabductive.Ratesofsequenceevolutionmustbeconsideredpriorto,ratherthanwithinabduction.Thequestionthenbecomeswhetherornotitisrealistictoattempttorenameputatively-sharednucleotidesperthebackgroundassumptionofratesofsubstitution,orattempttoexplainmodifiedobservationstatements.Thereappeartobenoepistemicgroundsforrenamingsharedcharacterstoaccommodaterates.This,coupledwithproblemsassociatedwithdownwardcausationdescribedbyFitzhugh[2016,ActaBiotheoretica64(2):133–160],limitopportunitiestocausallyaccountforsequencedataviaphylogenetichypotheses.Epigenetics,methionineanddevelopmentalplasticityinthespionidPolydoracornutaGlenysGibson,GinaMacDonald,&MarleneSnyderAcadiaUniversityWetestedtheeffectsofmethionine,limitedinthedietsofmarinedetritivores,onplasticityinlarvaldevelopmentinPolydoracornuta,andalso,potentialepigeneticeffectsofmethionineonDNAmethylation.Controlbroodshadtheexpectedpatternofdevelopmentwiththreemorphsofoffspringinequalproportions.Parentalexposuretomethioninealtereddevelopmentwiththehighestexposure(10-5M)increasingtheproductionofsmalllarvae,andthelowestexposure(10-9M)producingarangeoflarvalmorphssimilartocontrols.Differencesinmaternalmethylationweredemonstratedthroughtotalgenomedigestionwithmethyl-sensitiveenzymesandanalysisofDNAsmearswithImageJ.ExposureoffemalestoallthreeconcentrationsofmethioninesignificantlyreducedDNAmethylationrelativetothecontrols.TheseresultsindicatethatdevelopmentalplasticityinP.cornutaisepigeneticandisinfluencedbyapotentiallylimitingnutrient(methionine)intheparentalenvironment.ComplexitieswithinMacellicephalinae(Polynoidae,Annelida)BrettC.Gonzalez1,KatrineWorsaae2,&KarenOsborn11NationalMuseumofNaturalHistory,SmithsonianInstitution,DepartmentofInvertebrateZoology;2UniversityofCopenhagen,MarineBiologicalSection,DepartmentofBiologyWithinAphroditiformia,Polynoidaeisthelargestandmostdiversegroup,havingcolonizedallmarinehabitatsandecologicalextremes.Amongthosestrictlyboundtothedeepsea,Macellicephalinaeareoneofthemostabundantgroupsandareprevalentamongabyssalmuds,whalefalls,chemosyntheticvents/seeps,andareremarkablyoneofthefewannelidgroupsknownfromhadaldepths.Theircomplexevolutionaryhistoryisreflectedacrosstheirnumerousandwide-ranginghabitatcolonizations.However,duetorestrictedaccess,fewstudieshaveassessedMacellicephalinaeevolutioninto,ororiginwithin,thesehabitats.Asaresult,longstandinguncertaintiespersistintheinterpretationofMacellicephalinaeevolutionduetolackofphylogeneticresolutionandrepresentation.Whilerecentphylogeneticanalyses,includingthoseintegratingmitochondrialgenomeshavecontinuedtointegratefewmacellicephalinidrepresentatives,includingbranchiatedeepseaspeciesandthosefoundinanchialinecaves,thelargestandmostprevalentgenus,Macellicephala,hasneverbeeninvestigatedusinggeneticdata.HereinwepresentfindingsofourongoingphylogeneticanalysesintotheparaphylywithinMacellicephalinae,beingthefirstanalysestoincludeMacellicephalafromboththeAtlanticandPacificOceans.Furthermore,wecommentonthepreviouslyundocumentedcommensalrelationshipbetweenMacellicephalaspeciesandtorquaratoridacornworms(Hemichordata,Enteropneusta).Together,thesesystematicinvestigationsaimtoidentifyrelationshipsandadaptationsamongthemacellicephalinidgenera,inevitablyhelpingguideourongoingphylogenomicinvestigationsintotheunderlyingfunctionalandmolecularmechanismsofadaptationacrossextremeenvironments.


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PolychaetesinhabitingmassivespongesfromshallowandmesophotichabitatsalongtheIsraeliMediterraneancoastLironGoren1,2,TalIdan1,SigalShefer1,2,&MichaIlan11SchoolofZoology,TelAvivUniversity;2SteinhardtMuseumofNaturalHistory,TelAvivUniversitySpongeshostdiverseassemblagesofinvertebrates,whichareusuallydominatedbypolychaetes,providingthemwithshelterandconstantfoodsupply.Thisstudyinvestigatesthe endobioticpolychaetecommunityof10spongespeciesfromshallow(1-30m)and,recentlydiscovered,mesophotic(90-120m)habitatsalongtheIsraelicoast.Seventy-onespongespecimenswerecollectedbySCUBAdivingintheshallowwaterorbyRemotelyOperatedVehicleinthemesophoticspongegroundsbetweentheyears2016-2018.OlderspecimensdepositedintheSteinhardtMuseumofNaturalHistory(Tel-Aviv,Israel)wereexaminedaswell.Atotalof35polychaetetaxawerefound,includingspeciesreportedforthefirsttimefromtheIsraelicoast.Totalrichness,meanrichnessandmeanabundance,weresimilarinbothhabitats(p>0.1).However,thecommunitycompositiondifferedsignificantly(ANOSIM,R=0.48,P<0.001).Onlyathirdofthepolychaetetaxawerefoundtoinhabitbothhabitats.Twonereididspeciesdominatedthefauna(Ceratonereiscostaeinthemesophotichabitat,andLeonnatesindicusintheshallowhabitat),andtheycontributedthemosttothedifferencesbetweenthetwohabitats(SIMPER).Nocorrelationwasfoundbetweenspongevolumeandspeciesrichness/abundance.Thisisthefirststudytosponge-associatedcommunitiesintheeastern-mostpartoftheMediterranean.ThefindingssuggestthatspongesmaintainingtheirfunctionalroleasecosystemengineersforpolychaetefaunaintheIsraelicoast.Moreover,sponge-inhabitingpolychaeteassemblagesinbothhabitatsconstituteuniquecommunities,probablydueofthedifferenceinenvironmentalconditionsbetweenthedynamicshallowandmorestablemesophotichabitats.YouCANhavefirewithoutoxygen!Howthebeardedfireworm,Hermodicecarunculata,reactstohypoxicconditionsCandaceGrimes,LenePetersen,&AnjaSchulzeTexasA&MUniversityGalvestonBeardedfireworms,Hermodicecarunculata(Annelida:Amphinomidae),occurthroughouttheAtlanticOceanbasin,andportrayawiderangeoftolerancestoabioticfactors,suchastemperature,salinity,anddissolvedoxygen(DO).Sincethespeciesiscommonlyoccurringandrobusttochanges,itmayprovetobeapromisingmodelorganismforhypoxiastudies,whichareincreasinglyimportantwiththeprojectedescalationofhypoxiazonesinthefuture.MolecularresponsesofH.carunculatatochronicandintermittenthypoxicconditionswereinvestigatedtoestimatethedissolvedoxygen(DO)levelatwhichtheyareaffected.Forchronichypoxia,fivebeardedfirewormswereexposedtooneofthreelevelsofDOin40-litertanksforsevendays:2.5(±0.25)mg/l,4.5(±0.25)mg/1,and7(±0.25)mg/1(normalDO).Toinvestigateintermittenthypoxiaresponses,16wormsweresubjectedtointermittenthypoxia(6hoursofhypoxiaand18hoursofnormoxia)for2daysandsampledfortissuesat6,18,24,and42hours.Noreferencegenomeexistsforthespecies,soacombinedreferencetranscriptomewasassembledfromsequencesandutilizedtoaligntheRNAseqdatafromindividualsfordifferentialgeneexpressionanalysis.Pairwisecomparisonsoftranscriptomesrevealedup-regulationofkeyhypoxiaandstressresponsegenesanddown-regulationofmetabolicpathwaygenesinthewormsunderchronichypoxia.Followingchronichypoxiaexposure,differencesingeneregulationwerenotedbetweenthetwoexperimentalgroups,indicatingtheDOlevelschosenweredistinctenoughtoinvokedifferingresponses.Similarresponseswerefoundunderpairwisecomparisonafternormoxicandhypoxictimespansduringtheintermittenthypoxia.Notingdifferentialgeneexpressionresponsesinthismarineinvertebrateprovideusefuloxygenlimitsandhypoxiaresponselevelstoinformfuturestudiesonothermarinespecies.Wormsfromtheabyss:anneliddiversityandspeciesdistributionfromAustralia’seasternlowerbathyalandabyssalenvironmentsLaetitiaGunton1,ElenaKupriyanova1,2,TomAlvestad3,NataliyaBudaeva3,IngoBurghardt1,MagdalenaGeorgieva4,PatHutchings1,2,JonKonsgrud3,AnnaMurray1,HannelorePaxton1,2,RobinWilson5,&JinghuaiZhang2,61AustralianMuseumResearchInstitute,AustralianMuseum;2DepartmentofBiologicalSciences,MacquarieUniversity;3DepartmentofNaturalHistory,UniversityMuseumofBergen,UniversityofBergen;4LifeSciencesDepartment,NaturalHistoryMuseum,London;5MuseumsVictoria;6SouthChinaSeaEnvironmentalMonitoringCentreThepioneering2017expedition“SamplingtheAbyss”onRVInvestigator,wasthefirstAustralianresearchcruisefocusedoninvestigatingtheeasternabyssalenvironmentfromTasmaniatosouthernQueensland.Forty-ninebeamtrawland27Brenkesledsampleswerecollectedfrom13sitesatbothlowerbathyal(~2500m)andabyssal(~4000m)depths.Atotalofabout3200annelidspecimens(Polychaeta,SipunculaandEchiura)werecollected.Polychaetes,themostabundantgroup(2988individuals),werecomposedof32familiesand114species/OTUs.Serpulidae,AphroditidaeandAmpharetidaewerethemostabundantfamilies.Eighty-onespeciesmaybenewtoscience,including5speciesofNothria(Onuphidae),4ampharetidsand2Petta(Pectinariidae).Thisprojecthasvastlyincreasedtheunderstandingofannelidabundance,diversityandspeciesdistributionintheAustraliandeep-seaenvironment.


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Thegenomeofdeep-seaseep-dwellingLamellibrachialuymesi(Siboglinidae)andcluesonchemosyntheticsymbiosisKennethM.Halanych,YuanningLi,MichaelG.Tassia,DamienS.Waits,ViktoriaE.Bogantes,&KyleT.DavidAuburnUniversityThelong-livedgutlesstubewormLamellibrachialuymesi(Siboglinidae)isfoundatdeep-seacoldseepsintheGulfofMexicoandhasservedasmodeltostudychemosyntheticsymbiosisandadaptationtoextremeenvironments.However,theevolutionofgenomicandmolecularmechanismsinvolvedinsuchsymbiosisispoorlyunderstood.Here,wepresentandcharacterizethegenomeofLamellibrachialuymesi.Inrelationtochemoautotrophy,wefoundevidencethatsymbiontscompensateforthehost’sdeficiencyinaminoacidbiosynthesisandfoundalargeexpansionofhemoglobinB1genes(thesegenesmayfunctioninsulfide-bindingtohelpfeedtheendosymbionts).ComparativeanalysessuggesttheToll-likereceptorpathwaymaybeessentialtohostimmunityandtolerance/sensitivitytosymbiontsandpathogens.Last,weidentifiedseveralgenesthatpotentiallyplayanimportantroleinorganismallongevity.BurrowdimensionsandnetworkpropertiesinheterogeneoushabitatsRachelHale1,2,CamillaCassidy2,SharifAhmed3,ErnestoEstrada4,JasminA.Godbold2,5,&MartinSolan21NationalInstituteofWaterandAtmosphericResearch,NewZealand;2OceanandEarthScience,NationalOceanographyCentreSouthampton,UniversityofSouthampton;3DiamondLightSourceLtd,HarwellScience&InnovationCampus;4InstituteofAppliedMathematics,Spain;5BiologicalSciences,UniversityofSouthamptonTheuseofcomputedtomographyforassessmentofsedimentbioturbation,throughthedifferentiationofvolumesofsedimentwithcontrastingdensities,hasallowedthecharacterisationofbulkburrowmetricsallowingstatisticalcomparisonofburrowsurfaceareaandvolumeacrossreplicatedtreatments.ConnectedHedistediversicolorburrowgalleriesshowsimilarpropertiestonetworkstructures,withpointsinthree-dimensionalspace,“nodes”,connectedbyburrowtunnels.Hereweshowthatbytreatingburrowgalleriesasanetworktheycanbeconvertedintoamathematicalrepresentation(adjacencymatrix)andwecaninterrogatethesematricstomakestatisticalcomparisonsonburrowstructure.IndividualsofH.diversicolor(n=20)wereallowedtoburrowinsoftsedimentfor24hoursacrossinsedimentenrichedin5differentconfigurations(n=4);homogenousnon-enriched,homogenousenriched,bottomhalfenriched,tophalfenrichedandquartered.Wefindthatthenetworksweremostly“trees”withnoloopsorrepeatedmotifs.Burrowsurfacearea,volumeandnodenumberoflargestinthehomogenousnon-enrichedtreatment,andbranchingindicesshowthatthemostbranchingoccursinmoreheterogenousnetworks(halfenriched).Environmentalconditionsthereforehavethepotentialtofundamentallychangehowanorganisminteractswithandbehavesinitsenvironmentwithconsequencesfornutrientregenerationandcarbonsequestrationandotherecosystemfunctions.Who'sthatguy?Whathappenswhenwormsusesomeoneelse’sname?PatHutchings1&NicolasLavesque21AustralianMuseum;2CNRS,UniversityofBordeauxPolychaetesarerelativelywellknowninsomeareaswithrelevantidentificationkeysavailable,elsewherethisisnottruewithecologistsusinginappropriatekeysleadingtomisidentifications.Itisalsobecomingincreasinglyapparentthatmostspecieshavediscretedistributions.Forexample,Marphysasanguineahasbeenreportedfromaroundtheworld.StudieshaveshownthatMarphysaisahighlyspeciosegenuswitheachspeciesoccupyingslightlydifferenthabitats.YetmanycontinuetobedescribedasM.sanguineaeventhoughtheyrepresentdiscretespecieseachwithdifferentecologicalrequirements,whichneedtobeincorporatedintomanagementplans.Alsothissocalledcosmopolitanspeciesiswidelyusedinmanypharmacological,physiologicalandecologicalstudies.Thisspeciescomplexisalsowidelycollectedforbaitandshippedaroundtheworldsoanothergoodreasontoensurethatthecorrectidentificationoccursandwearecertainthatmanyundescribedspeciesstillremaintobedescribed.Withinpolychaetestherearemanyotherexamplesofthistaxonomicconfusion.Sotheuseofappropriateliteratureiscriticalforcorrectidentificationsandtoreinforcethatmanyspeciesstillneedtobedescribedbasedonbothmorphologicalandmoleculardatawithvouchersbeinglodged.ResolvingtheidentitiesoftwocosmopolitanPlatynereisKinberg,1865speciesinSouthAfricaJyothiKara1,AngusH.HMacdonald2,KerrySink3,&CarolASimon11DepartmentofBotanyandZoology,StellenboschUniversity;2SchoolofLifeSciences,UniversityofKwaZulu-Natal;3SouthAfricanNationalBiodiversityInstituteTwocosmopolitanspecies,PlatynereisdumeriliiandP.australis,recordedinSouthAfricawereinvestigatedtodeterminewhethertheyarereciprocallymonophyleticwithnominalspeciesfromFranceandNewZealand,respectively,andtodeterminewhethercharactersusedtodistinguishthemarereliable.Moleculardatasets(mtCOIandnDNA)confirmthatP.dumeriliiandP.australisdonotoccurinSouthAfrica.SpecimensidentifiedasP.australisunexpectedlyclusteredwithP.massiliensis(fromtheMediterranean)whichgeneticdatasuggestedisactuallyindigenoustoSouthAfrica.SinceP.massiliensisispartofacrypticspeciescomplexintheMediterranean,weconsiderthenamedoubtfulandinsteadrefertoit


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asP.massiliensiss.l.Phylogeneticanalysesfurtherrevealedthatthepredefinedmorphologicalgroupings(asP.dumeriliiandP.australis)forthetwoSouthAfricanspeciesdidnotmatchthespeciescladeswith100%accuracy.Thiswasfurtherdemonstratedwhenprincipalcomponentanalysesofthediagnosticcharactersrevealednomorphologicalgroupingssuggestingthatcharactersusedtoidentifythemarenotreliable.Nonetheless,thespeciesdifferintheirtemperaturepreferencesandprobablylarvaldevelopmentmodesasinferredfromtheirdistributionandgeneticstructuringpatterns,respectively.One(nerve)ringtorulethemall–structure-functionrelationshipsinthecopulatoryorganofDinophilusgyrociliatusdwarfmales(Dinophilidae)AlexandraKerbl1,RézaShahidi2,GáspárJékely2,&KatrineWorsaae11MarineBiologicalSection,DepartmentofBiology,UniversityofCopenhagen;2LivingSystemsInstitute,UniversityofExeterConnectomestudies(includingmappingofneurotransmitters)grantauniqueinsightintothemorphologyandfunctionalityofcellsaswellasofentirecircuits.Themajorityofconnectomesstudiedsofararefromlarvalstagesduetosizeandcomplexityofadultnervoussystems,omittingthestudyofcircuitsrelatedto“mature”functions,e.g.reproduction.Weprofiledthe68neuronsofadultDinophilusgyrociliatusdwarfmalesbyannotatingimmunoreactivitypatternsagainstarangeofpan-neuralandspecificneurotransmittermarkersontotheultrastructuralconnectome.Incontrasttofemales,wherethemajorityoftestedneurotransmittersisfoundinthebrainandventralcords,mostimmunoreactivitywasdetectedinthecircumpenialfibremassofdwarfmales.Theseco-localizationpatternssuggestacomplexneuromodulationrelyingonanintricateinterplayoftheneurotransmittersunderlyingtheorchestrationofglandomuscularactivityduringcopulation.PopulationgeneticsoftwoJapanesemaldanidspeciesbasedonmitochondrialDNAandnuclearsinglenucleotidepolymorphismsGenkiKobayashi1,HajimeItoh2,YoshihiroTsunamoto3,ChikaMitsuyuki4,AyumiMatsuo3,YoshihisaSuyama3,WakaSato-Okoshi3,HirokazuAbe3,KimiakiNaiki5,&ShigeakiKojima61KyotoUniversity;2NationalInstituteforEnvironmentalStudies;3TohokuUniversity;4KyushuUniversity;5IwateFisheriesTechnologyCenter;6TheUniversityofTokyoContrastingpatternsofgeneticdiversitywererevealedfortwoJapanesemaldanidspecies,whichdifferinpopulationdynamicsafterthe2011tsunamiandtheirgeographicaldistributions,basedonnucleotidesequencesofthemitochondrialCOIgeneandnuclearsinglenucleotidepolymorphisms,SNPs,analyzedbyMIG-seq.TheCOIanalysisofPraxillellacf.pacificashowedaclearpopulationstructurewithseveralstar-shapedclusterscorrespondingtoitsgeographicaldistribution.Ontheotherhand,ClymenellacollarisshowedauniquepopulationstructureinCOIwithlowhaplotypeandnucleotidediversitiesinIwate,northeasternJapan,thenorthernpartofitsdistribution.ThepopulationstructureofC.collarisinIwatemighthaveformedbytheextensionofthewarmKuroshioCurrentand/orwarmwatermassesduringpastinterglacialperiods.HypomyzostomajasoniSummersandRouse2014(Myzostomida,Myzostomatidae):behavioralpatternsandcolorationinwormsofdifferentagesGlafiraKolbasova1,TatianaNeretina1,&ElenaMekhova21WhiteSeaBiologicalStation,MoscowStateUniversity;2A.N.SevertzovInstituteofEcologyandEvolutionHypomyzostomajasoniisanectocommensalmyzostomeassociatedwithfeatherstarStephanometraindica(Smith1876).Wormsstealfoodfromambulacralgroovesandoccurlocatedonthehost’sarmsandpinnules.OneS.indicaspecimenmaybeinhabitedbyagroupofupto40hypomysostomesofdifferentages.ColorationofH.jasonimatchesthecolorpatternofthehost.Insmallgroups,upto8–10specimensofadultwormsareusuallywhitewith10–11transversedark-brownstrips,andsitonthehostwiththebodyorientedalongthearmofcrinoid,whereasyoungwormsarebrownwithsinglelongitudinalmid-dorsalwhitestrip,andoccuronpinnules.Wormsofmiddlesize,havingsomeintermediatecolorationwithpaletransversestripsandsinglebrightlongitudinalone,occurmostlyonarmsoronlargepinnules.Inlargegroupswithmorethen10–15specimens,H.jasonihavethesametypesofcoloration,butwithoutexactdependenceonbodysize.Bothsmallandlargewormswithonesinglestriparepresent.PerhapsthereasonforthisisthatS.indicaisasmallcrinoidwithasmallnumberofarmsandthinpinnules,therefore,H.jasonihavetocompeteforfeedingplaceswitheachother.Ifforsomereasonawormcannottakeafavorablefoodplaceonthehost'sarm,itmaybeforcedtoremainonthepinnule,and“young”coloringwithasinglelongitudinalstripremainsintheadult.UncoveringthehiddendynamicsinthedevelopmentofciliarybandsinPlatynereisdumeriliiSabrinaKuhl,JörnvonDöhren,&ThomasBartolomaeusInstituteofEvolutionaryBiologyandEcology,RheinischeFriedrich-Wilhelms-UniversitätBonnThespiralianphylumAnnelida,togetherwithMolluscaandpossiblyEntoprocta,belongstoTrochozoa,acladethatischaracterizedbyatypicallarva,thetrochophora.Theeponymousorganofthetrochophoraistheprototroch,apre-oral


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circumferentialbeltofciliatedcells.Confinedtothelarvalstage,itisusedforswimmingandfeedinginthemajorityofpolychaetespecies.Duetoitsstereotypiccelllineageandtransitoryfate,theprototrochhasbeenconsideredhomologousacrossTrochozoa.However,asurveyoftheavailableliteratureshowsthatthenumbersofcellsconstitutingtheprototrochvariesconsiderablybetweendifferentlineages.ToresolvethiscontradictionweinvestigatedthedevelopmentoftheprototrochfromitsformationtoitsdisappearanceinthemodelorganismPlatynereisdumerilii.Theresultofourinvestigationshedlightonthedevelopmentaldynamicsoftheprototrochandtheallegedstereotypyofcellularcompositionofciliatedbands.Newinsightsindiversityofdeep-seaserpulidpolychaetesElenaKupriyanova1,IngoBurghardt1,&GregRouse21AustralianMuseum;2ScrippsInstitutionofOceanographyTheSerpulidaeareunusualpolychaetesthataresessileepifaunalsuspension-feedersconstructingcalcareoustubesonhardsubstrates.Tubesecretionmakestheseanimalsimportantmembersoffoulingcommunitiesandthus,bestknowntaxaarefromshallow-waterhabitats.Serpulidaearealsofoundindeep-seaenvironments,includingtheperipheryofhydrothermalventcommunities.AreviewbyPatersonetal.(2009)reported26serpulidspeciesfromthedepthsbelow2000mworld-wide.Doesthisfigureadequatelyreflecttheknowndiversityofdeep-seaserpulidstenyearslater?Weprovideanupdateonstudiesrevealingundiscovereddiversityofbathyal,abyssalandhadalserpulidsduringthelastdecade.ThepolychaeteassemblagepatternintheseagrasshabitatofSouthAndamanIslands,IndiaRajKiranLakra,JawedEqubal,MuthulingamSavurirajan,KunalSatyam,&ThiruchitrambalamGaneshDepartmentofOceanStudiesandMarineBiology,BrookshabadCampus,PondicherryUniversitySeagrass-bedsareacknowledgedfortheircomplexhabitatandrichbiodiversityaccommodativeness.Inthelightofglobalthreatontheseagrasshabitat,thefaunalcommunity,especiallypolychaetes,hasbeenlessstudiedfromAndamans,whichwasattemptedinthepresentstudy.Samplingwascarriedoutfrom2013-15,coveringdifferenttropical-ecologicalseasonsacrossfiveintertidalseagrassmulti-specieslocations.Atotalof~11,000polychaeteindividualsrepresentedby25familiesand167taxawereidentifiedfromthesedimentsamples(N=540;core15cmdia).Theirdensityrangedbetween316-4857ind/m2withSpionidae(32spp)beingthemostdiversefamily,followedbyCapitellidae(17spp),Syllidae(14spp),andGlyceridae(10spp).Species-wise,Paradonisarmata(26.3%)wasthemostdominantfollowedbyCapitellasingularis(4.8%),Orbiniasp.1(4%),Orbiniasp.2(3.6%)andParaprionospiopinnata(3.5%).Univariatediversityindicesviz.,S,J´,1-λ,ES(n)showedsignificantvariationacrossthelocation,whichwasalsosupportedbymultivariateanalysis.Thesedimentproperties(sand,silt,clay,OM,MGS)andseagrassattributes(percentagecover,shootdensity,aboveground-AG/belowground-BGbiomass)showedasignificantspatialvariationonpolychaetesassemblagewhereas;seasonalvariationwasinsignificant.AccordingtoBEST-BIOENVanalysis,shootdensity,AGbiomass,sandandsiltpercentagebestdefinedthepolychaetecommunitypatterns.TheBGbiomass,percentagecover,OM,sandandsiltshowedasignificantrelationshipwithspeciesdiversity.Overall,thisstudyelucidatesthepolychaeteassemblagefromsouthAndamansseagrasshabitat,whichcouldbeconstructiveforbaselineinsightsandimpactassessment.Nuchalorgansandnavigation:assessingpolychaeteresponsestosubsurfacechemicalcuesSaraLindsay&KatelynHuntSchoolofMarineSciences,UniversityofMainePolychaetesplayakeyroleinmarinebenthicecosystemdynamicsastheyburrowandfeed,mixingsedimentsandinfluencingbenthic-pelagicexchangeofsolutes.Chemoreceptioncoordinatesfeedingbypolychaetesaboveandonthesedimentsurface,butlittleisknownabouthowpolychaetesdetectandrespondtochemicalcuesbelowthesedimentsurface.Weusednovelmethodstoexaminehownuchalorgansmightaidsubsurfacedetectionofchemicalcuesbypolychaetes.Videoobservationssuggestthatburrowingbehaviorsallowpolychaetesto“sniff”porewaterwithnuchalorgans.Resultsfromexperimentsusingtime-lapsephotographyandtime-resolved,digital,particle-imagingvelocimetry(PIV)totracksubsurfacemovementofAlittavirenssupportthehypothesisthatnuchalorgansmediatesubsurfaceresponsestochemicalcues.Whennuchalorganswereblockedwithsuperglue,wormsdidnotrespondtoasubsurfacefoodcueinjectedintothesediment,butintactwormsandwormswiththe3rdchaetigerglueddid.PIVdatarevealedsubtledifferencesinburrowingpathsandspeedforwormsrespondingtosubsurfaceseawaterversussubsurfacefoodcues.


