OPHlil.lA 46 (1): 1 1-34 (N,Iar-ch 1997)

THE