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Atargetedexon-capturephylogenomicapproachtoinvestigatetheevolutionoffunctionaltraitsinChaetopteridae(Annelida)JennaM.Moore1&KarenJ.Osborn21FloridaMuseumofNaturalHistory;2NationalMuseumofNaturalHistory,SmithsonianInstitutionChaetopteridaehavearemarkablytagmatizedbodyplan,withmorphologicalspecializationfordiversemucus-netfilterfeedingstrategiesacrossthefourgenera.RecentphylogenomicanalysesofAnnelidahaverecoveredChaetopteridaeasanearly-diverginglineage.ThecurrentphylogenetichypothesisforChaetopteridaeislimitedbylowtaxonandgenesamplingandpoorsupportatkeynodes.Here,weemployatargetcaptureapproachtobetterresolvethephylogenyofChaetopteridaeandexaminetheevolutionoftagmosisandfunctionaltraitsusingphylogeneticcomparativemethods.Of790targetedregions,604exonlociwererecovered.Thephylogenyishighlycongruentamonganalysisstrategiesandgenerallywell-supported.ThegeneraChaetopterusandMesochaetopterusaremonophyleticsistergroups,andparaphylyisconfirmedinSpiochaetopterusandPhyllochaetopterus.Supertreeanalysesofmorphologicaltraitsshedlightontheevolutionoffeedingmodeandtagmosisinthefamily.TheeuryhalineAlittasuccinea(Annelida;Nereididae)expressesaquaporinwaterchannelsSerenaMucciolo1,CarmelaGissi2,MarikaSalonna2,VivianeProdocimo3,CarolinaArrudadeOliveiraFreire3,MaikonDiDomenico4,MariaMastrodonato5,FrancescoMastrototaro5,PauloDaCunhaLana1,&GiuseppeCalamita21LaboratóriodeBentos,CentrodeEstudosdoMar,UniversidadeFederaldoParana;2DipartimentoDiBioscienze,BiotecnologieEBiofarmaceutica,UniversitàdegliStudidiBariAldoMoro;3LaboratóriodeFisiologiaComparativadaOsmorregulação,UniversidadeFederaldoParaná;4LaboratóriodeModelagemEcológica,CentrodeEstudosdoMar,UniversidadeFederaldoParaná;5DipartimentodiBiologia,UniversitàdegliStudidiBariAldoMoroAquaporins(AQPs)arewidespreadmembranechannelsmediatingthetransportofwaterandsmallsolutesintoandoutofcells.MultipleAQPisoforms,playingvariousfunctions,aredisplayedbyanimalsaccordingtotheirevolutionarypathway.Despitetheirknownbiologicalimportance,fewAQPsareannotatedonlyinafewannelids.InthisworkwehavesearchedforpotentialAQPsinpublicgenomesandtranscriptomesofannelids.Sincemostestuarineannelidsareconsideredosmoconformers,thebrackishwaterspeciesAlittasuccineawaschosenasatarget-speciesforexperimentalAQPssearches.Roughly8putativeAQPparalogswerefound.Moreover,6distinctAQPswereassembledfromA.succineatranscriptomeandacDNAfragmentwasalsoobtainedbydegenerateRT-PCR.Workisinprogresstocloneandassesstheexpressionlevel,bodylocalizationandthepotentialroleofAQPsintheosmoregulationofA.succinea.Novelandvaluableinsightsintoannelidbiologyareanticipated.Whytoburytheheadinthesand?ThefunctionalmorphologyofSternaspisscutata(Sternaspidae)J.Müller,S.Seeck,&T.BartolomaeusInstitutfürEvolutionsbiologieundÖkologie,RheinischeFriedrich-Wilhelms-UniversitätBonnTheanatomyofthesedentary,sediment-feedingpolychaeteSternaspisscutata(Ranzani,1817)differssignificantlyfromthatofotherannelids.Severalmorphologicalcharactersarederived,likeasubdivisionofthebodyintothreepartsorthelackofanyinternalsegmentation.Themostoutstandingcharacter,however,istheventro-caudalcuticularshield,containingferricphosphate.Theshieldaswellastheirsedimentfeedinglifestylehampersstudyingsternaspidswithmethodsotherthanpreparationandhistologyorultrastructureofselectedtissuepieces.ToovercometheserestrictionsweanalysedtheinternalorganisationofSternaspisscutatainaμCTscanner.Theresultsprovidenewinsightsintothefunctionalmorphologyofthisspecies.Theyalsoimproveourunderstandingoftheecologyofsternaspidsandtheirphylogeneticpositionwithinannelids.Whatlimitsthedistributionofthenon-nativeserpulidFicopomatusenigmaticusinCalifornia?AlisonK.Yee,JessicaPeria,&BrunoPernetDepartmentofBiologicalSciences,CaliforniaStateUniversityLongBeachFicopomatusenigmaticushasbeenpresentinSanFranciscoBaysinceatleast1921,butuntiltheearly1990sitwasnotknownfromotherlocationsinCalifornia.Inthepast30years,however,clustersofpopulationshavebeendiscoveredincentralandsouthernCalifornia,tonearlytheUS-Mexicoborder.Despiteitsrecentrangeexpansion,F.enigmaticusisabsentfrommanyapparentlysuitablesitesinthestate.Wetestedthreehypothesesthatmightexplainitslimiteddistribution.1)Larvaehaveashortplanktoniclarvalduration,limitingdispersalfromestablishedpopulations.Larvaerearedwithexcessfoodreachedmetamorphiccompetenceat7and9dayspost-fertilization,atsummer(22°C)andwinter(16°C)temperatures,respectively.AparticledispersalmodelusingROMScurrentdatasuggeststhatlarvaeintheLosAngelesRiverpopulationmayroutinelydisperse10sofkmalongthecoast,especiallyinwinter.2)Larvaecannotsurviveatextremesalinities,limitingtheirdistributiontositesofmoderatesalinity.Acuteexposureexperimentsshowthat(likeadults)larvaesurvivewellacrossaverybroadrangeofsalinites,from3.5-35psu.3)Competentlarvaesettleonlyinresponsetocuesfromadults,limitingtheestablishmentofnewpopulations.Settlementexperimentsshowedthatconspecifictubematerialwasapotentmetamorphic


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cue,butothercommonbiofilmedmaterial(e.g.,tubesofotherserpulidsandtubesofvermetidsnails)alsoinducedmetamorphosis.Asallofourhypothesesseemtobeincorrect,wesuggestsomealternativeexplanationsfortheunexpectedlylimiteddistributionofF.enigmaticusinCalifornia.IntegrativeanatomicalstudyofRamisyllismulticaudatusrevealstheevolutionaryoriginsofitsnovelbodyplanGuillermoPonz-Segrelles1,ChristopherJ.Glasby2,ConradHelm3,PatrickBeckers4,JörgU.Hammel5,RannyeleP.Ribeiro1,ChristianFischer3,ChristophBleidorn3,&M.TeresaAguado31DepartmentodeBiologia(Zoología),FacultaddeCiencias,UniversidadAutónomadeMadrid;2MuseumandArtGalleryoftheNorthernTerritory,Australia;3DepartmentofAnimalEvolutionandBiodiversity,Georg-August-UniversityGöttingen;4InstitutfürEvolutionsbiologieundZooökologie,UniversitätBonn;5Helmholtz-ZentrumGeesthachtEversincethedescriptionofSyllisramosain1885,theexistenceofannelidswithapermanentlybranchedbodyhasbaffledtheannelidcommunity.However,theextremeraritywithwhichtheseanimalshavebeenfoundsince,hasmadeitdifficulttostudytheirbifurcatingbodiesindetail,thuslimitingourunderstandingofhowtheiranatomyandlifehistoryare,andhowtheymayhavearisenduringevolution.Interestingly,therecentdiscoveryofRamisyllismulticaudata,whichalsohassuchbranchedbody,hasmadeitpossibletostudythismostradicalnovelty.Here,wecharacterizetheinneranatomyofR.multicaudatabyusinglifeimaging,histologicalsectioning,3Dimmunohistochemistry,X-raytomography,andSerialBlock-FaceSEMtostudyhowitsbodyplanis,howitismodifiedatthebranchingpoints,andhowthesechangesmightaffectthelifehistoryoftheseuniqueanimals.Bydoingso,weshowthat,althougheachbranchconservesthegeneralannelidscheme,thepresenceofthebranchesthemselvesisanevolutionarynoveltythatcreatesanewbodyplan.Inaddition,wealsostudytheanatomyoftheabnormallybifurcatingposteriorendofanindividualofNudisyllispulligera,andshowthattheobtainedresults,togetherwiththepre-existingknowledgeaboutthedevelopmentandphylogenyofSyllidae,pointtocompetingbutinterestinghypothesesabouttheevolutionaryoriginofthismorphologicalnovelty.TransitionofmetanephridialsystemsintoprotonephridialsystemsinspecieswithreducedcoelomandbloodvascularsystemGünterPurschke,JulianEscher,&LeonardBreitsprecherZoologie,FachbereichBiologie/Chemie,UniversitätOsnabrückAdultannelidsgenerallypossessawell-developedcoelom,bloodvascularsystemandmetanephridiaasistypicalofMetazoa.However,theirlarvaeareacoelomate;excretionandosmoregulationisachievedbymeansofprotonephridialsystems.Duringontogenynephridialsystemsarereplacedbymetanephridialsystemswithoutlossoffunction.WithinAnnelidaseverallineageswithsmallandsometimesinterstitialmembersexistwhicharecharacterizedbyareducedorabsentcoelominadults.Ithasbeenshownthatoneoftheselineages,Protodrilida,mostlikelyevolvedbyminiaturizationratherthanbyprogenesis.Accordingly,membersofthistaxonshowdifferentlevelsofreductionofthebloodvascularsystemandthecoelom.Thus,theyareidealobjectsforstudyingtransitionoftheexcretorysystemswhentheformerstructuresbecomereducedandmaylosepartoftheirfunction.Investigationofexcretorysystemsinallofthefourlineagesrevealedthattwoofthem,namelyPolygordiidaeandSaccocirridaestilldeveloptypicalmetanephridiawhereastheothertwolineages,ProtodrilidaeandProtodriloidae,possessprotonephridia-likeexcretoryorgansalthoughneithercoelomnorbloodvesselsarecompletelylost.Interestingly,onecladepossessesbloodvesselslinedbypodocytesandseparateprotonephridiawithcomplexterminalcellswhereasintheothertheterminalcellsitselfarepartofthebloodvesselsformingcyrtopodocytesthroughwhichtheprimaryurinedirectlyentersthenephridium.Althoughthesetwocladesformsistergroups,themostprobableexplanationforthisdifferenceisthatthistransitionmostlikelyevolvedbyconvergence.Detectionoftheexoticshell-boringspeciesPolydoraonagawaensisonshellfishfarmsinthenortheasternUnitedStatesPaulRawson,SamanthaSilverbrand,&SaraLindsaySchoolofMarineSciences,UniversityofMaineRecentexpansionofthemarineshellfishcultureindustryinthenortheasternUShasledtoincreasingconcernabouttheimpactofshell-boringpolychaetesonshellfishhealthandmarketability.Historically,itwasassumedthatmostinfestationsintheregioninvolvedPolydorawebsteri.Usingmorphologicalandmolecularapproaches,wehaverecentlyidentifiedtwoadditionalspecies,P.neocaecaandP.onagawaensisamongculturedshellfishinMaineandneighboringstates.Nuclear18SrRNAsequenceanalysisindicatesthatP.onagawaensispopulationsinMainearemoregeneticallydiversethanthoseinJapanandChinawherethespecieswasfirstdescribed.Further,geneticdivergenceamongMainepopulationsofP.onagawaensisisanorderofmagnitudehigherthanwehaveobservedforP.websteri,worldwide.Wewilldiscusstheimplicationsofthesefindingswithregardtothehistoryofspeciesintroductionsandpestmanagement.


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Makingheadsandtailsofsyllids:asummaryoftheirregenerativeabilitiesRannyelePassosRibeiro1,BernhardEgger2,GuillermoPonz-Segrelles1,ConradHelm3,ChristophBleidorn3,&M.TeresaAguado1,31UniversidadAutónomadeMadrid,Cantoblanco;2UniversitätInnsbruck;3Georg-August-UniversityGöttingen

Syllids(Syllidae,Annelida)haveremarkableregenerationabilities.Somespeciescanregeneratecompleteindividualsfromshortfragmentsofthebody,i.e.theycanperformwhole-bodyregeneration(WBR);whileotherscaneasilyregeneratethetails,butshowlimitedanteriorregeneration.StudiesoncellulardynamicsandgeneexpressioninsyllidregenerationareveryscarceandnonecoverspeciescapableofWBR.Here,wegathereddataaboutregenerationindifferentspeciesofSyllidae,includingthosethatperformWBR.Ontheonehand,weusedcomparativetranscriptomicstocharacterizeandcomparegeneexpressionprofilesofthreedevelopmentalconditionsinthespeciesSphaerosyllishystrixandSyllisgracilis:anteriorregeneration,posteriorregenerationandnoregeneration(adultsinregulardevelopment).Theobservedgeneexpressionpatternsshowthatposteriorregenerationandregulargrowthareindistinguishable,whileanteriorregenerationinvolvestheup-regulationofseveralgenes.Ontheotherhand,weusedEdUandBrdUlabellingtotrackproliferatingcells(S-phase)duringWBRofSyllissp.,whichisanewspeciesformallybeingdescribed,andthatisabletoregenerateposterioraswellasanteriorends.Ourresultsoncellulardynamicsindicatethatcellsnearthewoundcontributetotheblastemaformationandprobablyundergoaprocessofdedifferentiationandredifferentiationtoformnewtissues.Allinall,ourdataprovidevaluableinformationtounderstandthegeneticandcellularmachineryofWBR,reproduction,growthandsegmentationinsyllids,aswellasannelidsingeneral.

Newscaleworms(Polynoidae,Annelida)fromseeps,ventsandwhalefalls,withatributetothecontributionsofMarianPettiboneGregRouse,AveryHiley,SigridKatz,&JohannaLindgrenScrippsInstitutionofOceanographyMarianPettibonewasresponsibleformanyofthefirstdescriptionsofpolynoidsfromchemosynthetichabitats.Hercontributionsunderliethispresentation.Recentsamplingacrossdeepseahabitatsrangingfrommethaneseeps(Oregon,California,Mexico,CostaRica),whalefalls(California)andhydrothermalvents(JuandeFuca,GulfofCalifornia,EPR,Galapagos)hasresultedinaremarkablediversityofundescribedpolynoidscaleworms.WedemonstratethisviaDNAsequencingandmorphologywithrespecttotherangeofalreadydescribedchemosynthetic-habitatdwellingpolynoids.However,aseriesoftaxonomicproblemscannotberesolveduntilspecimensfromtheirrespectivetypelocalitiesarealsosequenced.Wehighlightsomeoftheresolvedtaxonomicissues,andnewspecies,withrespecttoBathykurila,BranchipolynoeandPeinaleopolynoe.Whilemanyofthescalewormtaxashowwidegeographicrangesacrossthousandsofkilometers,otherswerealsoonlyfoundatonesite.Whilemanywerefoundatbothseepsandwhalefallhabitats,veryfewwerefoundtoliveacrossbothseepsandvents.Tubearchitectureofsand-castlesabellariidwormsfromtheMediterraneanSeaRossanaSanfilippo1,AdrianoGuido2,AgatinoReitano3,GianniInsacco3,&AntoniettaRosso11DepartmentofBiological,GeologicalandEnvironmentalSciences,UniversityofCatania;2DepartmentofBiology,EcologyandEarthSciences,UniversityofCalabria;3MuseoCivicodiStoriaNaturalediComisoBiogenicreefsproducedbyagglutinatesabellariidtube-wormsareunusualmesolittoralandupperinfralittoralbioconstructions.Theyarevaluablemarinehabitatswhichareafocusforprotectionowingtotheirroleinsubstratestabilizationandenhancingbiodiversity.Becauseofthepreciseenvironmentalrequirementsoftheseworms,i.e.roughwatersandsuspendedsandyparticles,sabellariidreefsarerareandlocalizedinrestrictedcoastalareas.SomenewfindingsofSabellariareefsfromthecoastsofSicily(Mediterranean)areherereported.Thestructureoftheagglutinatetubewall,thegluingmodalityofgrains,andthechemicalcompositionofbiocementarealsodescribed.Thetubewallshowsdistinctivelythreelayers,eachofwhichcharacterizedbydifferentparticlessize,shapeandarrangement.ThesedataconfirmthatSabellariaisselectiveinthechoiceofgrains.SEMobservationsofthewallrevealeda“poppedbubble”featureforthebiocement,whichshows,throughEDSanalysis,thepresenceofcalcium,magnesium,andphosphorous.Thebiocementensuresacertainpersistenceofthereefsinthehighhydrodynamicsettingswheretheydevelop,andallowstheirpossiblefossilizationhoweververyunlikely.Fossilrecordisthereforescant,withonlyonesabellariid-richbed,depositedduringtheUpperMioceneofSESpain,inpalaoenvironmentalconditionscomparabletothosewheresabellariidreefspresentlyoccur.


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Sexonthereef:swarmingpolychaetesofTimor-LesteAnjaSchulze1,JoanaZanol2,&ChristopherJ.Glasby31TexasA&MUniversityatGalveston;2NationalMuseum,UniversidadeFederaldoRiodeJaneiro;3MuseumandArtGalleryoftheNorthernTerritory,AustraliaInseveralremotelocationsinTimor-Lesteanannualswarmingof“Meci”wormstakesplace.SimilartothebetterstudiedpalolorisinginSamoa,thewawoandlaorinAmbonorthenyaleinLombok,theMeciwormshavegreatculturalsignificance.WedocumentedtheswarmingonMarch7and8,2018nearthevillageofLoréIinLautémProvinceandsampledbenthicstagesfromalimestonereefsubstrateaswellasswarmingepitokes.OnMarch7,theswarmingstageswerealmostexclusivelyPalolasp.andaremorphologicallysimilartoP.viridisfromSamoa.TheswarmingonMarch8wasdominatedbynereididsbutalsoincludedothereunicids(Eunicesp.,Lysidicesp.),hesionids,phyllodocidsandscalibregmatids,aswellasvariouscrustaceans.TheswarmingEunicesp.showsclosesimilaritytoE.fucata,alsoknownastheAtlanticpalolo.OnlyPalolasp.areconsidered“Meci”wormsandareconsumedraworcooked.Effortstoidentifytheepitokesandmatchthemtothebenthicstagesarecurrentlyongoing.Genomeeditingsheds‘light’onlarvalswimmingbehaviorElaineC.SeaverWhitneyLaboratoryforMarineBioscience,UniversityofFloridaManyannelidsdependuponalarvalphaseoftheirlifecycletolocatesuitableadulthabitat.Eyesoftenprovideinformationaboutlightintensityanddirection,andlightdetectioncaninfluencelarvalswimming,dispersalandsettlementbehaviors.Lightdetectionismediatedbytheopsingenes,whichencodelight-sensitivetransmembraneproteins.LarvaeofthemarineannelidCapitellateletahavesimpleeyespotsandarepositivelyphototactic.WedeterminedtheembryonicoriginofthelarvaleyesinC.teleta,andusedaninfraredlasertodeletetodeletetheeyespotstodemonstratetheroleofeyespotsonthephototacticresponse.Wealsocharacterizedthespatio-temporalexpressionoftherhabdomericopsingenesinC.teletaandshowthatasinglerhabdomericopsingene,Ct-r-opsin1,isexpressedinthelarvalphotoreceptorcells.TodirectlyinvestigatetheroleofCt-r-opsin1,wegeneratedmutantsusingCRISPR/CAS9mutagenesis.InCt-r-opsin1mutants,however,phototaxiswashighlyimpaired,althoughtheeyespotphotoreceptorcellandassociatedpigmentcellformednormally.ThelossofphototaxisduetomutationintheCt-r-opsin1geneisidenticaltothatobservedwhentheentirephotoreceptorandpigmentcellaredeleted,demonstratingthatasingler-opsingeneissufficienttomediatephototaxisinC.teleta.TheseresultsareoneoffewstudiestoutilizeCRISPR/Cas9-mediatedmutagenesistostudyanimalbehavior.EstablishingtaxonomicresearchprioritiesforpolychaetesinsouthernAfricaCarolSimon1,JyothiKara1,DylanClarke2,&SafiyyaSedick31DepartmentofBotanyandZoology,StellenboschUniversity;2MarineBiologySection,IZIKOSouthAfricanMuseum;3AnchorEnvironmentalConsultantsAbout50%ofthe~700speciesofpolychaetesreportedin‘AMonographofthePolychaetaofSouthernAfrica’areconsiderednon-indigenous.Someofthesehavebeenredescribedasnewindigenousspecies,andthismayalsoapplytoothers.Furthermore,manyindigenousspecieshaveunnaturallywidedistributionsthatmaysignalthepresenceofspeciescomplexes.Sinceacompleterevisionofthemonographisnotpracticable,thisstudyaimstoidentifytaxathatshouldbeprioritisedforrevision.Specieswillbeassignedscoresaccordingtocriteriaincludingindigenousstatus,dateandqualityofdescriptions,numberofsubjectivesynonyms,apparentlocalandglobaldistribution,economicvalue,alienstatus,availabilityandreliabilityofgeneticdataandavailabilityofmaterialatIZIKOSouthAfricanMuseum.Taxawillbeprioritisedaccordingtototalandmeanscoreperfamilyandindividualscoreperspecies.PrioritisationoftaxainPartI:Errantiawillbepresented.PhylogenyofTerebelliformia—combiningtranscriptomes,broadsamplingandmorphologyJosefinStiller1,2,VincentRousset1,EkinTilic1,3,FredrikPleijel4,&GregRouse11ScrippsInstitutionofOceanography;2SectionforEcologyandEvolution,DepartmentofBiology,UniversityofCopenhagen;3InstituteofEvolutionaryBiologyandAnimalEcology,UniversityofBonn;4TjärnöMarineLaboratory,DepartmentofMarineSciences,UniversityofGothenburgTerebelliformiaaregloballydistributedannelidswithdiversepalps,branchiaeandchaetae.Theinterpretationoftheevolutionofthesestructuresishamperedbyconflictinghypothesesabouttheirphylogeneticrelationshipsfrommorphologicalandsparsemolecularsequencedata.Here,wetakeathree-partstrategytoinvestigateterebelliformrelationshipsandcharacterevolution.Aphylogenomicdatasetforthemainlineagesfrom21transcriptomesencompassed10,746orthologouslociand3.9millionaminoacids.Theresultingphylogenywasconfidentlysupportedandrobusttodatasubsetting.Thebackbonetreewassupplementedbydensesamplingof121speciesforfivelocitoinvestigaterelationshipswithinthemaingroups,inadditionto90morphologicalcharacterstounderstandthetransformationofkeytraits.Atabroadscale,sixmajorcladesweredelimited:Pectinariidae,Ampharetidae(wasAmpharetinae),Alvinellidae,Trichobranchidae,


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TerebellidaeandMelinnidae(wasMelinninae).ThetraditionalAmpharetidaewasparaphyleticwithAmpharetinaeasthesistergrouptoAlvinellidae,whileMelinninaewasthesistergrouptoTerebellidae.WefurtherfoundPectinariidaeassistertoallotherterebelliformsandTrichobranchidaeassistertoTerebellidaeplusMelinninae.Themoredenselysampled,multi-locusdatasetprovidednoevidencefortheproposedseparationofTelothelepodidae,PolycirridaeandThelepodidaefromTerebellidae.WithinTerebellidae,TelothelepodidaewerepartofThelepodinaeandthemorphologicallysimplePolycirridaegroupedwithinTerebellinae.Terebelliformancestralstateswerereconstructedforbothbranchiaeandchaetae,andsubsequentreductionsoccurredinseverallineages.TherobustphylogenyderivesanewsystematicsystemforTerebelliformiaandenhancesunderstandingoftheevolutionoftheirdiversemorphologies.Phylogenyandlife-historyevolutionofSabellidae(Annelida)EkinTilic1,2,ErfanSayyari3,JosefinStiller1,SiavashMirarab3,&GregRouse11ScrippsInstitutionofOceanography;2InstituteofEvolutionaryBiologyandAnimalEcology,UniversityofBonn;3DepartmentofElectricalandComputerEngineering,UniversityofCaliforniaSanDiegoSabellidaedisplayaplethoraoflife-historystrategiesandawiderangeofbodysizesmakingtheirbiologyfascinatingtostudyinaphylogeneticcontext.However,thephylogenyofSabellidaeremainspoorlyunderstood,withthelittleavailablemolecularsequencedataconflictingwithpreviousmorphology-basedstudies.Wepresenttheresultsofourphylogenomicanalyseswith17newsabellidtranscriptomes,andatargetedexoncaptureanalysis,wherewesequencedover500exonsforca.100additionalsabellidspecies.Wealsoconductedathoroughmethodologicalanalysiscomparingspeciestreereconstructionfromgenetrees(ASTRAL)andconcatenatedanalyses.Thenewandrobustsabellidphylogenywillnotonlyallowthenecessarytaxonomicrevisionofthisgroup,butalsoprovidesatooltoexploretheevolutionofthediverselife-historystrategies,bodysizeandmorphologywithinSabellidae.Histriobdellahomari(Beneden1858),Histriobdellidae:finestructureofventralpharynxandjawsAlexanderTzetlin1,NataliaBudaeva2,ElenaVortsepneva1,&ConradHelm31M.V.LomonosovMoscowStateUniversity;2DepartmentofNaturalHistory,UniversityMuseumofBergen,UniversityofBergen;3Georg-August-UniversityGöttingenThefinestructureofthejawapparatusandtheventralpharyngealorganinHistriobdellahomari-atinyectocommensalknownfromlobsters-hasbeenstudiedbyusingroutinemorphologicaltools(SEM,TEM,CLSM).TheHistriobdellajawultrastructureishighlycomparabletothoseofDorvilleidaeandjuvenilejawsofOnuphidae,andrepresentsasclerotizedcuticle.Intheprocessofdevelopmentofthemaxillaryapparatus,mandibles,maxillaeIIandunpaireddorsalcarriersareformedfirst,andlatertheremainingmaxillaeandtransversecarriersappear.Notably,thegeneralstructureofthehistriobdellidmaxillaryapparatusresemblestheconditionsknownforOenonidae.Thepharyngealmuscularapparatusdiffers-notonlyduetotheverysmallsizeofHistriobdella,butalsobecausethehistriobdellidmaxillaryprotractionoccursduetostraighteningofthedorsalcarriers(dorsalrod)andthusrequiresadifferingmuscularscaffold.Basedonourinvestigations,thegeneralmuscularapparatusofthejawsandventralpharyngealorganisunique.Atthesametime,ourultrastructuraldata(TEM)showthatthemaincomponentsoftheHistriobdellamuscularsystemfitintothegeneralschemeoftheventralpharyngealorganinannelids.Nevertheless,ourdataprovidenewinsightshelpingtounderstandtheevolutionofeunicidjawsingeneral.TheroleoftemperatureandphotoperiodinregulatingoocytegrowthofthepolychaeteHedistediversicolorHaiqingWang1,2,AndreasHagemann2,MarianneUhre1,ArneMalzahn2,AleksanderHandå2,&KjellIngeReitan11NorwegianUniversityofScienceandTechnology,DepartmentofBiology;2SINTEFOcean,NorwayExperimentswereconductedtotesttheeffectofexternalfactorsphotoperiodandtemperatureonoocytedevelopmentofthepolychaetewormHedistediversicolor,aimtofind(1)theinfluenceofanacceleratedphotoperiodtransition(2.5timesfast-forward)onreproductivedevelopment,(2)effectoftemperatureonoocytematuration,and(3)combinedeffectsofphotoperiodandtemperatureonoocytegrowth.Experiment1:Wormswerecultivatedataconstanttemperature(8°C)withmimicked(MP)orsped-up(SP)photoperiodslasting118and46days,respectively.Experiment2:Toassesstheeffectoftemperatureonoocytematuration,wormswerecollectedinMarchandkeptinthelabatlow(2°C,"LT")andhigh(8°C,"HT")temperatures.InExperiment1andExperiment2,treatmentswerecomparedtofieldsamplingsfromnaturalpopulationsoncoincidingdaylengths(NP).Experiment3:Wormswerecultivatedover85datlongdaylength(16L:8D)atconstanttemperature(16°C,"ThPh"),orlongdaylengthatdecreasingtemperatures(13to7°C,"TlPh"),shortdaylength(8L:16D)atconstanttemperature(16°C,"ThPl"),andshortdaylengthatdecreasingtemperatures("TlPl").Experiment1:TheresultsshowedthattheoocytesintheSPtreatmentmaturedsignificantlylessthantheoocytesintheMPandNPtreatment.Experiment2:Hightemperaturewasfoundtohavepositiveeffectsonoocytematuration.Thesizeofmaturatedoocyteswas196.34±3.75μm.Experiment3:Oocytegrowthwasfastestatshortdaylengthsanddecreasingtemperatures(TlPl),andlowestatconstanttemperatureandlongdaylength(ThPh).


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Molecularandmorphologicalplacementofanenigmaticdeep-seataxon(Chrysopetalidae:Annelida)instigatesdeeperinvestigationintochrysopetalidplesiomorphicnotochaetalformsCharlotteWatson1,EkinTilic2,&GregRouse21Museum&ArtGalleryoftheNorthernTerritory,Australia;2ScrippsInstituteofOceanographyChrysopetalidaesubfamiliesarecharacterizedbytheirinternallycamerateddorsalchaetalscleritome.Chrysopetalinaearethepaleateforms;Dysponetinaeandfree-livingCalamyzinaearespinoseforms,symbioticCalamyzinaelacknotochaetae.Rarely,paleatechaetaeoccurindysponetinsandminorspinosechaetaeinchrysopetalins;recentlyunusualnotochaetaeweredescribedforasymbiontcalamyzin.Whichchaetaltyperepresentstheplesiomorphiccondition?AnewchrysopetalidtaxonwasfoundatmethaneseepsoffCostaRicawithamorphologyaligningitwithintheChrysopetalinae:robustbodyform,jaws,caruncleandpetaloidpalealnotochaetae.However,multigenephylogeneticsplacethenewgenusassistertoDysponetinae.Thisrendersthetransformationofchaetalformsinchrysopetalidsasmoreproblematicalandthisissueisexploredhere.AnewperspectiveonaggregationandaggregativesettlementofSpirobranchuscariniferus(Gray1843)(Serpulida)RobertPaulWolfVictoriaUniversityCoastalEcologicalLaboratoryAggregativesettlementofserpulidlarvaeisoftendiscussedasaresponsetothepresenceofamicrobiologicalfilmandconspecifics.MystudiesshowedthatrecruitsofSpirobranchuscariniferussettledaggregatively,butthiswasnotinresponsetoadultconspecifics.Larvaeofserpulidspeciesaggregatednearthepointofsettlementbeforetheyfinallyattached.Abioticfactorssuchassunlight,waveactionandtidalmovementhadamoresubstantialimpactonsettlementthanthepresenceofadultsofthesamespecies.Theappearanceofsolitarysettledindividualscanbeinterpretedasaconsequenceofenvironmentalconditions,ratherthanlarvaechoice.ThereappearstobenodifferencebetweenasolitaryandaggregativesettledspecimenofS.cariniferus.Howeversolitarywormsseemtofocustheirenergyontubegrowthcomparedtotheiraggregativeconspecifics.Thebroadestdistribution,thetiniestmales,thesmallestgenome–goingforarecord,Dinos?K.Worsaae1,A.Kerbl1,B.C.Gonzalez1,2,F.Marlétaz3,A.Hejnol4,&J.M.MartinDuran4,51UniversityofCopenhagen;2SmithsonianInstitution;3UniversityofOxford;4UniversityofBergen;5QueenMaryUniversityofLondonDinophilidaelackappendages,parapodiaandchaetaeandinsteadmovetheirsixsegmentlong,microscopicbodiesbyciliarymotion.Itsthreedefinedgeneraeachshowdistinctlifecycles.MembersofTrilobodrilusandDinophilus(sensustricto)aremonomorphicandthelatterpresentaprolongedlifecyclewithanencystmentstage,helpingthemtosustain,e.g.Arcticwinters.ThismayexplainourpopulationgeneticfindingofaborealdistributionofD.vorticoides;suchadistributionisparadoxicallyandexceptionallybroadforameiofaunalspecies.SpeciesofDimorphilusnov.gen.showextremedimorphismwithD.gyrociliatushavinga50μmlongdwarfmalecomprisingaround360cells,including68neurons.ItalsopossessesoneofthesmallestandmostcompactgenomesinSpiraliawithreducedintronsandrepetitiveelements,yetconservedarchitecture.Thisisanewreductivepathway,whichmayreflectthefamily’sevolutionaryminiaturizationfromamacrofaunalancestorassupportedbyitsderivedpositionwithinAnnelida.

Abstracts:PosterPresentations

38

Abstracts:PosterPresentationsPresentationsarelistedalphabeticallybypresenterlastname.1)Molecularevidencefortheexistanceofcrypticspecieswithinthepolychaetewormsknownas‘Iwa-mushi’inJapan(Annelida:Eunicidae:Marphysa)HirokazuAbe1,MasaatsuTanaka2,MasanoriTaru3,SatoshiAbe3,&AtsukoNishigaki31IwateMedicalUniversity;2KagoshimaUniversity;3TohoUniversityAmolecularstudywasconductedtoclarifyhowgeneticallyhomogeneousthecommonJapanesespeciesofMarphysaknownas‘Iwa-mushi’is.‘Iwa-mushi’iswellknownasausefulfishingbaitandwasfirstdescribedasMarphysaiwamushiIzuka,1907,andlatersynonymizedtoM.sanguinea(Montagu,1813).ThenucleotidesequencesofnuclearandmitochondrialgeneswerecomparedamongspecimensnewlycollectedinJapanandDDBJ/ENA/GenBankdataforcongenericspecies.OurresultsshowedthattheJapanese‘Iwa-mushi’couldbedividedintofiveundeterminedspecies.ItisunknownwhichofthefiveundeterminedspeciescorrespondstoM.iwamushi.OurresultsalsosuggestthehypothesisthatoneofthesespeciesmaybeanalienspeciesintroducedtoJapanviaimportedlivefishingbait,andthatanotherspecieshavebeenintroducedtoFranceviaoystertransplantationfromJapan.WeconsideredthatthereiscurrentlynoevidencetosupportthepresenceofM.sanguineainJapan.2)Anovelsymbioticrelationshipbetweenascidiansandanundescribedtunicboringpolychaete(Annelida:Spionidae:Polydora)HirokazuAbe1,KazuyukiYamada2,OsamuHoshino3,TetsuyaOgino4,ShunKawaida5,&WakaSato-Okoshi61IwateMedicalUniversity;2Freelancebenthicworker;3DivingServiceChap;4KyotoUniversity;5ShimaneUniversity;6TohokuUniversityPolychaete-ascidiansymbioticrelationshipsarerareandonlyknownforafewsyllidspecies.WereportonanovelsymbioticrelationshipbetweenascidiansandanundescribedPolydoraspecies,whichwasfoundinthetunicsofthesessilesolitaryascidiansonsubtidalrockyshoreofIzu-OshimaIslandinJapan.AnatomicalandMicro-CTexaminationoftheascidiansshowedthatthePolydoraindividualsboreintothecellulosicascidiantunicsandconstructU-shapedburrowinasimilarwaytomanyotherPolydoraspecieswhichshowshell-boringlifestyle.MostindividualsofthePolydoraspeciesopentheirtubesnearsiphonsofascidians.Itwasconsideredthattheyobtainfoodbykleptoparasitismagainsttoascidiansfilter-feedingactivities.Furthermore,cellulaseactivitiesinthePolydoraindividualsweredetectedbybothplateassayandzymography,suggestingthehypothesisthatpotentialcellulosedigestionabilitiesenablethemtoboreintothecellulose-richascidiantunics.3)TemporalfunctionalchangesinpolychaetesfromthenorthwesterncoastofBajaCalifornia,MexicoA.Alvarez-Aguilar1,L.V.Rodríguez-Villanueva2,J.V.Macías-Zamora1,N.Ramírez-Álvarez1,&F.A.Hernández-Gúzman11FacultaddeCienciasMarinas,InstitutodeInvestigacionesOceanológicas,UniversidadAutónomadeBajaCalifornia;2MarineBiologyLaboratory,PublicUtilitiesDepartmentCityofSanDiegoOceanMonitoringProgramWeanalyzedthefunctionalchangesofthesoftbottompolychaetecommunityatleveloffamilyinnorthwestcoastofBajaCalifornia,Mexico,throughtheuseofBiologicalTraitsAnalysis(BTA).Atotalof229benthicstationswerecollectedalongaregional-scaleareacovering120kmoffthecoastinthreesamplingcampaigns:1998,2003and2013.ThesampleswerecollectedusingaVanVeengrab(0.1m2)atdepthsrangingbetween15-200m.Atotalof58,810polychaetousrepresenting44familieswereidentified.Afirstapproachshowedthatsuspensionandsurfacedepositfeedersrepresented55-65%offaunain1998and2003andincreasingto85%in2013,especiallynearwastewaterdischarges.Thethirdmostimportantfeedingmodemostimportantwassubsurfacedepositwithacontributionof15%in1998and2003butonly5%in2013.Weconcludedthattheregionalspatio-temporalchangesinpolychaetecommunitypatternsmaybeaffectedbylocaldischargesofwastewater,regionaloceanographicprocesses(ElNiñoevents),andanextendeddrought.4)SpatialdistributionofCirratulidaeanditsrelationshipwithenvironmentalvariablesonthewestcoastofTijuana-Ensenada,BajaCaliforniaMexicoA.Alvarez-Aguilar1,L.V.Rodríguez-Villanueva2,J.V.Macías-Zamora1,N.Ramírez-Álvarez1,&F.A.Hernández-Gúzman11FacultaddeCienciasMarinas,InstitutodeInvestigacionesOceanológicas,UniversidadAutónomadeBajaCalifornia;2MarineBiologyLaboratory,PublicUtilitiesDepartmentCityofSanDiegoOceanMonitoringProgramIndustrialeffluents,municipalwastewaterdischargesandagriculturalrunoffsmaycontainsignificantamountsofpollutingsubstancesthatcandegradetheenvironmentandalterthestructureofbenthiccommunitiesinnearbyoradjacentzonesofinfluence.OnthecontinentalshelfofTijuana-Ensenada,thespecificcomposition,abundanceanddistributionpatternsofthepolychaeteannelidcommunityoftheFamilyCirratulidaewereevaluatedandanalyzedtodetermineifthereisevidenceof


39environmentalimpactgeneratedbythenearbywastewaterdischargestothestudyarea.InOctober2013sampleswerecollectedusingaVanVeengrab(0.1m2)in75stationsatdepthsfrom14.5to208m.Environmentalvariablesmeasuredwere:salinity,temperature,grainsize(%<63μm),organiccarbon,metalconcentrations(Cd,Co,Cr,Cu,Ni,Mn,Ni,Zn,Fe),andorganiccompounds(polybromodiphenylethers:PBDES)inthesediment.Weidentified1253polychaeteannelidsofthefamilyCirratulidaerepresentedby5generaand22species.ThespeciesthatdominatedthecommunitystructurewithhigherabundanceswereChaetozonehartmanae21.7%(266orgs.),Monticellinacryptica21.6%(265orgs.)andMonticellinasiblina20.2%(248orgs.).Agreaterabundanceofcirratulidswasobservedinthesouthernareaofthestudyarea,whilethediversityofcirratulidsingeneralwaslowinmostofthestudyarea(H'<2),however,itreachedhighervalues(nearaH'=3)mainlyinareasdistantfromthedischargesoftheBinacionalandPuntaBanderawastewatertreatmentplants,aswellastheEsterodelRíoTijuana.ThemultivariateanalysisBio-Envshowedthatthevariablesthatbestexplainedtheobservedbioticpatternweresalinity,grainsize,andCu,Fe,ZnandΣPBDEs.5)Ampharetidae(Annelida)fromdeepNordicSeasTomAlvestad,NataliyaBudaeva,KatrineKongshavn,&JonAndersKongsrudUniversityMuseumofBergenThepresentstudyisbasedonmaterialfromepibenthicandinfaunalsamplescollectedduringscientificcruisesintheperiod1981‒2018todifferentpartsoftheNordicSeas,andonmaterialfromenvironmentalmonitoringattheshelfbreakoffwesternNorway.Theinvestigatedlocalitiescoveradepthrangefrom500to4000m.MostofthesamplesweretakenintheNorwegianSea,andsomearefromtheIcelandSeaandfromthemarginbetweentheNorwegianSeaandtheGreenlandSea.Thematerialincludedabout10000specimensofampharetidsfrom150stations.Atotalof12specieshavebeenidentified.TwospeciesofAmphareteandonespeciesofAnobothrusaredescribedasnewtoscience.Anobothruslaubieriisredescribed.DNAbarcodesareprovidedformostofthespecies.

BiodiversityofpolychaetousannelidsinBahíadeTodosSantos,BajaCalifornia,México.6)OsmarAraujo-Leyva1,VerónicaRodríguez-Villanueva2,&VinicioMacíasZamora11InstitutodeInvestigacionesOcenológicas,UniversidadAutónomadeBajaCalifornia;2MarineBiologyLaboratory,CityofSanDiegoPublicUtilitiesTheaimofthisstudywastodescribeandanalyzethestructure,distribution,andtemporalvariationinthecompositionofbenthicpolychaetaandtheirrelationtoabioticcharacteristicsinmarinesedimentsalongthecontinentalshelfofBahiadeTodosSantos,BajaCalifornia,Mexico.Benthicmacrofaunaandenvironmentalvariableswerecollectedat19stationsinSeptember1998(“BIGHT98”),15stationsinDecember2013(“BIGHT13”)and16stationsinSeptember2018(“BIGHT18”).Thesedatawerecomparedtoassesstheresponseofbenthicpolychaeteassemblagestonaturalandhumaninducedchangesinsedimentcharacteristics.AllstationsweresampledusingaVanVeengrab(0.1m2)atdepthsbetween15to206m.Siteswereselectedusinga“multipledensitynestedrandom-tessellationstratifieddesign”.Thismethodisbasedonarandomstratifieddesignthatconsidered3strata:depth,continentalplatformamplitude,andproximitytopotentialsourcesofanthropogenicimpact.Environmentalparametersmeasuredweredepth(m),sedimentgrainsize<63µm(%),organiccarbon(%),andmetals:Co(µg/g),Cr(µg/g),Cu(µg/g),Fe(µg/g),Mn(µg/g),Ni(µg/g),Pb(µg/g),andZn(µg/g).Atotalof12,244polychaetousannelidswereidentifiedin42families.NumericallydominantfamilieswereSpionidae(1949org./0.1m2),Chaetopteridae(1792org./0.1m2),Maldanidae(651org./0.1m2),Cirratulidae(577org./0.1m2),Onuphidae(445org./0.1m2),Ampharetidae(119org./0.1m2).Thebestrepresentedfamiliesin1998wereSpionidae(310org./0.1m2),Maldanidae(150org./0.1m2),Ampharetidae(119org./0.1m2)andCirratulidae(110org./0.1m2).In2003theywereSpionidae(733org./0.1m2),Maldanidae(501org./0.1m2),Cirratulidae(467org./0.1m2)andOnuphidae(7443org./0.1m2)butin2013theywereChaetopteridae(1792org./0.1m2)andSpionidae(906org./0.1m2).

Livinginanalga:apreliminarycomparisonoforganismsassociatedwithshallow-waterredalgaefromAntarcticaand7)theMediterraneanJúliaSardà-Avila1,RafaelSardà2,&ConxitaAvila11UniversityofBarcelona;2CEAB-CSICShallow-watermarinebenthicalgalcommunitiesusuallyharborextremelyhighdensitiesoforganismsthatmayplayessentialrolesinnutrientandenergyflow,aswellasintheecologyofthealgae.InAntarctica,thesecommunitieshavebeenscarcelystudiedsofar,andwhentheyareanalyzed,thisisdoneforafewtaxonomicalgroupsseparately,thusmissingtheoverallperspectiveofthewholecommunities.OurstudyintendstodescribethenearshoreAntarcticPeninsularbenthiccommunitylivingintheredalgaGymnogongrusturquetti,andtocomparetheresultstoanecologicallysimilaralga,SphaerococcuscoronopifoliusfromtheMediterranean;bothalgaebelongtotheClassFlorideophyceae,OrderGigartinales.Samplesofthesetwospecieswereinvestigatedinordertoestablishaninventoryanddetermineabundance,speciesrichness,diversity,andsizeoftheorganisms.


40Livinginasponge:apreliminarystudyofthefaunaassociatedwiththeAntarcticspongeKirkpatrickiavariolosa8)

ConxitaAvila1,EduardGiralt1,JoãoGil2,RafaelSardà3,CarlosAngulo-Preckler11UniversityofBarcelona;2CCMAR;3CEAB-CSICTheparticularfeaturesofPortFoster’scalderaonDeceptionIsland(Antarctica)areaninterestingsubjectofstudybecauseofitssoftandhardsubstratesanditspeculiarvolcanicfeatures.Antarcticbenthiccommunitiesherearestillpoorlyknown,particularlythecommunitiesofsmall-sizedinvertebrateslivingassociatedtootherorganisms,suchassponges.WestudiedherethefaunaassociatedtotheAntarcticspongeKirkpatrickiavariolosainhabitingtherockysubstratesofFildesPoint,Whaler'sBayatashallowdepth(5-15m).Thisspongeischaracterizedbybeingmassiveandintenselyred,withasizeupto30cminheight.Inordertodothis,foursamplesofthespongewereobtainedbySCUBAtoseparateandidentifytheorganismsinhabitingthem.Atotalof15,222specimenswerefound,mostofthembetween1to3mm.

MolecularstudyofChaetozone(Annelida,Cirratulidae)revealshiddendiversityincommonbenthicpolychaetes9)MaëlGrosse1,MariaCapa1,2,JonA.Kongsrud3,ArneNygren4,&TorkildBakken11NorwegianUniversityofScienceandTechnology,NTNUUniversityMuseum;2UniversityoftheBalearicIsland,DepartmentofBiology;3DepartmentofNaturalHistory,UniversityMuseumofBergen;4DepartmentofMarineSciences,UniversityofGothenburgThepolychaetesofCirratulidaearecommoninoffshorebenthicsedimentsandconsideredasanimportantgroupinenvironmentalmonitoring.Amongstthem,thegenusChaetozoneisthemostspecies-diverseworldwide.SevenspeciesofChaetozonehavebeenrecordedinNorway,althoughtheserecordsshouldbeconsideredcautiouslyasspeciesdelineationischallengingfrommorphology.Intotal306specimensfromNorwegianandadjacentwaterswereDNAsequencedwiththeuniversalmitochondrialbarcodingregionCOI,andD1-D2regionsofthenuclear28SrDNA,anddatasetsinvestigatedwithphylogeneticandspeciesdelimitationanalysessuchasABGD,mPTPandGMYC.Thesemolecularanalyseswereusedasaframetore-examinethemorphologicaldiagnosticfeaturesofeachofthespecies.Over130newCOIbarcodesareobtained,andatotalof16speciesarerecoveredintheanalyses.TheseincludespecimensofChaetozonesetosafromthetypelocality,anditsdistributionisconfirmedtobelimitedtoArcticwaters.Thisisafirstmolecularapproachtostudyspeciesdelineation,evolutionaryrelationshipsandgeographicstructureofmembersofChaetozone,agenuswhichtaxonomyhasproventobedifficult.ItprovidesatoolforbothmolecularandmorphologicalidentificationanddemonstratestheunderestimateddiversityofChaetozoneintheNortheastAtlantic.Thisstudymayindicatewhatshouldbeexpectedintermsofdiversityofcirratulidsinothergeographicregions,andfurtheremphasisethetaxonomicchallengesinthisgroup.10)AnewdeepseaspeciesofChloeia(Annelida:Amphinomidae)fromapockmarkfieldofsouthwesternAtlanticRômuloBarroso1,JerryD.Kudenov2,VictorSeixas3,OrlemirCarrerette4,MauricioShimabukuro4,PauloSumida4,&PauloPaiva31UniversidadeFederalRuraldoRiodeJaneiro;2UniversityofAlaskaAnchorage;3UniversidadeFederaldoRiodeJaneiro;4InstitutoOceanográficodaUniversidadedeSãoPauloPockmarksarecraters-likedepressionsinseabedcommonlyfoundalongcontinentalmarginsthataregenerallyassociatedtoepisodicgas/fluidseepage.Themaingasseepageisusuallymethane,whichmaystimulateandincreaselocalbenthicproductionthroughabacteria-basedfoodweb.Recently,awidepockmarkfield,associatedtothesalt-diapirismprocesswasreportedalongtheupperslopeofthesoutheasternBrazilianmargin.InthisstudywedescribeanewspeciesofChloeia(Amphinomidae)fromthispockmarkfieldaround750mdepth.OurnewspeciesissimilartoC.violaceaandC.kudenoviinthatthelongestneuropodialcirrioccuronthesecondchaetiger.However,dorsalsurfacesoneachsegmentofthenewChloeiaspecieshostananteriorarcofpigment,incontrasttoC.kudenovi,whichtotallylackspigmentation,andC.violacea,inwhichpigmentationoccursonlyalongtheposteriorregionofeachchaetiger.Thewell-developedprostomialeyesalsodistinguishedthenewspeciesfromtheotherones.Thenewspeciesshowsanontogeneticvariationinthebifurcateneuropodialchaetaeinthatinnersurfacesofthelongprongsweredentateinjuveniles,andcompletelysmoothinadults;thedifferencemayreflecttheretentionoflarvalfeaturesinthesmallerworms.ThegenusChloeiaisgenerallymorediverseandabundantinshallowwaters,with21recognizedspecies,anduptodate,only4arereportedtodeepwaters.Thedescriptionofthisnewspeciesincreasesourknowledgeofthebiodiversityinpockmarkareas,andaddstothediversityoftheCholeiaindeep-seaenvironment.

AnewspeciesofAtherospio(Polychaeta,Spionidae)fromadeep-watercontinentalslopesiteoffTurkeyintheeastern11)MediterraneanSeaJamesA.Blake1&PatriciaA.Ramey-Balci21AquaticResearch&Consulting;2KoçUniversityAnewspionidpolychaetebelongingtothegenusAtherospioMackie&Duff,1986hasbeendiscoveredindeep-seasedimentsintheeasternMediterraneanSeaaspartofanexpeditionbytheOceanExplorationTrust.Specimenswerecollectedfrom


41theE/VNautilusinAugust2012offTurkey,atadepthof2216montheAnaximanderSeamountattheAmsterdammudvolcanosite.Coresweretakenfromsedimentscoveredwithmicrobialmats.ThisnewspeciesisassignedtoAtherospiobecauseithasmodifiedneurosetaeinsomeanteriorsetigersandthebranchiaetransitionfrombeingsimple,cirriformandfreefromthenotopodiainanteriorsetigerstobeingbroad,flattenedandfusedtothedorsallamellaeinmiddleandposteriorsetigers.Thespeciesisunusualinhaving:(1)areduced,uniramoussetiger1;(2)well-developedpre-andpostsetallamellaethatencompasstheneurosetaeandnotosetae;(3)notopodiallamellaefusedwiththebranchiaeinmiddleandposteriorsegments;(4)unusualunidentatehoodedhooksinbothnoto-andneuropodia;(5)modifiedspinesinneuropodiaofsetigers4–10thathaveaprominentbristledaristateapex;(6)apygidiumthatbearsanelongateterminalcirrusandtwolonglateralcirri.Thetwopreviouslydescribedspeciesarefromshallow-waterdepths.ThenewspeciesisthefirstAtherospiofromthedeep-seaandassociatedwithacoldseephabitat.

Meiodorvillea(Dorvilleidae)newtotaxonomicandphyllogeneticperspectives12)RafaeldeO.Bonaldo,TatianaM.Steiner,AndréR.S.Garraffoni,&AntoniaC.Z.AmaralInstitutodeBiologia,UniversidadeEstadualdeCampinasAnimportantcollectionofDorvilleidaeisdepositedattheMuseumofZoology,InstitutodeBiologia,UniversidadeEstadualdeCampinas(ZUEC-POL),withmorethan5000specimenscollectedinSouthwestAtlanticOcean.Thiscollectionhasabout40differentmorphotypescollectedinbeachesanddepthsof12upto3300meters,mainlycomingfromthreelargeprojectscarriedoutinBrazil,Revizee(EvaluationofthelivingresourcesoftheExclusiveEconomicZone),Habitats,andAmbes(Environmentalcharacterizationfromcontinentalshelftodeepregions).ThisfamilyispoorlystudiedinBrazilandhasonlyninerecordedspecies.Meiodorvilleaisalittleknownworldwidegenus,withonlytwospeciesdescribed,M.minuta(Hartman,1965)andM.apalpataJumars,1974.Arigorousanalysisofthespecimensofthiscollectionhasrevealedfournewspeciesandimportantnewmorphologicalstatesmainlyaboutsetae,bodyappendagesandjawapparatus.Accordingtotheliterature,thephylogenyofDorvilleidaeisstilluncertainshowingthatMeiodorvilleaismorphologicallyrelatedtoMarycarmenia,Protodorvillea,Dorvillea,Pettiboneia,Eliberidens,Gymondorvillea,andSchistomeringos.Thisresearchaimstosearchforsynapomorphiesandreconstructtheancestralstateofthecharacters,basedonthenewmorphologicalfindingsofMeiodorvillea,togetherwiththesupportofthespecificliteratureandtheexaminationoftypematerialofthegeneramentionedabove.Support:FAPESP2018/13244-9;2018/10313-0.

PhylogeographyofAglaophamusmalmgreni(Nephtyidae)intheArcticandnortheasternAtlantic13)PolinaBorisova1,NataliyaBudaeva2,&TomAlvestad21P.P.ShirshovInstituteofOceanology,RussianAcademyofSciences;2DepartmentofNaturalHistory,UniversityMuseumofBergen,UniversityofBergenAglaophamusmalmgreniisawidelydistributedannelidspeciesintheNorthernHemisphere.AfragmentofCOIwassequencedin98specimensofA.malmgreniobtainedfromtheLaptevSea,theKaraSea,theBarentsSeaandtheNorwegianSea.TwelvemoresequenceswereobtainedfromGenBankandBOLDincludingrecordsfromtheCanadianArctic.Fourmaingroupswith3-6%p-distancewerefoundintheanalysis:twodeepcladesintheNorwegian(900-1600m)andtheLaptev(2000-3000m)seas,onewidelyspreadArcto-Atlanticeurybathic(60-1200m)clade,andasingledivergentsequencefromthedeepLaptevSea.HaplotypediversityintheArctic-Atlanticcladewasveryhighdemonstratingalackofclearseparationamongpopulations.Thehaplotypeswerewelldispersedacrossallstudysiteswithnocleargeographicalofbathymetricalstructureobserved.14)SpeciesdelineationofSabellastarte(Sabellidae:Polychaeta)aroundtheArabianPenensulausingmorphometricsandDNAbarcodingShannonD.Brown1,KatherineRowe1,LauraGajdzik1,JohnA.Burt2,AlyssaMarshell3,GustavPaulay4,&MichaelL.Berumen11KingAbdullahUniversityofScienceandTechnology;2NewYorkUniversityAbuDhabi;3SultanQaboosUniversity;4UniversityofFlorida,FloridaNaturalHistoryMuseumMorphometricsisusedtoidentifyanddelineatespecies.SuchanalyseshavebeenusedtodescribetheeightspeciesoftheSabellastartespp.(Sabellidae),whichareconspicuousmembersofthebenthosfromtropicalandtemperatewaters.However,certainmorphologicalfeaturescanbesimilaramongspeciesandevenchangeduringdevelopment,growth,andregeneration.ItwasthereforesuggestedtoaddgeneticinformationtofurthervalidatethedifferentspeciesofSabellastarte.StudiesutilizingbothmorphologicalandgenetictechniqueshavebeenlimitedintheArabianPeninsula.Todate,thesestudieshaveledtotheidentificationofonespeciesintheRedSea(S.sanctijosephi)andasecond(S.spectabilis)intheArabianSeaandGulf.Ourstudyaimedtofillthisgapbysimultaneouslyusingtwomolecularmarkers(16sandCO1)andpredeterminedmorphologicalcharacteristics(e.g.,branchialcrownappendages,abdominalfeatures)todelineatetheSabellastartespp.intheArabianPeninsula.Oursamplescomprisearound100specimensfromtheSaudicoastlineoftheRedSea,theGulfofOman,andtheArabianGulf.Inadditiontomorphologicalandgeneticdata,werecordedenvironmentaland


42biologicalinformationtofurtherinformabouttheecologyanddistributionpatternsoftheSabellastartespecies.OurpreliminaryresultssuggestthepresenceofatleastonemorphospeciesintheRedSeaandtwomorphospeciesintheGulfOmanthatvaryinthecolorandnumberofradiolesaswellashabitatsubstrate.Thesedifferencesarepotentiallydrivenbythelocalandregionalvariationinenvironmentalandoceanographicconditions.15)NaturalradioledamageandregenerationofthefeatherdusterwormSchizobranchiainsignisShannonD.Brown1,2&RichardB.Emlet11OregonInstituteofMarineBiology;2KingAbdullahUniversityofScienceandTechnologyThefeatherdusterworm,Schizobranchiainsignis,isanabundantmarineinvertebratefoundinthesubtidalandlowintertidalofthenortheasternPacificOcean.Whilepreviousresearchhasexaminedtheregenerationoftheentireposteriorandanteriorregionoftheworm,limitedinformationisavailableontheregenerationofradioles,theanteriorappendagesusedforfeedingandrespiration.Radiolescanbedamagedbyphysicalorbiologicalmeans.WedocumentedtheoccurrenceofnaturalradioledamageintwopopulationsofS.insignisandexaminedtheprocessofradioleregenerationinthelaboratory.Intheshelteredboatbasinpopulation,68%ofthe22wormssampledshowedsignsofnaturaldamage.Whereas,all21oftheS.insignisfromtheexposedsitehadbranchialcrowndamage.Duringrecovery,S.insignisdidnotconsistentlyregeneratethesamenumberofbranchesasobservedpriortodamage.Inaddition,amajorityoftheradioleelongationduringrecoveryoccurredafterbranching.Whilethefullregenerationprocesswasnotobserved,after20days,4of12wormshadcompletedbifurcation,whichwassignifiedbypointedtipsonthedistal-mostbranches.Astheonlysabellidwithbranchedradioles,ourstudyofS.insignisprovidesauniqueexaminationofnaturaldamageandappendageregrowth.16)ContributionstotheknowledgeoflittoralpolychaeteannelidsfromTunisiaMarwaChaibi1,DanielMartin2,&AtfAzzouna11UniversitédeTunisElManar;2Centred’EstudisAvançatsdeBlanes(CEAB-CSIC)ManypolychaeteinventorieshavebeenproducedintheMediterraneanSea,beingprobablythemostcompleteandrecentthatincludedinColletal.(2010).InTunisia,severalstudiesdealtwithpolychaetesduringthelastcentury(McIntosh1912;Fauvel1924a,b;Zibrowius1970,1971;Bellan1961;Westheide1971,1972;Cantoneetal.1978),whichhavebeenrecentlyupdatedbasedonbibliography(Ayarietal.,2009)orondatafromparticularregions,suchastheNEcoastoftheTunisGulf(Zaâbi&Afli2005)ortheCapBonPeninsula(Zaabietal.2012).PartofthisfaunisticinformationwasobtainedfromecologicalstudiestargetingtheTunisianmarineecosystems,thusprovidingadditionalspeciesreports(Zaâbi&Afli2005,2006;Zaâbietal.2009,2010;Ayari&Afli2003,2008;TriguiEl-Menifetal.2007).ThepresentoralpresentationreportsonanupdateoftheinventoryofpolychaetespeciesfromTunisiancoastsbasedonanhistoricreviewofthepreviouslyexistingliteratureandonnewmaterialscollectedfromdifferenttypesofrepresentativehabitatsintheGulfofTunisia.Ourtaxonomicassessmentofthepolychaetefaunafromthegulfhasrevealedthepresenceof21families,36generaand80species,ofwhich20arenewforthecountry.TheseincludetheflabelligeridTrophoniellaradesiensis,recentlydescribedasanewspeciesbyChaibietal(2919).Asaresult,thetotalnumberofpolychaetespeciesknownfromtheTunisiancoastsrisesto258.

CumulativeimpactsofhypoxiaandtrawlingonNortheastPacificbenthos17)AlessiaC.Ciraolo&PaulV.R.SnelgroveDepartmentofOceanSciences,MemorialUniversityofNewfoundlandAnexpandingOxygenMinimumLayer(OMZ)intersectswithbottomtrawlingthathasimpactedtheBritishColumbia(BC)continentalslopebetween600and2000msince1990s.OurpreliminaryresultsfromdifferentdepthsandO2concentrationsindicatelowabundanceanddiversitydominatedbysedentaryanddetritivorouspolychaetes,butweaimtoimproveknowledgeonindividualandcumulativeimpactsoftheseactivitiesonbenthicdiversityandfunctioning,whichremainlargelyunknown.Specificallyourstudywillexaminetheco-varyingeffectsofdepthanddissolvedoxygentrendsthroughshort-term(<24h)shipboardincubationsofsedimentscollectedbymulticoring,andsuccessivelaboratoryanalysestoevaluatetheseparateandsynergisticeffectsofimpactson:1)howseabedmacrofaunalandmicrobialdiversityinteractwithO2gradientsandhistoricaltrawlingintensity;2)howtheseeffectsinfluencerecyclingoforganicmatterandnutrientregeneration.Enhancingknowledgecouldhelpindevelopingstrategiesformonitoringandprotectingdiversityandecosystemfunctioningofvulnerableenvironments.18)Myxicolainfundibulum(Montagu,1808)intheUK–Morethanonespecies?TeresaDarbyshireAmgueddfaCymru-NationalMuseumWalesMyxicolainfundibulum(Montagu,1808),thetypespeciesforthegenus,wasfirstdescribedfromtheKingsbridgeestuaryinthesouthofEngland.Sincethattimeover20specieshavebeendescribedunderthenameMyxicolawiththreeofthosebeingrecordedfromtheUK–M.aesthetica(Claparéde,1870),M.infundibulumandM.sarsii(Krøyer,1856).In1927,Fauvel


43synonymised6speciesofMyxicolawithM.infundibulum,includingM.sarsii,andHartman(1938,1942,1959)latersynonymisedafurther6species,alsowithM.infundibulum.OnlysevenspeciesofMyxicolaarecurrentlyconsideredvalid,andM.infundibulumisrecordedfromnorthwestandnortheastAtlanticcoasts,northeastPacificcoasts,theArcticandAustralia.IntheUK,M.aestheticaistheonlyothervalidspeciesrecordedforthegenusandisdistinctlydifferentinbothitssize(muchsmaller)anditshabitat(kelpholdfastsversussoftsediments).Twodistinctformsof‘infundibulum’appeartobepresenthowever,onewithblacktipstotheradiolesandonewithout(questionablyM.sarsii).Differencesintheappearanceofthetubearealsoapparentfromliveobservationsbydiversandthetwoformsrarelyoccurtogetherleadingtoincreasingquestionsonwhethertheyarereallythesamespecies.Anewproject,inconjunctionwithBritishdivers,willphotographandcollectspecimensofbothformsandundertakemorphologicalandmolecularanalysestodeterminetheirstatus.19)RedescriptionofNereis(Neanthes)micrommaHarper,1979(Polychaeta:Nereididae)basedontypematerialandadditionalmaterialfromTampaBay,Florida,USA,withadiscussionoftheontogeneticchangesinparapodialmorphologyandinclusioninthegenusNeanthesKinberg,1865enniferS.Davenport1&ChristopherJ.Glasby2J1WoodEnvironment&InfrastructureSolutions,Inc;2TheMuseumandArtGalleryoftheNorthernTerritorySeveralsmallspecimensofwhatwasinitiallythoughttobeanundescribednereididpolychaetewereobservedinbenthicsamplescollectedfromTampaBay,Florida,USA.Theylackednotopodialfalcigers,paragnathsandpapillaeontheproboscis,anduppernotopodialligules.However,slightlylargerspecimenspossessedasmall,developinguppernotopodialliguleandafewparagnathsontheproboscis.ComparisonwithcommonnereididpolychaetesfromthisareayieldedanidentificationofNereis(Neanthes)micrommaHarper,1979.MorphologicalcharacteristicsofthetypematerialandTampaBayspecimenswereexaminedwithstandardlightmicroscopyandSEM,andvariousmeasurementsweretaken.Statisticalanalyseswereperformedonthemorphometricdatainordertoevaluateontogeneticvariation.Resultsfromtheanalysesindicatedpreviouslyunreportedsize-relatedvariationinparagnatharrangementandparapodialmorphology;thereforearedescriptionofN.micrommawillbepresentedhere.Additionally,N.(Neanthes)micrommawasconfirmedasamemberofthegenusNeanthesKinberg,1865giventheresultsofthisstudy,andotherspeciescurrentlyassignedtothesubgenusNeanthesKinberg(1866)werealsoevaluatedfortheirmembershipinthegenus.20) DNAbarcodingofpolychaetescollectedduringthe2018RapidAssessmentSurveyofMarineSpeciesatNewEnglandfloatingdocks.AndrewDavid&MichaelKrickBiologyDepartment,ClarksonUniversityInthisstudyweincorporatedDNAbarcodingintoarecentRapidAssessmentSurveyofpolychaetefaunaassociatedwithfloatingdockcommunitiesfromtheNewEnglandcoast.Threeprimerpairswereusedtoamplifya550-710bpfragmentofthecytochromecoxidaseI(COI)genefor38specimenscollectedfromeightsitesalongtheNewEnglandcoastline.Barcodingresultsyielded11OperationalTaxonomicUnitsrepresentedbysixfamiliesandeachmorphologicallyidentifiedspecieswasmolecularlyconfirmedusingtheGenBankandBoLDdatabase(idscores:92-100%).Phylogeneticanalysesalongwithlowintraspecificgeneticdistanceestimates(0.000-0.019)stronglysupportedthesimilarityindices.AllspeciesexceptHarmothoeimbricatawererecordedinprevioussurveyswhereonlymorphologicaldatawasused.ThisisthefirstDNAbarcodingstudyofpolychaetesfromtheNewEnglandcoastanditreinforcestheutilityofmoleculardataforquickandaccurateidentificationsofmarineinvertebrates.21)ThestructurecharacterizationofbiocementproteinsfromPhragmatopomalapidosaMariaA.Dean,KrisCurtis,&JakeVanOortCoeCollegePhragmatopomalapidosaisagregarious,marineannelidlivinginlargereefstructuresalongtheintertidal,Atlanticcoastregions,fromVirginiatotheFloridaKeys.Thewormproducesaproteinaceousbiocementtowhichitattachessandgrainsinordertoformatubeshapedhome.Thisprojectusedaminoacidsequencesobtainedfromcementproteinstoexaminehowthebiocementmaybestructured.Acombinationofbenchchemicalanalysesofaminoacidmodificationsthatoccurnaturallyinthebiocementproteinswasusedwithcomputergeneratedstructurestopredictamodelthatcoversthebiocementproteininteractions.Bothsecondaryandtertiaryproteinstructureswerepredictedusingtwofreewareprograms,PredictProteinandPHYRE2,inordertoproposepossibleproteinfoldingandprotein-proteininteractions.


4422)SyllidsfromBrazil–aLilliputianperspectiveMarceloV.Fukuda1,MaikondiDomenico2,&RômuloBarroso3¹MuseudeZoologia,UniversidadedeSãoPaulo;2CentrodeEstudosdoMar,UniversidadeFederaldoParaná;3InstitutodeBiologia,UniversidadeFederalRuraldoRiodeJaneiroOfallthenearly172speciesoftheSyllidaeGrube,1850registeredinBrazilsofar,only5canbeconsideredasmeiofaunal:Braniaarminii(Langerhans,1879),Erinaceusylliscentroamericana(Hartmann-Schröder,1959),E.subterranea(Hartmann-Schröder,1960),Neopetitiaamphophthalma(Siewing,1956)andSalvatorianeapolitana(Goodrich,1930).ToenhancetheknowledgeonthisvastLilliputianworld,werecentlystartedaprojectaimingspecificallytogetabetterpictureoftheserepresentativesoftheinterstitialfauna.Withonlyacouplecollectionssofar,andinlocalitiesrelativelywell-studiedregardingtheinvertebratemacrofauna,wehavealreadyfound10morpho-speciesofsyllids:Erinaceusyllissp.,Exogonesp.,N.amphophthalma,Parapionosyllissp.,Salvatoriasp.1-2andSyllissp.1-4.Identificationstospecieslevelwerenotyetinitiated,andwillbecoupledwithmolecularcharacterizationofthetaxaatleastfor3markers(nuclear18Sandmitochondrial16SandCOI).Inanycase,theincipientresultssofarachievedindicatethepotentialincreaseinthenumberofspeciesrecognizedfromthemeiofauna;asweproceedwiththeidentificationsofthespeciesfound,itwillbepossibletodiscriminatewhethertheyareindeedrestrictedtotheseinterstitialenvironmentsoronlyjuvenilestagesofmoreubiquousspecies.Financialsupport:BrazilianNationalResearchCouncil(CNPq),proc.425143/2016-3.23)Exogoninae(Annelida;Syllidae)fromSouthwesternAtlanticoceanicislands:FournewspeciesandnewrecordsRodolfoL.Nascimento¹,²,MarceloV.Fukuda³,&PauloC.Paiva¹,²¹LaboratóriodePolychaeta,DepartamentodeZoologia,InstitutodeBiologia,UniversidadeFederaldoRiodeJaneiro;²ProgramadePós-graduaçãoemBiodiversidadeeBiologiaEvolutiva,InstitutodeBiologia,UniversidadeFederaldoRiodeJaneiro;³MuseudeZoologia,UniversidadedeSãoPauloUptonow,172speciesofSyllidaehavebeenrecordedinBrazilianwaters,mostlyfromcoastalregionsandsomefromthecontinentalslopeandthedeepsea.However,only7speciesareknownfromBrazilianoceanicislands(RocasAtoll,FernandodeNoronhaandTrindadeIslands),atleast545kmawayofthecoastbutstillpartoftheexclusiveeconomiczoneofthecountry.WedirectedsomeeffortstoinvestigatetherichnessofSyllidaeintheseislands.AsresultswepresenthereinfournewspeciesofExogoninae:Exogonesp.nov.,Salvatoriasp.nov.1,Salvatoriasp.nov.2andSphaerosyllissp.nov.Also,weprovidethefirstaccountofE.africana,E.breviantennata,E.naidinoides,E.simplexandSalvatoriasp.inSWAtlanticoceanicislands.Theserecordsmorethandoublethenumberofspeciesknownfortheseislands.Exogoneafricana,E.breviantennata,E.naidinoidesandE.simplexhavebeenpreviouslyrecordedfromtheAtlantic,Pacific,andIndianOceansassociatedwitharangeofsubstrates,atarangeofdepths.Withidentificationsbasedsolelyinthemorphology,toassumethatthesespeciesindeedhavesuchbroaddistributionmayhamperconservationeffortsandlowerourabilitytorecognizeintroducedandinvasivespecies,byanunderestimationofbiodiversity.TheuseofmuseumcollectionsandassociateDNAsequencestovouchers,andalsothecontinuedsurveyonthespeciesdiversities,especiallyofareasforwhichnoinformationisavailable,mayminimizetheseproblems.24)Levelsofinfestationbyanundescribedpolychaete(Polydora:Spionidae)inpopulationsoftheclamNodipectensubnodosusinOjodeLiebreLagoon,BajaCaliforniaSur,MexicoLauraGonzález-Ortiz1,PabloHernández-Alcántara2,&VerónicaRodríguez-Villanueva31UniversidadAutónomadeNuevoLeón,FacultaddeCienciasBiológicas;2UnidadAcadémicadeEcologíayBiodiversidadAcuática,InstitutodeCienciasdelMaryLimnología,UniversidadNacionalAutónomadeMéxico;3FacultaddeCienciasMarinas,InstitutodeInvestigacionesOceanológicas,UniversidadAutónomadeBajaCalifornia

Thelevelofinfestationintensity,andthepreferenceofthespionidPolydorasp.nov.foreithersuperiororinferiorvalvesinthehostclamNodipectensubnodosus(commonnamelion’spawscallop)wereanalyzedforpopulationsinOjodeLiebrelagoon,MexicanPacific.Atotalof639shellsfromtheclambanksChocolatero,Zacatoso,ElDátilandLaConchawerecollectedduringsevensamplingperiodscarriedoutbetweenMay2014andOctober2015.IntheclambanksChocolateroandZacatosotheclamswithsizeslessthan51cm2werethemostabundant,whileinLaConchaandElDatilthesizesbetween51-89cm2dominated.ThenumberofclamsinfectedbyPolydorasp.nov.wereclearlyhigherinChocolatero(88clams,60%)andZacatoso(86clams,51%)thaninLaConcha(35clams,21%)andElDatil(29clams,19%).InChocolateroandZacatoso61%and51%oftheuppervalvesand15%and14%ofthelowervalvespresentedblisters,whileinLaConchaandElDatiltheinfestationwassignificantlylower21%and19%oftheuppervalvesand6%and8%ofthelowervalvespresentedblisters.Onaverage,thepercentageofclamsinfestedbyPolydorasp.nov.wasclearlyhigherintheclambanksChocolatero(62.06%)andZacatoso(50.55%)thaninLaConcha(21.98%)andElDatil(5.97%).


4525)Firstreportofthenon-nativefreshwaternereididpolychaeteNamalycastishawaiiensis(Johnson,1903)inafreshwaterspringinIsrael,andpossiblerouteofintroductionLironGoren1,2&YaronHershkowitz21SchoolofZoology,TelAvivUniversity;2Israel’sAquaticEcologyCenter,SteinhardtMuseumofNaturalHistory,TelAvivUniversityThesubfamilyNamanereidinae(Annelida:Nereididae),isoneofthemostsuccessfulpolychaetegroupstocolonizebrackishandfreshwaterenvironmentsworldwide.Amongthem,Namalycastishawaiiensis(Johnson,1903),isoneofthefewnamanereidsthatisrecognizedasinvasive.ItwasfirstdescribedfromafreshwaterspringinHawaiiandhasatropicalIndo-PacificdistributionrangingfromHawaiiintheeasttoSumatrainthewest.RecentlyithasspreadtomainlandJapanviatheaquariumtradeandwasinterceptedinAustralia.HerewereportitsfirstrecordinafreshwaterspringinIsrael,theMiddleEast,anddiscussitspossiblerouteofintroduction.Wehypothesizethatthespecieswasunintentionallyintroducedviatheaquariumtrade,asadditionalspecimenswerecollectedandidentifiedfromanaquariumofcichlidfishfoundinapetstore.Wecorroboratepreviousstudiesandhypothesesthatacrypticinvasionofthisspecieshasalreadyexpandedworldwide.26)Diversityofsponge-associatedpolychaetesacrosstheMediterraneanSeaLironGoren1,2&MichaIlan11SchoolofZoology,TelAvivUniversity;2SteinhardtMuseumofNaturalHistory,TelAvivUniversitySponge-associatedinfaunahavebeeninvestigatedaroundtheworldandintheMediterranean.Althoughpolychaetesusuallydominatetheseassemblages,theyhavebeenconsideredtobeacollectionoffacultativespeciesrepresentingthefaunaofthesurroundinghabitats.InthisstudyweanalyzeddatafromtheliteraturealongwithnewinformationcollectedinIsrael,regardingsponge-inhabitingpolychaetecommunitiesacrosstheMediterraneanSea,inordertoevaluatehowstablethesecommunitiesareonalargebiogeographicalscale.Wecompiledlistsofallbenthicandsponge-associatedpolychaetefaunafortheMediterranean,itsregionsandsubareas,andusedclusteranalysis,ordinationsandtaxonomicdiversityindices(averagetaxonomicdistinctnessAvTDandvariationintaxonomicdistinctnessVarTD)toexaminethesecommunities.1,110speciesofbenthicpolychaeteshadbeenreportedfromtheMediterranean,ofthem195werereportedfromsponges.Communitycompositionandtrophicstructureofsponge-inhabitingpolychaetesismaintainedacrosstheMediterranean,withthemajorityofspeciesbelongingtothefamilySyllidae,followedbySabellidaeandNereididae.Togethertheyaccountedfor40%-60%ofthespeciesfoundinsidesponges.Mostofthespeciesarecarnivorous(45-75%)followedbydepositfeeders(20-25%),omnivores(9-25%)andfilterfeeders,whocomprise9-15%ofthespecies.LowAvTDandHighVarTDsuggeststhatsponge-inhabitingspeciesaremorerelatedtoeachother,andcommunityisthusgovernedbyenvironmentalconditions(habitat)ratherthanbioticinteractions(competitionetc.).Thisstudysuggeststhatsponge-inhabitingpolychaetesarenotjusttransientassemblyoffacultativespecies,ratheritisaspecializedandstableecologicalcommunity.27) InvestigatingthearrivalofanalienLeonnates(Annelida:Nereididae)inNewZealandFionaGower1,GeoffreyBRead2,BarryGreenfield2,&JosephMarlow11CawthornInstitute;2NIWAWereportontheprogressiveestablishmentofanewaliennereididworminNewZealand.ThedistinctivelypapillatedLeonnatesgenus(11species)wasrecordedforthefirsttimeinNewZealandseasinJune2017.Asinglespecimen,provisionallyconsideredtheAustralianspeciesL.stephensoniRullier,wasdetectedinAucklandHarbour.Thisindividualwasfoundamongawell-studiedwormfaunaatanintertidalsitethathasbeenmonitoredfornearly20years.Sincethatfirstfindthespecieshasbeendetectedelsewhereatsomenear-shoresites,bothnearbyandasfaras60kmawayintheHaurakiGulf.Wealsopresentmoleculardatabywhichwehopetocomparethenewarrivaltoitscongenersknownfromwarmerwaters.

SmallmorphologicaldifferenceshelptodiscerncrypticspeciesofsouthernCaliforniaorbiniids28)BrentHagginLosAngelesCountySanitationDistrictsEcologicalmonitoringprogramsrelyondiversityestimatestomakedecisionsonthehealthofthelocalenvironment,butduetodifficultiesinspeciesdifferentiation,crypticspeciescanartificiallylowerthediversityestimateby“lumping”multiplespeciesintoone.Whileminormorphologicaldifferencesmaybeattributedtophenotypicvariabilityinglobalpopulations,thesedifferencesmaybethekeytodifferentiatingbetweencrypticspeciesofsimilarorganismsfromlocalpopulationsandpreviouslydescribedcosmopolitanspecies.PolychaetesofthefamilyOrbiniidaehavebeenroutinelycollectedoffofthePalosVerdesPeninsula,Californiaandarchivedoverthepast40plusyears.Threespeciescomplexes(Scoloplosacmeceps,alocalspeciesdescribedfromsouthernCaliforniaandreportedfromAlaskatoMexico;Leitoscoloplospugettensis,aregionalspeciesdescribedfromthePugetSound,WashingtonandreportedfromAlaskatoCostaRicaandChile;andScoloplosarmiger,acosmopolitanspeciesdescribedfromtheNorthSeaandreportedglobally)wereexaminedusinglightmicroscopytoidentifyminormorphologicaldifferences,suchaspigmentpatternsandchaetalarrangement.Thesedifferencesallowed


46eachspeciescomplextobeseparatedintotwoormoreprovisionalspecies.Theproperidentificationanddifferentiationoflocalspecieswillallowforamorerobustevaluationofdiversitywithinthebenthicecosystemandamoreinformedchoiceinfutureenvironmentalmanagementdecisions.FuturecollectionswillfocusonpreservationinethanolandtheuseofDNAtoconfirmthatthesedifferencesrepresentnewspeciesandnotjustphenotypicvariationwithinthepopulation.29)RoleofspatialandtemporalheterogeneityinmoderatingtemperateshelfseacarbonandmacronutrientstocksRachelHale1,2,KarenTait3,JasminA.Godbold2,4,&MartinSolan21NationalInstituteofWaterandAtmosphericResearch;2OceanandEarthScience,NationalOceanographyCentreSouthampton;3PlymouthMarineLaboratory;4BiologicalSciences,UniversityofSouthamptonContinentalshelfseasaredynamicandproductivehabitats.Assuchtheyplayadisproportionateroleinglobalcarbon,macro-andmicro-nutrientcycling.Theheterogeneityoftheseenvironmentsacrossmultiplescalesiskeyinsupportingdiversefaunalcommunitiesandmoderatingbenthicbiogeochemicalcycling.However,thereisstilluncertaintyinhowvariabilityaffectstheseprocessesandunderwhatcircumstancesshelfsedimentsactassourcesorsinksofcarbonandnutrients.Weshowthatheterogeneityisakeystructuringforceofshelfwidepatternsinsedimentbiogeochemicalcyclingmediatedthroughhabitatmodificationbyadiverseinfaunalcommunity.Faunalactivitydiffersseasonallyacrosshabitattypes,withconsequentchangesinsediment-waternutrienttransport.Small-scalevariationsinsedimentbiogeochemicalgradientsrevealtheimportanceofspecifictaxaforcreationofmicrobialhotspotswithincreasedabundanceandactivityofN-cyclingmicrobes.Ourresultsdemonstratetheextenttowhichinvertebratecommunitystructureisbothinfluencedbyandcreatesbenthichabitatheterogeneity,mediatingbiogeochemicalcyclinginshelfseasatbothlargeandsmallscales.Theseobservationshighlightthedynamicnatureofthebiodiversity–habitatstructurecomplexandbegintoestablishgeneralitiesofhowabioticandbioticinteractions,includingfeedbacksandlinkages,influencemacronutrientandcarbonexchangeinshelfseaecosystems.30)SheddinglightonannelidbioluminescenceMaryColleenHannon1,AndersonGarbugliodeOliveira2,&AnjaSchulze11TexasA&MUniversity,Galveston;2UniversityofSãoPauloThereare13knownbioluminescentfamiliesinthephylumAnnelida,includingpolychaetesandclitellates.Lightemissionthroughbioluminescenceappearsmultipletimeswithinthecladeandislikelyaconvergenttrait.Polychaetelightproductionhasbeenrecordedasadefensemechanism,injuryresponse,matingcue,orgeneralresponsetoexperimentalchemicalormechanicalperturbation.Inallinstances,bioluminescenceisproducedthroughachemicalreactioninvolvingthereleaseofchemicalenergyintheformoflight,followingtheoxidationofasubstrate(smallorganicmoleculegenericallycalledluciferin)catalyzedbyanenzyme(luciferase).Luciferinsarehighlyconservedwhilsttheirassociatedluciferasescanbemorevariedgenetically,leadingtoadiverserangeofcolorsforbioluminescentreactions.Untilrecently,fewstudieshavetakenonthetaskofidentifyingnewluminescentenzymesandcharacterizingthespecificgenesinvolved.Additionally,newtechniquesinisolatingluciferaseshaveprovidedinsightintothebiochemistryofthesereactions.Researchcombiningthesenewtechniquesandpubliclyavailablegeneticdatawillshedlightonthephysicalandphylogeneticpropertiesofannelidbioluminescence.31) Adaptativeconvergenciesledtosimilarmorphologiesinplanktonicannelidstages MariaTeresaAguadoMolina1,GuillermoPonz2,&ConradHelm11Georg-AugustUniversityGoettingen;2UniversidadAutónomadeMadridThenameplanktonisderivedfromtheGreekπλαγκτός"planktos",whichmeanserrantanditisusedtorefertothediversegroupsoforganismsthatliveintheopenwatercolumn.WithintheAnnelida,someoftheseorganismsarepolychaetesthatspendtheirentirelifecyclesinthewatercolumn(i.e.Tomopteris),othersarepresentonlyforshortperiodsduringcertainreproductivestages(e.g.epitokesinnereididsandsyllids).Acrossthedifferentannelidfamilies,thesetaxausuallysharecomparablestructures,suchaslongparapodiaandparapodialappendagesforswimming,aswellasremarkableanteriorsensorystructures,suchasprominenteyesorchemosensoryorgans.Hereinwealsocomparetheinnermorphologyoftheseadaptationalconvergenciestothisparticularenvironment.Usingimmunohistochemistryandsubsequentclsm,wecompareTomopterissp.andtheepitokesofPlatynereisdumeriliiandRamisyllismulticaudata.Basedonourinvestigations,allthreeannelidgroupsshowmanysimilaritiesconcerningtheirinternalmorphologywhencomparingplanktonicstages.Furthermore,thepresenceofthesefeaturesinstolonsofRamisyllissuggestsplanktonicdispersalofthelatterandthusuncoversthereproductivestrategyofthisscarcelyinvestigatedtaxon.


4732)Co-occuringtwoundescribedspeciesofthegenusStygpcapitella(Parergodrilidae)NatsumiHookabe1,NaotoJimi2,ShintaFujimoto3,&HiroshiKajihara11GraduateSchool/FacultyofScience,HokkaidoUniversity;2BioscienceGroup,NationalInstituteofPolarResearch;3ResearchCenterforMarineBiology,GraduateSchoolofLifeSciences,TohokuUniversityAnnelidsinthegenusStygocapitellaKnöller,1934inhabitsandybeachesaroundorabovehigh-waterline.Wereporttwoundescribedspecies,Stygocapitellasp.1andStygocapitellasp.2,fromJapan.Stygocapitellasp.1ischaracterizedbyfourbilimbateandtwoforkedchaetaeinchaetiger2.Stygocapitellasp.2ismorphologicallymostsimilartoS.australisStruck,Koczula,Stateczny,Meyer&Purschke,2017,butcanbediscriminatedfromthelatterbyhavingaslightlyforkedpygidium.WereconstructedthephylogenyofStygocapitellabymaximumlikelihoodandBayesianinferenceanalysesusingpartialsequencesofthemitochondrialCOIandnuclear18SrRNAgenes.Thegeneticdistancesbetweenthemostcloselyrelatedtwospecies,Stygocapitellasp.1andS.subterraneaKnöllner,1934,forCOIwere20.4–20.7%(p-distance)and24.1–24.5%(Kimuratwo-parameterdistance),comparablewithinterspecificdistancesinotherinterstitialpolychaetegenera.Ourmolecularanalysesdidnotsuggestasister-grouprelationshipbetweenStygocapitellasp.1andStygocapitellasp.2,inspiteoftheirsimultaneousoccurrenceatthesameverticallevelinasinglelocality.Simultaneousoccurrenceofcongenersinhabitingthesandybeachisknowninotherinterstitialannelids(e.g.,Diurodrilus).InthecaseofDiurodrilus,however,theabundanceofeachspeciesdependsontheverticallevel;thereisnorecordoftwoormoreDiurodrilusspeciesinhabitingthesamehorizontallevelatthesametime.Weprovidepossibleexplanationforthesimultaneousoccurrenceofnon-sisterStygocapitellasp.1andStygocapitellasp.2intermsofvicarianceanddispersalevents.33)SpiculesinanundescribedspeciesofThoracophelia(Opheliidae)NaotoJimi1,ShintaFujimoto2,&SatoshiImura11BioscienceGroup,NationalInstituteofPolarResearch;2ResearchCenterforMarineBiology,GraduateSchoolofLifeSciences,TohokuUniversitySpiculeshavebeenknownfromamongseveralgroupsofanimalsandstudiedintermsoftheirfunctionandevolution.Sofar,however,onlythree(Echinofabriciaalata,E.dubia,E.goodhartzorum;Fabriciidae)ofthe12,000polychaetespeciesareknowntohavespicules.Recently,wefoundspiculesinanundescribedThoracopheliaspecies(Opheliidae).Thisspecies’spiculesarestick-shaped(aboutlength:width=30:1),about15μmlong,anddistributedinthecoelomcavityoftheworm.OurfindingofspiculesinOpheliidaeindicatesthatpolychaetes’spiculeshavemultipleorigins.Additionally,theundescribedspeciescanbediscriminatedfromothercongenersbyfollowingfeatures:i)havingverysmallbody(bodylength=around1mm);ii)havingsimplebranchiae(nobranching,smooth);iii)havingspiculesinsidethebody;iv)bodyformula5anteriorabranchiatechaetigers+20branchiatechaetigers+0posteriorabranchiatechaetigers=25chaetigers.34)AnundescribedspeciesofinterstitialacrocirridMacrochaeta(Acrocirridae)NaotoJimi1,ShintaFujimoto2,&SatoshiImura11BioscienceGroup,NationalInstituteofPolarResearch;2ResearchCenterforMarineBiology,GraduateSchoolofLifeSciences,TohokuUniversityWereportanundescribedspeciesofMacrochaetafromtheOkinawaIsland,RyukyuIslands,Japan.Individualsoftheundescribedspecieswerecollectedfromsubtidalcoarsesandatseveralsitesrangingfrom1–41mbelowsealevel.Theundescribedspeciescanbediscriminatedfromitscongenersbythefollowingfeatures:i)havingonlytwopairsbranchiae,ii)havingoneortwoneurochaetaeperfascicle,iii)havingdorsallyandventrallyfusedachaetigers.35) Historicalphylogeographyandcrypticevolutionofthree(pseudo)crypticnereididpolychaetesfromSouthAfricaJyothiKara1,AngusH.H.Macdonald2,KerrySink3,&CarolA.Simon11DepartmentofBotanyandZoology,StellenboschUniversity;2SchoolofLifeSciences,UniversityofKwaZulu-Natal;3SouthAfricanNationalBiodiversityInstituteSouthAfricanPlatynereisBsp.nov.andPlatynereismassiliensiss.l.aremembersofthetruecrypticP.dumeriliispecies-complexasdemonstratedbytheiridenticalmorphologiesandgeneticdistinctness.Bycontrast,PseudonereispodocirraispartofthePseudonereisvariegata(pseudo)crypticcomplexastheyaremorphologicallysimilarbutgeneticallydistinctspecies.ThethreeSouthAfricanspecieshaveoverlappingdistributionsbutdisplaycontrastingpopulationgeneticstructurepatterns;differencesobservedforthetwoPlatynereisspeciescouldbeexplainedbylarvaldevelopmentandbiogeography,whereasthepanmicticpopulationobservedforP.podocirrawashypothesisedtohaveresultedfromhistoricalprocesses.Thisstudyaimedtoinvestigatethehistoricalprocesscontributingtothecontrastingpatternsofstructureandtoinvestigatetheprocessesthatgoverncrypticand(pseudo)crypticdiversity.AnmtCOIdatedchronogramrevealedthatclimaticconditionsduringthemiddle-latePleistoceneinfluencedthepopulationstructureofthethreespecies.Additionally,agealsocontributedtothecontrastingpatternsofstructureevidencedbyhighgeneflowacrossgeneticbarriersalongthecoastintheolderP.podocirraindicatingresilience,whilsttheyoungerPlatynereisspeciesdisplayedstructuredlineagesthatwere


48limitedbythesegeneticbarriers.ThetwoSouthAfricanPlatynereisspeciesarehypothesisedtohaveevolvedsympatricallyduetoreproductiveisolationanddifferencesintemperaturepreferencesandtheiridenticalmorphologiessuggestthatthesespeciesareundergoingmorphologicalstasisdespitetheirancientdivergencetimeswhereasP.podocirraandP.variegataspeciatedallopatricallyandareundergoingmorphologicalstasisorconvergence.36) PhylogeographyofJapanesearenicolidsGenkiKobayashi1,NaotoJimi2,&ShigeakiKojima31KyotoUniversity;2NationalInstituteofPolarResearch;3TheUniversityofTokyoArenicolidaeincludesca.30describedspeciesinfourgenera.Althoughsomearenicolidsaremorphologicallysimilartoeachotheranddifficulttoidentify,taxonomicconfirmationbasedonmoleculardataisscarce.Atleastfourspeciesofarenicolids,i.e.,Abarenicolaclaparedioceanica,Abarenicolapacifica,Arenicolabrasiliensis,andBranchiomaldanesimplex,havebeenrecognizedinJapan.Inthisstudy,thefirstphylogeographicalpatternsofJapanesearenicolidswererevealedbasedonnucleotidesequencesoftwomitochondrialgenes(COIand16S)andanucleargene(ITS2).Inadditiontotwolineagesincludingalreadyreportedtwospecies(AbarenicolaclaparedioceanicaandAbarenicolapacifica),threelineagesofunidentifiedspecies(Abarenicolasp.,Arenicolacf.cristata,andArenicolasp.)wererecognizedbymolecularphylogeneticanalyses.Weareexaminingthemorphologyofeachlineageandintraspecificgeneticdifferencesamonglocalpopulations.37)RedescriptonofthreelesserknowngeneraandspeciesofArchinominaeKudenov,1991(Annelida:Amphinomidae)JerryD.Kudenov1&ElizabethBorda21UniversityofAlaskaAnchorage;2TexasA&MUniversity,SanAntonioSeveralgeneraofArchinominaeKudenov,1991(Annelida:Amphinomidae)remainpoorlyknown,particularlytheircaruncles,sincetheywereoriginallydescribedoveracenturyago,includingBathychloeiaHorst,1910,ChloenopsisFauchald,1977,ParachloeiaHorst,1911andSangiriaHorst,1912.Thefirsttaxon,Bathychloeia,ispresentlythesubjectofaseparatestudythatwillbereportedelsewhere.Eachofthelatterthreegeneraaremonotypicandareredescribedbasedsolelyontypematerials.WhileChloenopsishaspinnatebranchiaeandharpoonnotochaetae,itsmoderatelydevelopedcarunclelacksacondensedmediankeeltypicallyobservedinChloeiaandNotopygos.Rather,theciliatednuchalridgesontheextrememarginsofitsmedialandlateralcaruncularlobesformconspicuoussubverticalandhorizontalramparts,respectively,extendingthecaruncle’slength.ItsrelationshiptoBathychloeia,highlightedbypreviousauthors,isonefocusofthisstudy.ParachloeiaappearstobebasedonasexuallyimmaturespecimenthatisessentiallyidenticalanatomicallytoNotopygosGrube,1855,thelatterofwhichwetentativelyproposeistheseniorsynonymofParachloeia.Finally,Sangiriadisplaysunusualtuftsofpinnatebranchiae,lacksharpoonnotochaetae,anditscarunclealsolacksamedialkeel.However,itsmarginal,ciliatednuchalridgesonformonlyafewshallowlyscallopedfolds,anditslow-lyingmediallobeistransverselycreased,smoothandappearsglandular.WecontendthatthecarunclesthesearchinominspresentedanatomicalfeaturesthatfelloutsideacceptedconstructsoftheAmphinomidaewhich,atthetime,challengedandperplexedbothHorstandMcIntosh.38)AnewspeciesoftheSpirobranchuskraussiicomplex(Annelida,Serpulidae)fromthePersianGulfandGulfofOmanSamanehPazoki1,HassanRahimian1,TorstenH.Struck2,AhmadR.Katouzian1,&ElenaKupriyanova31DepartmentofAnimalBiology,FacultyofBiology,SchoolofBiologyandCentreofExcellenceinPhylogenyofLivingOrganisms,CollegeofSciences,UniversityofTehran;2NaturalHistoryMuseum,UniversityofOslo;3AustralianMuseumResearchInstitute,AustralianMuseumArecentstudy(Simonetal.2019)confirmedthatSpirobranchuskraussiiisnotawidelydistributedtropicalspeciesofIndo-PacificoriginandaLessepsianmigranttotheMediterranean,butalargecomplexofspecies,someofwhichmightbeindeedinvasive.Thus,acommonintertidalgregariousserpulid,previouslyattributedtoS.kraussiiinPersianGulfandGulfofOman,wasdescribedasS.persicussp.nov.,usingacombinationofmorphologicaldatawithnuclear18SandmitochondrialCytBsequencedata.ThenewspeciesdiffersfromS.kraussiibysmallersize,fewerabdominalchaetigersandshapeoftalon.Bayesianandmaximumlikelihoodphylogeneticanalysesbasedonacombineddatasetofnucleotide18Sandamino-acidCytBsequencessupportedmonophylyofS.kraussiiclade(currentlyincludingS.kraussii,S.persicusn.sp.,threeunnamedspecies,andS.cariniferus).ApreliminaryhypothesisofphylogeneticrelationshipsintheS.kraussiicomplexrevealedthatthenewspeciesformsawell-supportedcladewithunnamedspeciesfromAustralia,HawaiiandAfrica,andallthoseformacladewithaspeciesfromJapan,whileS.cariniferusisabasalgradetotherest.Evidenceofsubstitutionsaturationata300bpfragmentofnucleotideCytBsuggeststhatusingtranslatedaminoacidsequencesofCytBtoexcludenon-informativesubstitutionsshouldprovideabetterphylogeneticresolutionforthegenusSpirobranchus.FurtherstudiesareneededtodeterminethetaxonomicandinvasivestatusofS.cf.kraussiipopulationsfromtheMediterraneanSea,SuezBay,Pakistan,India,SriLanka,Philippines,Singapore,andPanama.


4939) Host-specificityincorals-associatedChristmastreewormsofthegenusSpirobranchusBlainville,1818(Serpulidae,Annelida).ElenaKupriyanova1,MariaJ.Schreider2,JohathanKool2,RichardYu2,&WilliamLeggat21AustralianMuseumResearchInstitute,AustralianMuseum;2SchoolofEnvironmentalandLifeSciences,UniversityofNewcastleChristmastreewormsareserpulidsofthegenusSpirobranchuslivinginassociationwithandcharacterisedbybrightlycolouredspirallingradiolesexpandingabovecoralsurface.Theexactnatureoftherelationshipsbetweenthewormsandtheircoralhostsisunclearandisimportantforunderstandingthefunctioningofthecoralreefsystem.TodeterminewhethertherewereconsistentgeneticdifferencesamongSpirobranchusfoundondifferentspeciesofcoral,wesequencedfragmentsofmitochondrialcytochromeoxidaseb(Cyt-b)andnuclearinternaltranscribedspacer(ITS)genesofSpirobranchusspecimensopportunisticallycollectedfromcoralreefsofRowleyShoals,Kimberley,WesternAustralia.Ourresultssuggestalackofhost-specificitybetweenwormsandcorals,althoughthisappliessofartoarestrictedgeographicalarea.WehavealsousedourdataincombinationwithexistingDNAsequencedataS.corniculatustofurtherinvestigatespeciesdelimitationsofChristmastreewormsintheIndo-Pacificregion.40) FunctionalredundancyinpolychaeteassemblagesfromatropicalLargeMarineEcosystem(LME)PaulodaCunhaLana&BarbaraCarolinaGarciaGimenezBenthosLab,CenterforMarineStudies,FederalUniversityofParanáFunctionalredundancyassumesacriticalrelevancenowadaysduetotheseriousthreatsthataffectmarinelifeworldwide.WeassessedandcomparedlevelsoffunctionalredundancyinpolychaeteassemblagesfromthecontinentalshelfandfromestuarineenvironmentsalongtheSouthBrazilShelfLargeMarineEcosystem(SBSLME).Toquantifyfunctionalredundancy,weusedfunctionaloriginality(FOri)andfunctionaluniqueness(FUni).Wefound61and48polychaetetaxadistributedin50and42functionalentities(i.e.,auniquecombinationoftraitvalues)incontinentalshelfandestuarineenvironments,respectively.Resultssuggestalowleveloffunctionalredundancyinbothenvironments.However,FOriwashigherintheestuarineenvironment,whileFUniwashigherinthecontinentalshelf.Asexpected,estuarinepolychaeteshavefeweruniquecombinationsoftraitvalues,butthesecombinationsaremoreoriginalandadequatetothevaryingconditionsimposedbyestuarineenvironmentaldrivers.41) RevisionofThelepodidaeandTelothelepodidae(Polychaeta)fromFrenchwatersNicolasLavesque1,PatHutchings2,&MarioH.Londoño-Mesa31CNRS,UniversityofBordeaux;2AustralianMuseum;3UniversidaddeAntioquiaInspiteofcenturiesofEuropeanmarinebiodiversitystudies,itisclearthatnewspeciesarestillbeingdescribed.Maybethisisbecauseofthelackofsystematicsampling,aswellasincreasingrecognitionofspeciescomplexesandthemythofthesocalled“cosmopolitan”species.Thisresearchisthesecondpartofthe“SpaghettiProject”aimingtoreviseFrenchspeciesofspaghettiworms(Polycirridae,Terebellidae,Thelepodidae,TrichobranchidaeandTelothelepodidae).ThiscollaborativeprojectinvolvesallbenthictaxonomistsfromFrenchmarinestations(RESOMARnetwork)andinternationalcollaborators,andisbasedonbothnewlycollectedspecimensandavailablematerialfromdifferentFrenchcollections.TelothelepodidaeNogueira,Fitzhugh,Hutchings2013isanewlyrecognizedfamilypreviouslyconsideredasbelongingtothesubfamilyThelepodinaeHessle,1917,whichisalsonowconsideredasthefamilyThelepodidae.SpeciesofthesetwofamiliesarepresentinFrenchwaters,belongingtothreegenera:ThelepusLeuckart,1849,ParathelepusCaullery,1915andStreblosomaSars,1872.42) Firstrecordsandnorthernmostdistributionoftwospionidspecies(NEAtlantic,BayofBiscay)NicolasLavesque1,JérômeJourde2,SuzieHumbert1,BastienLamarque1,Pierre-GuySauriau2,&KarinMeißner31CNRS,UniversityofBordeaux;2UniversityofLaRochelle;3ForschungsinstitutSenckenberg,DZMBThisstudypresentsfirstrecordsofSpiophanesaferMeißner,2005andPrionospiocristaventralisDelgado-Blas,Díaz-Díaz&Viéitez,2018fromFrenchwaters.ThesetwospecieswerecollectedrecentlyinthesouthernpartoftheBayofBiscay.Spiophanesaferischaracterizedbythepresenceofanoccipitalantenna,dorsalciliatedorgansextendingtochaetigers13–15,neuropodialhooksfromchaetiger15,ventrolateralintersegmentalpouchesfromchaetigers14–15,thepresenceofchaetalspreadersof“2+3type”,andconspicuousdarkbrownpigmentonparapodiaofchaetigers9–13.Prionospiocristaventralisischaracterizedbyfirstandfourthpairofbranchiaebeingpinnateandpairs2–3apinnate,ventralcrestspresentfromchaetigers11–12,highdorsalcrestsonchaetigers10–11andverylargenotopodialprechaetallamellaeonanteriorchaetigers.Forbothspeciesthesenewrecordsrepresentanorthernextensionoftheirknowndistributionalrange.


5043) AnewPoecilochaetus(Annelida:Poecilochaetidae)fromRodrigues,southwestIndianOcean,aredescriptionofP.serpenshoniaraeGibbs,1971,andaphylogenyofthefamilyAndrewS.Y.Mackie1&CinthyaS.G.Santos21AmgueddfaCymru,NationalMuseumWales;2UniversidadeFederalFluminenseAnewspeciesofPoecilochaetusfromRodriguesisdescribedandcomparedwithP.serpensAllen,1904fromEngland,UK.PoecilochaetusserpenshoniaraeGibbs,1971fromtheSolomonIslands,southwestPacificOcean,isre-examinedanditsstatuschangedtoP.honiarae.AnewphylogeneticanalysisofPoecilochaetidaeispresentedandspeciesrelationshipswithinthePoecilochaetidaediscussed.44) UsingAutonomousReefMonitoringStructures(ARMS)andDNAbarcodingtoassesspolychaetediversityonPacificcoralreefsD.McHugh1&M.Timmers21DepartmentofBiology,ColgateUniversity;2NationalOceanicandAtmosphericAdministration-CREP/UniversityofHawaii-JIMARUsingAutonomousReefMonitoringStructures(ARMS),standardizedreefcryptofaunacollectiondevices,weassessedandcomparedthediversityofpolychaetesfromdeployedunitsrecoveredfrom15metersdepthaftera3-yearperiodatlocationsalongthe1500-milelongHawaiianArchipelago:Hawaii,Maui,Kaua’i,FrenchFrigateShoals,LisianskiIsland,PearlandHermesAtoll,andKureAtoll.Uptofivesitesweresampledforeachlocation,withtwoorthreeARMSunitsrecoveredfromeachsite.Preliminaryanalysesofbarcodesforpolychaetes(>2mm)acrossalllocationsindicatelowdiversityforseveralfamilies,includingTerebellidae(60specimens,8OTUs),Eunicidae(100specimens,4OTUs),Polynoidae(22specimens,2OTUs),andAmphinomidae(24specimens,4OTUs);veryfewoftheOTUsmatchspeciesrecordsinBOLDorGenBank.Wearecontinuingtoassesswhetherthesepatternsholdacrossotherpolychaetegroups.(SupportedinpartbyNSF1036537.)45)Revisionofthe“Marphysasanguinea”speciescomplex(Annelida:Eunicidae)IsabelC.Molina-AcevedoEstructurayFuncióndelBentos,Depto.SistemáticayEcologíaAcuática,ElColegiodelaFronteraSurMarphysasanguineawasdescribedfromDevonshire(U.K.)byMontaguin1813.Duetothebriefinformationonmorphologyincludedintheoriginaldescription,thespecieshasbeencommonlyconfusedwithnativespeciestriggeringrecordsofM.sanguineafrommanylocalitiesaroundtheworld.Inaddition,10nominalspeciesmorphologicallysimilartoM.sanguineawereimproperlysynonymizedsincetheavailabletypematerialswerenotrevised.TheredescriptionandthedesignationofaneotypeofM.sanguineaproposedrecentlyhaveaidedtocompareseveralworldwiderecords,andallowedtodescribe13newspecies.However,onlyafewofthenominalspeciesinsynonymyhavebeenaddressedindetail,andreinstatedafteranaccuratemorphologicalrevision.Theaimofthisstudyistoclarifythecurrenttaxonomicstatusofallthespeciesusingtherecentlyproposednovelmorphologicalmethods,andtoreassesstheworldwidedistributionofM.sanguinea.Herein,thetypeandadditionalmaterialsfromtheremainingspeciespreviouslyconsideredjuniorsynonymsofM.sanguineaarestudiedindetail;likewise,thetypesofsomeofthevalidspecies,andotherspecimensrecordedinliteratureasM.sanguineafromseveralregionsarealsorevised.Sixspeciesarereinstated,twoofthemraisedtospecieslevel,byhavingseveralfeaturesdifferenttoM.sanguinea,astheformsofdorsalcirriandpostchaetallobes,thesubacicularhookcoloration,thedistributionofbranchiaeandthenumberofbranchialfilaments,andthetypesofpectinatechaetae.Further,twospeciesaresynonymized,andtwonewspeciesfromHawaiiandCroatiaareproposed.46)MorphologicalstudiesofsomecloselyrelatedgeneraofMarphysaDeQuatrefages,1865(Annelida:Eunicidae)IsabelC.Molina-AcevedoEstructurayFuncióndelBentos,Depto.SistemáticayEcologíaAcuática,ElColegiodelaFronteraSurMarphysaisrepresentedbymorethan90specieswhicharedividedintoseveralinformalgroupingswithabroadvarietyofshapes:A,B1-D1(“Bellii”group),B2(“Sanguinea”group),C2(“Aenea”group),“Mortenseni”group,and“Teretiuscula”group.ThisdiversityofformsandgroupshavedisclosedMarphysaasaheterogeneous,poorlydelimitedgenus.ThemostrecentphylogenicreconstructionofeunicidssuggestedMarphysamonophyletic;nevertheless,thenewrecentlyproposedgenus,TreadwellphysaMolina-AcevedoandCarrera-Parra,2017,whichenclosesspeciespreviouslyregardedinacoupleofMarphysagroupings,questionsitsmonophyly.TheaimofthisstudyistoevaluatewhethertheywouldbeconsidereddifferentfromMarphysagenus.Herein,thetypeandadditionalmaterialsof42speciesbelongingtothreeartificialgroupsofMarphysaarestudied.Afteradetailedmorphologicalrevision,thegroupsB-D1,thegroupC2,andthe“Mortenseni”groupareconsideredasbelongingtoindependentgenerabythearchitectureofthemaxillaryapparatus,thebranchialdistribution,andtheformoftheprostomiumandventralcirriwithswollenbase.Therefore,twonewgeneraareproposedandoneisreinstated.Paucibranchiacontains20validspecies:13previouslyclassifiedinthegroupsB1-D1,and7newspecies.Thesecondnewgenusencompasses10validspecies:5previouslybelongingtothe“Mortenseni”group,and5newspecies.


51Finally,AmphiroKinberg,1865isrestablished,andcontains9validspecies:8previouslyregardedinthegroupC2,andonenewspecies.ThediagnosisofMarphysaisrestrictedregardingtothemorphologyofthespeciesintothegroupsB2and“Teretiuscula”.47)TheMagelonidaeofWestAfricaKateMortimer1,JonAndersKongsrud2,&EndreWillassen21AmgueddfaCymru,NationalMuseumWales;2DepartmentofNaturalHistory,UniversityMuseumofBergenBenthicsamplescollectedduringtwomajorprojects(CanaryCurrentLargeMarineEcosystemproject,CCLMEandtheGuineaCurrentLargeMarineEcosystemproject,GCLME)since2005havehighlightedahugediversityofmagelonidspeciesoffthewestcoastofAfrica(inexcessof20species),manyofwhichareundescribed.ThemagelonidfaunaoftheregionhasbeeninvestigatedinacollaborativeprojectbetweentheUniversityMuseumofBergenandAmgueddfaCymru–NationalMuseumWales(aspartoftheMarineInvertebratesofWesternAfrica(MIWA)program)viamorphologicalandmoleculartechniques.Currentresultshavehighlightedsixmagelonidspeciesintheregioncarryingpigmentationoftheposteriorthorax,andseveralspeciessharingsimilaritieswithMagelonacornuta,originallydescribedfromthePersianGulf.ThepresenceoffourEuropeanspeciesoccurringoffwesternAfricahasbeenconfirmed.48)Newidentificationtoolsforscaleworms(Annelida:Aphroditiformia)RobinWilson1,MarkNikolic1,AnnaMurray2,&KristianFauchald†1MuseumsVictoria;2AustralianMuseumAhostofrecentresearchhasgreatlyimprovedourunderstandingofphylogeneticrelationships,andhenceclassification,oftheAphroditiformiaorscaleworms.Changesincludediscoveryanddescriptionofmanynewtaxa,redefinitionofthepredominantlyabyssalMacellicephalinaetoincludemanytaxawithoneorveryfewspecies,andrevisedstatusofanumberoffamily-leveltaxa.Ongoingresearchwillcontinuetoprovidebetterresolution.However,paradoxically,thesediscoveriesmakethechallengeofidentifyingscalewormsnoteasierbutmoredifficult.Theexistingtaxonomicliterature,andunpublishedtypedescriptionsfromthelateKristianFauchaldwillbereinterpretedunderthecurrenttaxonomicframeworkanddevelopedintonewidentificationtools.ThesenewtoolswillleveragetheflexibilityandinteractivityofDeltakeysandonlinebrowsabledatabasessuchasEoLandWoRMS.Moreover,theywillbuildupontheframeworkoftheWoRMSdatabaseanddescriptivedatawillbemadeavailabletoWoRMSadministratorsforinclusioninsearchablemorphologicaltraitfields.ThedescriptionswillreflectfuturephylogeneticrevisionsastheyareadoptedbyWoRMSwhereweintendthatthecharactermatrixultimatelybearchivedandmadeopenlyavailable.WehopethatpilotsofsometoolsmightbeavailablefordownloadandtestingintimeforIPC13atLongBeach.ThisworkispartofalargerprojecttoproduceAnnelidaidentificationtools,supportedbyAustralianBiologicalResourcesStudygranttoElenaKupriyanova,ChrisGlasby,PatHutchingsandRobinWilson.49)OnanewspeciesofPolycirrus(Annelida:Terebelliformia:Polycirridae)fromthesouthwesternAtlanticJoãoM.M.Nogueira1,PlínioF.vanDeuren1,NatáliaRanauro1,&OrlemirCarrerette1,21InstitutodeBiociências,UniversidadedeSãoPaulo,SãoPaulo,Brazil;2InstitutoOceanográfico,UniversidadedeSãoPaulo,SãoPaulo,BrazilAnewspeciesofPolycirrusishereindescribed,fromspecimenscollectedoffthestatesofParaná(southernBrazil),SãoPaulo(southeasternBrazil),andPernambucoandParaíba(northeasternBrazil).Membersofthisnewspeciespresent31–43pairsofnotopodia,bearingpinnateandnarrowly-wingedchaetae,neuropodiabeginningonsegment9,bearingtype1uncinisensuGlasby&Glasby(2006)throughout,pairedventro-lateralglandularpadsonsegments3–13,andnephridialandgenitalpapillaeonsegments3–8.Afulldescriptionformembersofthisnewspeciesishereinprovided,togetherwithcomparisonswithindividualsofthemostsimilarcongenerspecies.

AnewspeciesofTerebellidesSars,1835(Annelida,Trichobranchidae)fromFrenchFrigateShoals,north-western50)HawaiianIslands,withadiscussiononthemorphologicalcharactersofmembersofTerebellidesJoãoM.M.Nogueira1,LeslieH.Harris2,&OrlemirCarrerette1,31InstitutodeBiociências,UniversidadedeSãoPaulo;2NaturalHistoryMuseumofLosAngelesCounty;3InstitutoOceanográfico,UniversidadedeSãoPauloAnewspeciesofTerebellidesisdescribedfromtheFrenchFrigateShoalsAtoll,PapahanaumokuakeaMarineNationalMonument,north-westernHawaiianIslands.Terebellidesfrenchfrigateshoalensisn.sp.,ischaracterisedbythereducedlowerlipwithdevelopedmarginallobe,almostinconspicuoussegment1andshortandcoiledabdomen.MembersofT.frenchfrigateshoalensisn.sp.arecomparedwiththemostsimilarcongeners,thosewithshortandcoiledabdomen,andalsowithindividualsofallthespeciesofthegenusreportedforareasrelativelyclosetoitstypelocality.Thosespeciesare:T.akares,T.balinensis,T.biaciculata,andT.brevis,fortheabdominalmorphology,andT.balinensis,T.ehlersi,T.horikoshii,T.intoshi,T.japonica,T.kobei,T.lineata,T.pacifica,andT.parvus,forthedistribution.TheDiscussionisaboutthe


52morphologicalcharactersofmembersofTerebellides,includingthevariationobservedamongmembersofspeciesofthisgenusfromotherlocalities,mostlyfromBrazil;thecharactersdiscussedare:theanteriorend,anteriorsegmentsandgeneralbodyshape,thebranchia,thepresenceofamid-dorsalhump,thenotopodiaandnotochaetae,andtheneuropodiaandneurochaetae.51)MultibranchiatePrionospiospeciesfromsoutheasternBrazilAntȏnioJoãoMalafaiaPeixoto&PauloCesardePaivaUniversidadeFederaldoRiodeJaneiroTheannelidfamilySpionidaeGrube,1850isverycommonandabundantinmarineecosystems,beingoneofthemostspecioseandecologicallyimportantfamilies.Spionidscanbefoundfromintertidalenvironmentstothedeepsea.ThegenusPrionospioincludesspeciesbearingonlypinnateorapinnatebranchiaeoracombinationofboth.Speciesbearingonlyapinnatebranchiaewereincludedinthe(nowinvalid)subgenusMinuspio,whichalsoincludedmostmultibranchiatePrionospiospecies.DuringasurveyonthecontinentalshelfandslopeoffsoutheasternBrazil,sevenmultibranchiatePrionospiospecieswererecorded.Twospecies,P.deltaandP.fauchaldi,havebeenpreviouslyrecordedinBrazil,whiletheremainingfivecorrespondtoundescribedspecies.Allspeciesdespitebeingmorphologicallysimilarcanbedistinguishedbytheprostomialshape,presenceofdorsalcrests,presenceofsabrechaetae,lamellaemorphology,andhookmorphology.52) AnewhostfortheparasiticgenusVeneriserva(Annelida:Dorvilleidae)fromAntarcticawatersAntȏnioJoãoMalafaiaPeixoto&PauloCesardePaivaUniversidadeFederaldoRiodeJaneiroTheannelidfamilyDorvilleidaeChamberlin,1919comprisesafewofthesmallestknownpolychaetes,beingpresentfromintertidalenvironmentstothedeepsea.Althoughmostspeciesarefree-living,therearesymbioticandparasiticspecies.ThegenusVeneriservaRossi,1984waserectedtoincludeV.pygoclavaRossi,1984,anendoparasiteofAphroditalongipalpaEssenberg,1917,offthecoastofCalifornia,USA.Thegenuspresentsreductionofthemaxillaryapparatus,reductionofparapodiaandchaetaeandlackofprostomialappendages.Asub-specieswaslaterdescribedtoAntarctica,parasitinganotherAphroditidaespecies.FourVeneriservaspecimenswerefoundinthecoelomiccavityofBarrukiacristata(Willey,1902),aPolynoidae.ThisisthefirstcaseofPolynoidaewormsbeingparasitizedbyanotherannelid.Itisunclearifourspecimensbelongtothesub-speciespreviouslyreportedfromAntartica,asdifferenceswereobservedontheprostomialshapeandmaxillaryapparatus.53)FirstrecordofprotodrilidpolychaetefromKoreaJiseonPark¹,TaeseoPark2,&JongwooJung¹,3

¹InterdisciplinaryprogramofEcocreative,EwhaWomansUniversity;2AnimalResourcesDivision,NationalInstituteofBiologicalResources;3DepartmentofScienceEducation,EwhaWomansUniversityMostofprotodrilidsareinterstitialandliveinthemarinesandenvironment.Theyhavenoparapodia,chaetaeandappendages.Thereare39speciesbelongingto6generarecordedworldwideandmostofthemarefoundinEuropeanwaters.InEastAsia,onlytwospecieswererecorded:onefromChinaandtheotherfromJapan.ThisisthethirdrecordinAsiaandthefirstrecordinKorea.WecollectedspecimensfromGangmunBeach,Gangneung-si,Korea.Withthemorphologicalanalysis,thisspecimenisconsideredtobelongtoProtodrilusbasedonitscharacteristicssuchasciliatedpalps,withoutpigmentedeyes,nuchalorgansdorsolateralandoval,andtwopygidiallobes.Toconfirmthisresult,sequencesofcytochromecoxidasesubunitIgene(COI)wasobtainedfrom4individualsandthenweperformedphylogeneticanalysisofthemtogetherwithsequencesofProtodrilusspp.retrievedfromGenBank.WeusedsequencesofAstomus,Claudrilus,Lindrilus,MegadrilusandMeiodrilusspp.asoutgroups.ResultsofmolecularanalysisrepresentthatKoreanspecimensareverycloselyrelatedwithotherspeciesofProtodrilus,whichsupportstheresultsofmorphologicalanalyses.Moreover,Koreanspecimensshowedsignificantgeneticdifferenceswithotherspecies(>19%).TheseresultssuggestthatKoreanspecimensofProtodrilusareprobablynewtoscience.54)ComparativetranscriptomicanalysisoffersinsightintogeneticcontrolofsyllidreproductionGuillermoPonzSegrelles1,RannyeleP.Ribeiro1,ChristophBleidorn2,&M.TeresaAguado21DepartmentodeBiologia(Zoología),FacultaddeCiencias,UniversidadAutónomadeMadrid;2DepartmentofAnimalEvolutionandBiodiversity,Georg-August-UniversityGöttingenOfthestaggeringlydiversereproductivestrategiesofannelids,perhapsnoneismoreinterestingthanthatofsyllids(Annelida,Syllidae).Duringtheirreproduction,syllidsnotonlyundergoepitoky-relatedmorphologicalchangesasthoseobservedinotherannelids(e.g.nereidids),but,insomecases,alsocreateindependentreproductiveunitscalledstolons.Thiscreatesauniquelycomplexlifecyclewhichhasbeenstudiedbymanyauthors.Severalstudiesduringthe80’sand90’sconcludedthattheprocessofstolonizationwasrelatedtoenvironmentalfactorssuchaswatertemperatureandmoon


53cycles,andthatthereisamale-as-defaulthormonalregulatorysystem.However,thephysiologicalandgeneticmechanismsbehindthisprocessarestilllargelyunknownandonlyrecentlytherehavebeenneweffortstotrytounderstandthisprocessinmoredetail.Inordertofindmechanismspotentiallyinvolvedinreproductiveprocessesinsyllids,weselectedfemale,male,andnon-reproducingindividualsofSyllisprolifera(stolonizing)andNudisyllispulligera(non-stolonizing)andusedthemforcomparativetranscriptomicanalyses.Forthat,weassembledtranscriptomesdenovo,annotatedthem,andcalculatedandcomparedexpressionvaluesforeachoftheassembledtranscripts.Thiscomparisonallowedustofindthatgeneexpressionisalteredtoagreaterextentinmalesthaninfemaleswhencomparedtothenon-reproducingindividuals,pointingtoasexdeterminationsysteminwhichnegativeregulationofgeneexpressionmightbeplayinganimportantrole.Finally,wealsousedthesedatatofindsex-specificchangesinGeneOntologycategoriesnotpreviouslyknowntoplayaroleinsyllidreproduction.55)Stress-associatedgeneexpressionintwomarineinvertebrates(HedistediversicolorandLittorinalittorea)exposedtometalcontaminationattheCallahanCopperMineSuperfundsite(Maine,USA)NancyPrentiss&TimothyBreton

UniversityofMaineatFarmingtonHedistediversicolor(Annelida;Polychaeta)andLittorinalittorea(Mollusca;Gastropoda)weresampled(2016-2017)fromtwospatiallynearbyestuaries–GoosePond(formerlyacopperminesiteandnowaSuperfundsite)andHorseshoeCove(a“non-contaminated”estuary).Metallevelsinsitesedimentswereassessedusingx-rayfluorescence.SevengenespreviouslyassociatedwithcopperandzincstressresponseswereassessedinH.diversicolor,withnosignificantdifferencesbetweensitesforanygenes.ThreesimilargeneswereassessedinL.littoreafootmuscleandhepatopancreas,withsignificantincreases(1.5-3fold)detectedinbothtissuesforGoosePondsnails.Thisresearchhighlightsthediversityofspecies-specificresponsestoenvironmentaltoxinsandtheneedforavarietyoftoxicityassessmentsinSuperfundsites.ResearchwasfundedbytheMaineIDeANetworkofBiomedicalResearchExcellence(INBRE),NationalInstitutesofHealth;Grant#P20-GM103423.56)NocturnallyswarmingCaribbeanpolychaetesfromSt.John,U.S.VirginIslands,USANancyPrentissUniversityofMaineatFarmingtonQualitativesamplesofnocturnallyswarmingCaribbeanpolychaeteswereconductedinshallowwatersintheVirginIslandsNationalPark,St.John,U.S.V.I.,atvarioustimesfrom2007to2017.Adultwormsattractedtounderwaterlightswerecollectedwithhand-heldplanktonnets.Whilethesamplingwasnotconductedonaquantitativebasis,anoverviewoftheresultsindicatesthatsomepolychaetes(e.g.Polyophthalmuscf.pictus)occurredinmostsamples,regardlessofthelunarphase,whilespeciesfromotherfamilies(Amphinomidae,GlyceridaeandPhyllodocidae)occurredonlyduringspecificlunarphases.Asummaryispresentedforthenocturnalemergenceofswarmingadultpolychaetes,whichincludesmembersfromthefollowingfamilies:Amphinomidae,Dorvilleidae,Glyceridae,Nereididae,Opheliidae,PhyllodocidaeandSyllidae.Researchwasfunded,inpart,throughVI-EPSCoR’sRII-NSFGrantNo.0814417.57)PolychaetesofBocasdelToro,Panama:updatesandnewrecordsNancyK.Prentiss1,LeslieH.Harris2,SergioSalazar-Vallejo3,&StudentsoftheSmithsonianTropicalFieldInstitutecourse:SystematicsandEcologyofCaribbeanPolychaetes1UniversityofMaineatFarmington;2NaturalHistoryMuseumofLosAngelesCounty;3ElColegiodelaFronteraSurPolychaeteshavenotbeenwelldocumentedalongthePanamanianAtlanticandPacificcoastlines.Theseregionsofferampleopportunitytodocumenttheoccurrenceofcommunityassemblages,whichoftenincludealienspeciesnotpreviouslyreported.Withover100yearsofshippingtrafficthroughthePanamaCanal,opportunisticspeciesfromthePacificOceanandelsewherehavebecomefirmlyestablishedinPanama’sCaribbean.Here,wepresentanupdatedrecordofpolychaetescollectedfromshallowwatersaroundtheBocasdelToroarchipelago.ThisrecordcombinestheresultsofcollaborativeinvestigationsconductedduringtwofieldcoursesorganizedbytheSmithsonianTropicalResearchInstituteduringJune2013andJuly2018,andbypreviousindependentinvestigations.WealsoreportnewrecordsforBocasdelToroandprovideupdatedinformationforpreviousrecords.ThisprojectwassupportedbytheSmithsonianTropicalFieldInstitute,BocasdelToro,Panama.58)EyeultrastructureinbasalannelidlineagesandtheirimportanceforeyeevolutioninAnnelidaGünterPurschke1,AnjilieBaller1,StepanVodopyanov1,2,TimvonPalubitzki1,&PatrickBeckers31DepartmentofZoologyandDevelopmentalBiology,UniversityofOsnabrück;2DepartmentofInvertebrateZoology,LomonosovMoscowStateUniversity;3InstitutueofEvolutionaryBiologyandEcology,UniversityofBonnRecentphylogenomicstudiesrevealedarobustandnewhypothesisexplainingannelidphylogeny.Mostsurprisingwastheexistenceofafewbasallineagesshowingacomparativelysimpleorganization.Inviewofthisnewphylogenytheevolutionof


54organsystemsinannelidsandthecharactersprobablypresentintheirlastcommonancestorhavetobereevaluated.Withrespecttothelightsensitiveorgansapairofsimplelarvaleyesandtwopairsofadulteyesisregardedasbeingpresentintheirlastcommonancestor.Typicallyadulteyesaremulticellularpigmentcuporpinholeeyesapplyingrhabdomericphotoreceptorcells(PRCs)andpigmentedsupportivecells(PSCs)inconversedesign.However,inthemostbasallineageseyesareonlypresentinalimitednumberoftaxaandthusfartheirstructurewasunknown.Ultrastructuralinvestigationsinmembersoftheselineages,OweniidaeandChaetopteridae,revealedacompletelydifferentbutcorrespondingstructureofeyesandPRCssheddingnewlightontheevolutionaryhistoryofadulteyesinAnnelida.Theeyesinspeciesofthisbasalradiationaresimplepigmentspoteyesandpartoftheepidermalepitheliumcomprisingtwocelltypes,monociliatedPSCsandrhabdomericPRCs.Bothcelltypesshowcharacteristicstypicalofepidermalsupportivecells.ThesefindingsindicatethattheannelidstemspeciesmostlikelypossessedapairofpigmentspoteyeswithslightlyspecializedPRCsand,asisthecaseforthenuchalorgans,pigmentcupadulteyespresumablyevolvedlaterinannelidphylogeny,namelyinthestemlineageofAmphinomidaandPleistoannelida.59)DistributionpatternsofGlyceriformia(Annelida)aroundIcelandGünterPurschke1,JanaS.Buhre1,&MarkusBöggemann21DepartmentofZoologyandDevelopmentalBiology,UniversityofOsnabrück;2DepartmentofZoology,UniversityofVechtaLittleisknownaboutthebenthicorganismslivinginthevastdeep-searegions.TheresearchprojectIceAGEfocusedonthebiodiversityintheclimaticsensitiveregionaroundIcelandanddifferentfactorsthate.g.influencespeciesdistributionandmigrationincorrelationwithecologicalconditions.However,itisafactthatpolychaetesareoneofthedominantgroupsinsuchhabitatsandespeciallyafewspeciesoftheannelidfamiliesGlyceridaeandGoniadidaearewidelydistributed.Thedistributionpatternsofthesetaxademonstratethatsomespecieshaveahighdispersalcapabilityandshowanextendedlevelofeurybathy,whereasotherspeciesarerestrictedtothedeepsea.Nevertheless,theunderlyingprocessesfortheoften-foundcosmopolitanoccurrencearemostlyunclear.Thepassivetransportbybottomoceancurrentsisgenerallyacceptedasthemainfactorfordispersal,whereasourstudiessuggestsurfacecurrentsasthemainreason.Totestthesecontraryhypotheses,extensivematerialfromtheIceAGEprojectwasinvestigatedbymorphologicalandmolecularmethods.TheusageofmarkerswithlowconservationlevelsliketheITS-sequencesgavefurtherinsightsinpopulationdynamicsandintraspecificvariations,whereashighlyconservedcodingregionswereusedtoexaminephylogeneticrelationships.Thecombinationofclassicaltaxonomictechniqueswithmodernaspectsofbiodiversityresearchallowsaprofoundanalysisoffactorsinfluencingthedistributionandmigrationofspeciesaswellastheinvestigationofthebackgroundofbiogeographiczonation.60)FirstrecordforthegenusSabidiusStrelzov,1973(Annelida:Paraonidae)forthesouthernAtlanticOcean,witharedescriptionofthetypespeciesanddescriptionofanewspeciesNatáliaRanauro1,RômuloBarroso2,PauloCesarPaiva2,&JoãoMigueldeMatosNogueira11LaboratóriodePoliquetologia(LaPol),DepartamentodeZoologia,UniversidadedeSãoPaulo;2LaboratóriodePolychaeta,DepartamentodeZoologia,UniversidadeFederaldoRiodeJaneiroThepresentstudyreportsanddescribestwospeciesofthegenusSabidiusStrelzov,1973,collectedfromoffsoutheasternBrazil,stateofEspíritoSanto,between19°3'S37°44'Wand21°10'S38°28'W.Sabidiusiscurrentlyknownonlyfromthetypespecies,S.cornatus(Hartman,1965),whichwasdescribedbasedonmaterialfromoffNewEngland,fromslopeandabyssalbottoms,between400-2900mdeep.ThepresentisthefirstrecordforS.cornatusandalsoforthisgenusfortheSouthernAtlantic,andtheshallowestaswell,from352-445mdepths.AnewspeciesoftheSabidiuswasalsofoundinthissurvey,from11-156mdepths,whichdiffersfromS.cornatusinhavinganantennaontheprostomiumandlargerbranchiaereachingtheanteriorchaetiger.ThepresentrecordexpandsboththegeographicalandbathymetricrangesofSabidius.61) DescribinganewspeciesofSyllisasapromisingorganismfordevelopmentalstudies(Syllidae,Annelida)RannyeleP.Ribeiro1,GuillermoPonz-Segrelles1,ConradHelm2,BernhardEgger3,&M.TeresaAguado1,21UniversidadAutónomadeMadrid;2Georg-August-UniversitätGöttingen;3UniversitätInnsbruckSyllidaeisaverydiverseannelidfamilyinnumberofspeciesandreproductivemodes.Mostsyllidspeciesreproducesexuallybyepitokybutalsoasexualreproductionhasbeenobserved.Specieswithasexualreproductionareabletoregeneratethewholebody,restoringallmissingparts,includingtheproventricle.Here,wedescribeanewspeciesofSyllis(Syllinae),withthecharacterizationofitsreproductionandlifecycle.Syllissp.n.iseasytomaintaininaquariaandcultures,asthespecimensmultiplyquicklyduetotheabilityofasexualreproductionbyfission.WegeneratedanupdatedmolecularphylogenyofthesubfamilySyllinaeincludingallspecieswithavailablesequencesinGenBankandSyllissp.n.TheresultsindicatethatthenewspeciesisthesistergroupofacladecontainingS.hyalina,TyposyllisgerundensisandS.armilarisfromtheMediterraneanSea.ThelifecycleofSyllissp.n.isveryinterestingandcomplex,becauseitrequirestheabilitytoregenerateatdifferentdevelopmentalstages.AsSyllissp.n.seemstobeapromisingspeciestostudyregenerationanddevelopment,wesequenced


55andassembleditstranscriptomeandmitochondrialgenomeasvaluablesourcesofdataforevolutionarydevelopmentalbiologystudiesinAnnelida.62) ThreadlikecastsinthetubewallofProtula(Serpulidae,Polychaeta)frombathyalcoralmoundsintheCaribbeanSeaRossanaSanfilippo1,AntoniettaRosso1,AgostinaVertino2,LydiaBeuck3,AndrèFreiwald3,4,&AdrianoGuido51DepartmentofBiological,GeologicalandEnvironmentalSciences,UniversityofCatania;2DepartmentofGeology,GhentUniversity;3SenckenbergamMeer,MarineResearchDepartment,UniversityofWilhelmshavenany;4MARUM,UniversityofBremen;5DepartmentofBiology,EcologyandEarthSciences,UniversityofCalabriaAnintriguinginteractionbetweenProtulatubesandsomethreadlikeepibionts(ofstilluncertaindetermination)isheredescribedforthefirsttimefromdeep-seacoralmounds,intheCaribbeanSea.Interactionissuggestedbythepresenceofembedmentstructures,i.e.bioclaustrations,producedbythewormontheexternalsurfaceofitstubewall.Thesestructuresconsistofthintubularcasts,ca.10-15micronininnerdiameter,developedtoformeitherirregularlyintricatenetsoverallthetubesurface,orregularreticulatenetworksinsidetheprotrudingornamentations(roughlyannularridgesandwrinkles)typicaloftheProtulagenus.Atplaces,anorganicfilm,presumablycorrespondingtotissueresiduesoftheunknownfiliformorganismswhichbecomeembeddedinthegrowingwormtube,stilloccursinsidethelumensofthecasts.InvestigationswillelucidateifbioclaustratedorganismsarehydroidcoloniesthatlivedonProtulatubescontemporarilywiththeirgrowth,asalreadyknowninliterature.Thesymbioticrelationshipsbetweentheseinfestantmicrorganismsandthehostingserpulidarediscussed.63)Polydoridspecies(Annelida:Spionidae)associatedwithcalcareoussubstratesfromNormandy,FranceWakaSato-Okoshi1,KenjiOkoshi2,Jean-ClaudeDauvin3,&HirokazuAbe41LaboratoryofBiologicalOceanography,GraduateSchoolofAgriculturalScience,TohokuUniversity;2DepartmentofEnvironmentalScience,TohoUniversity;3UniversityofCaenNormandyUniversity,LaboratoireMorphodynamiqueContinentaleetCôtière;4DepartmentofBiology,IwateMedicalUniversityMorphologicalandecologicalcharacteristicsandmolecularanalysisofpolydoridspecies(Annelida,Spionidae)wereinvestigatedalongthecoastofNormandy,EnglishChannel,FranceinMarch2018.TotallyeightspeciesofpolydoridsfromfourgeneraPolydora,Dipolydora,BoccardiaandBoccardiellawereobservedtoinhabitthevariouscalcareous-relatedsubstrates.PolydorahopluraClaparède,1868,P.cf.websteriandD.giardi(Mesnil,1893)werethemostcommonspeciesextractedfromtheshellsofculturedoysterCrassostreagigas(Thunberg,1793).OneunknownPolydoraspecies,whichisoneoftheP.ciliata/webstericomplexfrombothmorphologicalandgeneticpointsofview,wasdiscoveredfromlimestones,wildoystershellsfrommuddyoysterbedsandalsofromculturedoystershells.Thisunknownspecieswasobservedtobeabundantineachhabitatconditionandshowedvariationinpigmentationpatternsandsize.Polydorahoplura,D.giardi,Dipolydorasp.,B.proboscidea(Haswell,1885),B.pseudonatrixDay,1961whichisanewspeciesrecordedintheEnglishChannelandB.hamata(Webster,1879)werecommonlyobservedfromwildconditions.OnlyindividualsofB.proboscideawhichinhabitedtheareascoveredwithcorallinealgaepossessedgametocytesintheircoelomandmanyeggcapsulesandjuvenileswereobservedduringthesamplingperiod.FewindividualsofP.hoplurahadoocytesinthecoelom.Theseobservationssuggestedasoonspringreproduction.64) Identification,distributionandabundanceofaninvasivewormusedasbaitintheKnysnaestuary,SouthAfricaHendrévanRensburg1,ConradMatthee2,&CarolSimon11DepartmentofBotanyandZoology,UniversityofStellenbosch;2AnchorEnvironmentalConsultants,CapeTownManagementofthebaitspecies,moonshineworm,inKnysnaEstuaryisinhibitedbyconfusionoveritsidentityandlackofpopulationdata.Thisstudyaimedtofillthesegaps.Morphologicalandmolecularevidence(16SandCOIDNA)confirmedthatitisDiopatraaciculata,firstdescribedfromAustralia.Thespeciesisdefinedbyitslongpalps,antennaeanddorsalcirriandshortbranchialregion.Diopatraaciculatawasfoundthroughoutmostofthe14kmlongestuary,butnotintheupperreaches.Whiledensitiesweresignificantlyhigheratintertidalthansubtidalsites,therewasnoobviousspatialpatternofdensityalongthelengthoftheestuary.Giventhelargesize(max800mmlong)andpopulationestimateofatleast20millionworms,itmaysignificantlyaffecttrophicandecologicalstructuresintheestuary.Thelargeestimatedpopulationsizesuggeststhateradicationwouldbedifficult,furtherhinderedbyasubtidalpopulationthatmaymaintaintheintertidalpopulation.


5665) CompositionanddiversityofpolychaeteassemblagesinthecontinentalshelfofthesouthernMexicanPacificPabloHernández-Alcántara1,FranciscoF.Velasco-López1,VivianneSolís-Weiss2,&LeónF.Álvarez-Sánchez31UnidadAcadémicadeEcologíayBiodiversidadAcuática,UniversidadNacionalAutónomadeMéxico;2UnidadAcadémicadeSistemasArrecifales,UniversidadNacionalAutónomadeMéxico;3UnidaddeInformáticaMarina,UniversidadNacionalAutónomadeMéxicoForthisstudy,38stationsbetween42and109mdepthwereorderedalong14transectsperpendiculartothecoastlineofthecontinentalshelfinthesouthernMexicanPacific,withtheaimtostudythespatialvariationsofthecompositionanddiversityofthelocalpolychaetepopulationspresent.Atotalof3741specimensfrom82speciesand27familieswereidentified.Densityandspeciesrichnessvaluesshowedamplevariability(2–417ind./0.1m²;1–24spp./sta.)andexponentiallydecreasedwithdepth(R2=0.45and0.54,respectively).However,theaveragedistinctnessdiversityincreasedwithdepth(Delta+:70.3-100)duetothefactthatmostofthespeciesbelongedtodifferentgenera,whichsuggestsgreatermorphologicaldiversityofpolychaetes.Linopheruskristiani(1359ind.0.1m-2),mainlyoccurringatthemiddleandoutershelf,andParaprionospiopinnata(1338ind.0.1m-2),mostlylocatedinshallowdepths,wereclearlythedominantspecies.Besidesthesepolychaetes,thefaunalassemblagesweresignificantlystructured(ρ=0.951)byAglaophamusverrilli,Cossurabrunnea,Hermundurariojai,MagelonamarianaeandM.pacifica.Thespatialchangesinnumberofspeciesandtaxonomicdistinctnesswereslightlycorrelatedwithdepth(ρ=0.4and0.2)andsandpercentage(ρ=0.35and0.2),anddensityvalueswithdepth(ρ=0.3)andphosphatelevels(ρ=0.26).66) Spatialandbathymetrictrendsinpolychaeteassemblagesfromdeep-seaofthesouthernGulfofCalifornia,easternPacificAraceliJaquelínMercado-Santiago1,PabloHernández-Alcántara2,&VivianneSolís-Weiss31FacultaddeCiencias,UniversidadNacionalAutónomadeMéxico;2UnidadAcadémicadeEcologíayBiodiversidadAcuática,UniversidadNacionalAutónomadeMéxico;3UnidadAcadémicadeSistemasArrecifales,UniversidadNacionalAutónomadeMéxicoThepolychaeteassemblagesfromthedeepseaofthesouthernGulfofCaliforniawerecharacterizedintermsoffaunalcomposition,speciesrichnessanddistributionalpatterns.Duringthespringseasonof2012and2013,15stationslocatedbetween238and2900mdepthweresampled.Atotalof85speciesbelongingto59generaand26familiesofpolychaeteswereidentified.ThefamiliesOnuphidae(11spp.),Spionidae(10spp.)andCirratulidae(8spp.)weretherichestinspecies,whilethefamiliesParaonidae(119.04ind./0.1m2),Spionidae(95.23ind./0.1m2),Lumbrineridae(73.80ind./0.1m2)andPilargidae(69.04ind./0.1m2)werethemostabundant,representing51.9%offauna.Thenumberofindividualsandspeciesdisplayedaninverseparabolicdistributionwithdepth,withthelowestvalues(4.76–42.86ind./0.1m2;2–6spp.)atmiddledepths(651–915m).Threefaunalassemblagesdefinedbythebathymetriclevelsweredetected(RANOSIM=0.405,p=0.04):1)Prionospioehlersi-Subadytemexicana-Syllisalternata,locatedatstationslowerthan348m;2)Aricideasp.A-Ninoejessicaelocatedbetween651and915mdepth;and3)Aglaophamuspaucilamellata-Aricidea(Acmira)simplex-Ancistrosyllisgroenlandicadistributedatmorethan1335mdepth.67)PolychaetesfromunderwatermarinecavesnearMarseille(France,Mediterranean)AlexanderTzetlin1,AnnaZhadan1,ElenaVortsepneva1,LaurentVanbostal2,ThierryPerez2,AlexanderEreskovsky2,&PierreChevaldonné21M.V.LomonosovMoscowStateUniversity;2IMBE,Aix-MarseilleUniversiteWeinvestigatedpolychaetousannelidsfromsoftsedimentinthreeunderwatermarinecaveslocatednearMarseilleandLaCiotat(CalanquesNationalPark-NWMediterranean):3PPCave,JarreIIIСave,PérèsCave.Todifferentdegrees,thesecavesmimicdeep-seaenvironmentalconditionsandtheyarefamousbypresenceofcarnivorousspongesofthefamilyCladorhizidae.Weprocessedsamplesbyusingmeiobenthicprocedures(130-µmsieve).Thesamplesobtainedin2007werecomparedwiththosecollectedin2018-2019.Weidentifiedrepresentativesof29families:24familiesinthe3PPCave,23inJarreIIICave,9inPérèscave.OweniidaeandFabriciidaearenewlyreportedfrommarinecaves.Thespecificcompositionofpolychaetefaunaofthecavesispeculiaranddiffersfromsurroundingbiotopes.Thelistsoffamiliesfor2007and2018-2019yearsaresimilar;itmeansthecavepolychaetefaunaisstableovertime.Thefurtherstudieswillincludeidentificationsofpolychaetestospecieslevel,moleculargeneticanalysisandcomparisonsofcavefaunawithonefromdeep-waterMediterraneantrenches.68)ComprehensivestudyoftheheadregionandtentacleapparatusinOweniaborealis(Annelida:Oweniidae)ElenaTemereva1,AlexanderTzetlin1,&VyacheslavDyachuk21M.V.LomonosovMoscowStateUniversity;2NationalScientificCenterofMarineBiology,VladivostokTheorganizationoftentacleapparatusinbilateriansmayhelptounderstandthemorphologyofthelastcommonbilaterianancestor(LCBA).ThemainquestionisifLCBApossessedtentacleapparatusornot.Oweniidaeiscladeofannelidswith“basal


57radiation”,whichmightretainsomeancestralfeaturesoftheLCBA.TheorganizationoftentaclesofOweniaborealisisstudiedbyCLSM,SEM,TEM,and3Dreconstructions.Thetentacleapparatusconsistsof4pairsofarms,whicharelocatedlaterallyanddividedintoleftandrightgroupsbyindistinctdorsalridgeandventralpharyngealorgan.Thelatterconsistsoftwoparts:thedorsallipandtheventralpouch,whichcontainstheinnercavityandhasadifferentorganizationoftheventralandthedorsalepithelium.Thepharyngealorganissurroundedbyventro-laterallips.Oralsideoftentaclesandventro-laterallipsarecoveredbynumerouscilia,whereasthepharyngealorganlackscilia.Therearetwonerverings:innerandouter.Eacharmisinnervatedbysixthicknervesandmanythinneurites,whichstartfromtheouternervering.Thecoelomicliningoftentacleisformedbyspecializedcoelotheliumandmyoepithelialmonociliatedcells.Thespecificityoftentaclesorganizationi.e.theabsenceofspecializedzonesalongtentacle,independentinnervationoftentacles,thehistologicalsimplicityofcoelomicliningandnerveringsinO.borealismaybeevidenceoftheancestralstateorunspecializedtentacleapparatus,whichwasusedforfoodparticlescollection,howtheLCBAprobablydid.TheRussianScienceFoundationsupportsthisstudy(#18-14-00082).69)Revisionofthreenereididspeciescomplexes(Nereididae):reinstatementoftwogenera,anddescriptionofonenewgenusandsixnewspeciesTulioF.Villalobos-GuerreroDepartamentodeSistemáticayEcologíaAcuática,ElColegiodelaFronteraSurNereididsareamongthepolychaeteswiththehighestnumberofgeneraandspecies;nevertheless,thetaxonomyofseveralheterogeneoustaxaremainpoorlyunderstoodbecausearobustmorphologicalframeworkisnotstillestablished.Thespeciescomplexeswithinthefamilyarecommonexamplesofrelatedspeciesgroupingswithunclearmorphologicalboundaries.Amongthem,thecomplexes‘Neanthesacuminata’,‘Alittasuccinea’and‘Alittavirens’requireconsiderationasforbeingthenominalspeciesregardedaswidelydistributed,invasive,orappreciatedbythemaritimeindustries,respectively.Inordertoassesstheirconvolutedtaxonomyandtoclarifythestatusofother30closelyrelatedspecies,acomprehensivemorphologicalstudyofthosethreecomplexesareperformedbasedupontheexaminationoftypeandnon-typematerials.Thisrevisionunveilsthestateoftaxonomynotonlyatthespecieslevel,butalsotogenus.Alittaisredefinedtoincludeexclusively7speciesrelatedtoA.virens(typespecies).Stratoniceisreinstatedtotransfer13speciessimilartoA.succinea,includingthetypespeciesofNectoneanthes,andtoallocate3newspecies.Neanthioides,whosetypespecieswasaformerjuniorsynonymofN.acuminata,isreinstatedanddistinguishedfromNeanthestoinclude6species(2newones).Finally,anewdeep-seagenussimilartoNeanthioidesisestablishedforonenominalandanewspecies.Hence,27redescriptionsareprovided,11speciesarereinstated,and25newcombinations,3synonymies,and6newspeciesareproposed.AmorecomprehensivetaxonomicpanoramaofAlittaispresented,andthestatusofthespeciescomplexesarealsoelucidated.70) Aremarkablenewdeep-seanereididwithbranchiaeTulioF.Villalobos-Guerrero1&GregW.Rouse21DepartamentodeSistemáticayEcologíaAcuática,ElColegiodelaFronteraSur;2ScrippsInstitutionofOceanographyAnewgenusandspeciesofnereididfromoffthePacificcoastofCostaRicaaredescribed.Maleepitokesswimmingneartheseafloor(1000mdepth)werecollectedandvideorecordedusingtheHOVAlvin(operatedfromR/VAtlantis)inOctober2018.Epitokeswerealsoobservedsomemonthslater.Threeepitokemalesandoneinfaunalfemalehavebeenexamined.Themalesinterestinglyexhibitsbranchialfilamentsinthecirrostyleofbothdorsalandventralcirri,auniquefeatureamongnereidids.Themalesalsohaveacompleteprostomium,elongatedorsalligules,verylongneuropodialhomogomphfalcigers,enlargedcirrophoreofdorsalcirri,neuropodiawithonlypostchaetallobe,conicalparagnathsonbothpharyngealrings,markedepitokalmodifications,andlackseyes.ThepresenceofbranchiaeisexceptionalwithinNereididae,onlyDendronereisandDendronereidessharethisfeature.However,incontrasttothenewtaxon,theseemergefromthecirrophoreofdorsalcirri.Likewise,pharyngealpapillaeareonlypresentinthosetwogenera,theprostomiumisindented,thefalcigers(ifpresent)aremuchshorter,andatleastthreelobesaredevelopedinsomeneuropodia.PreliminarymitochondrialDNAanalysisrelatesthenewtaxawithTambalagamia,Laeonereis,HedisteandAlitta,butfurtherdataisneeded.Inadditiontothebranchiae,thenewtaxonisdifferentfromthesegeneraintheshapeofprostomiumandcirrophoreofdorsalligule,numberofventralcirri,andpresence/typeoffalcigersandpharyngealprojections.Furthermolecularanalysis,includingnucleargenesandmoregenera,willbeperformedinordertoassesstheplacementofthisextraordinarynereidid.71)DevelopmentalstagesofnotochaetaeandanteriorsegmentsinnectochaetelarvaeduringmetamorphosisinChrysopetalumspecies(Chrysopetalidae:Annelida)CharlotteWatsonMuseum&ArtGalleryoftheNorthernTerritoryChrysopetalumspeciesdisplayanadultmorphologyofnotochaetalpaleaeandtwopairsoftentacularcirrionsegments1and11.Nectochaetelarvaeexhibitaprimaryspinosenotochaetalmorphologyaftersettlementfromtheplanktonwhichis


58replacedduringmetamorphosiswithadultpalealnotochaetae.Atotalof6cirriarepresentonsegments1and11withbiramoussegment11comprisingapairofdorsalcirri,primarynotochaetae,neuropodiaandneurochaetae;ventralcirriareabsent.Duringmetamorphosisthechaetous,acirroseneuropodiaofsegment11arereabsorbedandreplacedinstageswithapairoftentacularcirrisoachievingthefinaladultstate:achaetoussegment1supportstwopairsoftentacularcirriandsegment11similar,ie.totalof8cirri.SpinosenotochaetaeindicateanoriginalstatebeforereplacementbypaleaeandtheoriginalanteriorsegmentalarrangementinlarvaeofChrysopetalumspeciesisthatseeninadultsinthemajorityofChrysopetalinaetaxa.72) ConfirmationofthemudwormPolydorawebsteri(Polychaeta:Spionidae)inoystersfromWashingtonState,USAJasonWilliams1,HeatherLopes2,JulietaMartinelli2,LorenzHauser2,IsadoraJimenez-Hidalgo2,TeriKing3,JaquelinePadilla-Gamiño2,PaulRawson4,LauraSpencer2,&ChelseaWood21HofstraUniversity;2UniversityofWashington;3WashingtonSeaGrant;4UniversityofMaineSomespionidpolychaetesinducemudblistersinbivalvesandpresentaneconomicburdentotheoysterindustry.Inparticular,PolydorawebsterihasnegativelyimpactedaquacultureoperationsinAustralia,NewZealand,Hawaii,andtheeastcoastofUSA.MudblistershavebeenobservedinPacificoysters(Crassostreagigas)fromWashingtonanddatasuggestthattheareamightbeexperiencinganoutbreakofP.websteri.ToconfirmtheidentityofthepolydoridsasP.websteri,weobtained600+Pacificoystersfrom14sitesandexaminedthemfortheworms.Inaddition,P.websteriwereextractedfromeasternoysters(Crassostreavirginica)collectedinNewYork(nearthetypelocality)forcomparativestudies.PolychaeteswerefixedforSEMandlightmicroscopyandsequenced(CO1and18SrRNA)forspecies-levelidentification.ThefindingsrepresentthefirstconfirmedreportofP.websteriinoystersfromWashingtonandhaveimportantimplicationsforthehalf-shellindustry.73) InterstitialnerillidsgoneswimminginthedarkM.J.Hansen1,O.Axelsen1,M.Mizuyama2,K.Kakui3,Y.Fujita4,&K.Worsaae11UniversityofCopenhagen;2UniversityoftheRyukyus;3HokkaidoUniversity;4OkinawaPrefecturalUniversityofArtsAnchialinecaveshaverevealedavarietyofhighlyadaptedanimalsincludingmultiplerecordsofNerillidae.However,onlyonestygobiticlineage,Speleonerillanom.nov.(previouslyknownasS.longipalpa),seemsobligatetothisenvironment.Contrarytotheirbenthicandinterstitialnerillidrelatives,speciesofSpeleonerillaarepredominantlyfoundinthewatercolumn.WenowhaverecordsfrommultipleanchialinecavesacrosstheCaribbeanandin2018describedthreenewspeciesfromBahamas,CubaandCanaryIslands.Recently,wealsofoundanewnerillidinananchialinecaveinMiyako(SouthernJapan).ItshowstraitscharacteristicofbothMesonerillaandSpeleonerilla,havingcompoundchaetae,threeantennaeandlongpalps.Ourcombinedmolecularandmorphologicalanalyseswillshowwhetheritrepresentsaseparateevolutionarylineage.Nonethelessitemphasizestheworldwideadaptabilityofnerillidstotheanchialineenvironment,wheretheydominatetheanneliddiversity.74)Coralreef-associatedinfaunalpolychaetesinthewesternGulfofThailandThamasakYeemin,MakamasSutthacheep,SittipornPengsakun,WanlayaKlinthong,LaongdownJungrak,&RattanawadeeNiamsiriRamkhamhaengUniversityEcologicalinteractionsbetweenthecoralreefandsedimentfaunaarerecognizedasimportantfactorsinfluencingthestructureandorganizationofmarinecommunities.Polychaetesaremajorcomponentsofcoralreef-associatedinfaunalmacroinvertebrates.Thisstudyaimedtoexaminethecompositionandabundanceofcoralreef-associatedinfaunalpolychaetesintheWesternGulfofThailand.ThepolychaetesampleswerecollectedbySCUBAdiversatfourreefsites,i.e.KoKula,KoLawa,KoRangKachiu,andKoMaphraoinMuKoChumphon.Thetotaldensitiesofinfaunalpolychaeteswereinarangeof378-1,389individualsm-2.ThehighestdensitywasfoundatKoMaphraowhichisanearshoreisland.ThedominantpolychaetefamiliesincludedMagelonidae,Capitellidae,Opheliidae,Pisionidae,Nephtyidae,andAmphinomidae.Thisstudyhighlightstheimportanceofcoralreef-associatedinfaunalpolychaetesintheGulfofThailand.

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ListofIPC13ParticipantsHirokazuAbeIwateMedicalUniversityJAPANhabe@iwate-med.ac.jpArturoAlvarezAguilarUniversidadAutónomadeBajaCaliforniaMEXICOalvarturo@gmail.comPauloAlvesUniversidadeFederalFluminenseBRAZILpauloalves@id.uff.brTomAlvestadUniversityMuseumofBergenNORWAYtom.alvestad@uib.noKanakiAmeiHokkaidoUniversityJAPANkanakoamei@eis.hokudai.ac.jpLyndaAveryInfaunaDataAUSTRALIAinfaunadata@westvic.com.auConxitaAvilaUniversityofBarcelonaSPAINconxita.avila@ub.eduTorkildBakkenNorwegianUniversityofScienceandTechnologyNORWAYtorkild.bakken@ntnu.noRomuloBarrosoUniversidadeFederalRuraldoRiodeJaneiroBRAZILbarroso.romulo@gmail.comKelvinBarwickOrangeCountySanitationDistrictUSAkbarwick@ocsd.comPatrickBeckersUniversityBonnGERMANYPbeckers@evolution.uni-bonn.de

JamesBlakeAquaticResearch&ConsultingUSAjablake9@gmail.comViktoriaBogantesAuburnUniversityUSAveb0007@auburn.eduRafaelBonaldoUniversityofCampinasBRAZILrafaeldeoliveirabonaldo@gmail.comElizabethBordaTexasA&MUniversitySanAntonioUSAlizborda@gmail.comChristineBorenLosAngelesCountySanitationDistrictUSAChristineBoren@lacsd.orgPolinaBorisovaP.P.ShirshovInstituteofOceanologyRussianAcademyofSciencesRUSSIAsalixhastata@ya.ruShannonBrownKingAbdullahUniversityofScienceandTechnologySAUDIARABIAshannon.brown@kaust.edu.saNataliyaBudaevaUniversityMuseumofBergenNORWAYnataliya.budaeva@uib.noAlessiaCaterinaCiraolo MemorialUniversityofNewfoundlandCANADAacciraolo@mun.caMarinaCoutinhoUniversidadeFederalFluminenseBRAZILmarinacoutinho88@gmail.com

60JoostDanielsMontereyBayAquariumResearchInstituteUSAjoost@mbari.orgTeresaDarbyshireAmgueddfaCymru-NationalMuseumWalesWALES,UKteresa.darbyshire@museumwales.ac.ukDanielDauerOldDominionUniversityUSAddauer@odu.eduJenniferDavenportWoodEnvironment&InfrastructureSolutions,[email protected] ClarksonUniversityUSAadavid@clarkson.eduMariaDeanCoeCollegeUSAmdean@coe.eduMarthaEverettM.V.LomonosovMoscowStateUniversityRUSSIAmarfa.everett@yandex.ruAlejandroFernandez-Romero UniversityofSevilleSPAINafernandez66@us.esKirkFitzhughNaturalHistoryMuseumofLosAngelesCountyUSAkfitzhugh@nhm.orgMarceloFukudaMuseudeZoologia-UniversidadedeSãoPauloBRAZILmvfukuda@usp.brWilliamFurlongLosAngelesCountySanitationDistrictUSAbfurlong@lacsd.org

RobertGamberOrangeCountySanitationDistrictUSArgamber@ocsd.comGlenysGibsonAcadiaUniversityCANADAglenys.gibson@acadiau.caBrettC.GonzalezNationalMuseumofNaturalHistory,SmithsonianInstitutionUSAgonzalezb@si.eduLauraGonzalezOrtizUniversidadAutónomadeNuevoLeónMEXICOlauragortiz19@hotmail.comLironGorenTel-AvivUniversityISRAELgoren.liron@gmail.comFionaGowerCawthronInstituteNEWZEALANDFiona.Gower@cawthron.org.nzKarenGreenTierraDataUSAkgreen@tierradata.comCandaceGrimesTexasA&MUniversityatGalvestonUSAcg1478@tamu.eduLaetitiaGuntonAustralianMuseumAUSTRALIAlaetitia.gunton@austmus.gov.auBrentHagginCountySanitationDistrictsofLosAngelesCountyUSAbhaggin@[email protected]

61RachelHaleNationalInstituteofWaterandAtmosphericResearchNEWZEALANDrachel.hale@niwa.co.nzMaryColleenHannonTexasA&MUniversityGalvestonCampusUSAMCHannon23@tamu.eduLeslieHarrisNaturalHistoryMuseumofLosAngelesCountyUSAlharris@nhm.orgConradHelmUniversityofGöttingenGERMANYchelm@uni-goettingen.deNatsumiHookabeHokkaidoUniversityJAPANsofeechan312@gmail.comPatHutchingsAustralianMuseumAUSTRALIApat.hutchings@austmus.gov.auNaotoJimiHokkaidoUniversityJAPANbeniimo7010@gmail.comZhangJinghuaiSouthChinaSeaEnvironmentalMonitoringCenter(SOA)CHINA5635224@qq.comJyothiKaraStellenboschUniveristySOUTHAFRICAjyothi.kara@gmail.comAlexandraKerblMarineBiologySection,UniversityofCopenhagenDENMARKalexandra.kerbl@bio.ku.dkGenkiKobayashiSetoMarineBiologicalLaboratoryJAPANgenkikobayashi5884@gmail.com

GlafiraKolbasovaMoscowStateUniversityRUSSIAutricularia57@yandex.ruJerryKudenovUniversityofAlaskaAnchorageUSAjdkudenov@alaska.eduSabrinaKuhlRheinischeFriedrich-Wilhelms-UniversitätBonnGERMANYskuhl@evolution.uni-bonn.deElenaKupriyanovaAustralianMuseumAUSTRALIAelena.kupriyanova@austmus.gov.auRajKiranLakraPondicherryUniversityINDIArajkiranlakra@gmail.comPauloLanaUniversidadeFederaldoParanáBRAZILlana@ufpr.brNicolasLavesqueUniversityofBordeauxFRANCEnicolas.lavesque@u-bordeaux.frNorbertLeeLosAngelesCountySanitationDistrictsUSAnorbertlee@lacsd.orgRobertoAraujoLeyvaUniversidadAutónomadeBajaCaliforniaMEXICOosmar.araujo@uabc.edu.mxXinzhengLiInstituteofOceanologyChineseAcademyofSciencesCHINAlixzh@[email protected]

62AngelicaLopezMarineTaxonomicServices,Ltd.USAangelica@consultmts.comLarryLovellDancingCoyoteEnvironmentalUSAlllpolytax@gmail.comAndrewMackieNationalMuseumWales WALES,UKandrew.mackie@museumwales.ac.ukSaraMarkhamHillsboroughCountyEnvironmentalProtectionCommissionUSAmarkhams@epchc.orgDamhnaitMcHughColgateUniversityUSAdmchugh@colgate.eduIsabelCristinaMolina-AcevedoElColegiodelaFronteraSurMEXICOisacrismoliace@gmail.comJennaMooreFloridaMuseumofNaturalHistoryUSAjmoore@ufl.eduKateMortimerAmgueddfaCymru-NationalMuseumWalesWALES,UKKatie.Mortimer@Museumwales.ac.ukSerenaMuccioloUniversidadeFederaldoParaná[email protected]üllerRheinischeFriedrich-Wilhelms-UniversitätBonnGERMANYjmueller@evolution.uni-bonn.deTatianaNeretinaN.A.PertzovWhiteSeaBiologicalStationMSIRUSSIAnertata@wsbs-msu.ru

[email protected]ãoMigueldeMatosNogueira

UniversidadedeSãoPauloBRAZILnogueira@ib.usp.brErinOderlinCityofLosAngelesEnvironmentalMonitoringDivisionUSAerin.oderlin@lacity.orgKenjiOkoshiTohoUniversityJAPANkenji.okoshi@env.sci.toho-u.ac.jpPauloCesarPaivaUniversidadeFederaldoRiodeJaneiroBRAZILpaulo.paiva@gmail.comJiseonParkEwhaWomansUniversityKOREAjspark0406@hanmail.netBrunoPernetCaliforniaStateUniversityLongBeachUSABruno.Pernet@csulb.eduChristinaPiotrowskiCaliforniaAcademyofSciencesUSAcpiotrowski@calacademy.orgFredrikPleijelGothenburgUniversitySWEDENfredrik.pleijel@me.comPatriciaPocklington ArenicolaMarineLimitedUKarenicolamarine@gmail.comGuillermoPonzSegrellesUniversidadAutó[email protected]

63NancyPrentissUniversityofMaineatFarmingtonUSAprentiss@maine.eduGünterPurschkeUniversityofOsnabrückGERMANYpurschke@biologie.uni-osnabrueck.deNataliaRanauroUniversidadedeSãoPauloBRAZILnataliaranauro@gmail.comPaulRawsonUniversityofMaineUSAprawson@maine.eduRannyeleRibeiroUniversidadAutónomadeMadridSPAINrannyele.passos@uam.esGregRouseScrippsInstitutionofOceanographyUniversityofCaliforniaSanDiegoUSAgrouse@ucsd.eduErnestRuckmanOrangeCountySanitationDistrictUSAeruckman@ocsd.comRossanaSanfilippoUniversityofCataniaITALYsanfiros@unict.itRafaelSardá Centred'EstudisAvançatsdeBlanes–ConsejoSuperiordeInvestigacionesCientíficasSPAINsarda@ceab.csic.esWakaSata-OkoshiTohokuUniversityJAPANwsokoshi@tohoku.ac.jpKenSchiffSouthernCaliforniaCoastalWaterResearchProjectUSAkens@sccwrp.org

PaulSchroederWashingtonStateUniversityUSAschroede2003@yahoo.comAnjaSchulzeTexasA&MUniversityGalvestonUSAschulzea@tamug.eduElaineSeaverWhitneyLaboratoryforMarineBioscienceUSAseaver@whitney.ufl.eduCarolSimonStellenboschUniversitySOUTHAFRICAcsimon@sun.ac.zaJenniferSmolenskiCityofLosAngelesEnvironmentalMonitoringDivisionUSAjennifer.smolenski@lacity.orgVivianneSolisWeissUniversidadNacionalAutónomadeMé[email protected],viviannesw@gmail.comJosefinStillerUniversityofCopenhagenDENMARKjosefinstiller@gmail.comJixingSuiInstituteofOceanologyChineseAcademyofSciencesCHINAjxsui@qdio.ac.cnEkinTilicScrippsInstitutionofOceanographyUniversityofCaliforniaSanDiegoUSAetilic@evolution.uni-bonn.deAlexanderTzetlinM.V.LomonosovMoscowStateUniversityRUSSIAatzetlin@gmail.com

64TulioVillalobos-GuerreroElColegiodelaFronteraSurMEXICOtulio1786@msn.comHaiqingWangNorwegianUniversityofScienceandTechnology,[email protected]&ArtGalleryoftheNorthernTerritoryAUSTRALIAchrysopetalum@gmail.comChristineWhitcraftCaliforniaStateUniversityLongBeachUSAChristine.Whitcraft@[email protected]

R.PaulWolfVictoriaUniversityCoastalEcologicalLabNEWZEALANDwolfvermes@gmail.comKatrineWorsaaeUniversityofCopenhagenDENMARKkworsaae@bio.ku.dkGaoYangSouthChinaSeaEnvironmentalMonitoringCenter(SOA)CHINA5635224@qq.comThamasakYeeminRamkhamhaengUniversityTHAILANDthamasakyeemin@hotmail.com

65

Notes

69

ColleaguesRecentlyLost

JohnFredrickGrassle,1939-2018 DonaldJ.Reish,1925-2018 InstituteofMarineandCoastalStudies DepartmentofBiologicalSciences RutgersUniversity,USA CaliforniaStateUniversityLongBeach,USA (photofromwhoi.edu) (photocourtesyofLhisaReish) RobertEugeneRuff,1947-2017 AlexanderRzhavsky,1959-2018 RuffSystematics,USA RussianAcademyofSciences,Russia (photocourtesyofJimBlake) (photocourtesyofElenaKupriyanova)

OverviewoftheScheduleSunday4August(Hotelcheck-inarea) 1600−2000 Registration

Monday5August(Grand/WindsorSalons) 0700−1700 Registration 0730−0850 Breakfast 0850−0910 Welcomeaddress 0910−1030 Systematics&EvolutionI(4talks) 1030−1100 Break 1100−1220 Systematics&EvolutionII(4talks) 1220−1340 Lunch 1340−1500 EcologyI(4talks) 1500−1530 Break 1530−1630 EcologyII(3talks) 1630−1700 RemembranceofDr.DonaldReish 1700−1900 Welcomewine&cheesesocial(VerandahGrill/Deck)

Tuesday6August(Grand/WindsorSalons) 0730−0850 Breakfast 0850−1030 MorphologyI(5talks) 1030−1100 Break 1100−1220 MorphologyII(4talks) 1220−1340 Lunch 1340−1500 Systematics&EvolutionIII(4talks) 1500−1530 Break 1530−1630 Systematics&EvolutionIV(3talks) 1630−1700 HistoryoftheAllanHancockFoundation

Wednesday7August(Optionalmid-conferenceexcursion) 0800 BusdepartsQueenMary,toExpositionPark(meetinfrontofQMat0745) 0930−1200 ExpositionParkRoseGarden,CaliforniaScienceCenter,NaturalHistoryMuseum(onyourown) 1200 MeetatRoseGardenFountain;walktoWallisAnnenbergBuilding 1215−1330 LunchinMusesRoom 1330 WalktoAllanHancockFoundationatUniversityofSouthernCalifornia 1530 BusdepartsExpositionPark,toQueenMary

Thursday,8August(Grand/WindsorSalons) 0730−0850 Breakfast 0850−1030 Development&Regeneration(5talks) 1030−1050 Break 1050−1230 Physiology(5talks) 1230−1340 Lunch 1340−1510 Diversity&BiogeographyI(4talks)

1510−1540 RemembranceofDrs.FredGrassle,EugeneRuff,&AlexanderRzhavsky1540−1800 Postersession

Friday9August(Grand/WindsorSalons) 0730−0910 Breakfast 0910−1030 Diversity&BiogeographyII(4talks) 1030−1100 Break 1100−1220 Diversity&BiogeographyIII(4talks) 1220−1400 Lunch[IPCAdvisoryCouncilMeeting,VictoriaRoom] 1400−1500 IPAbusinessmeeting 1500−1510 Closingremarks 1800−2300 Banquet(Queen’sSalon)

Program & Abstracts - Natural History Museum

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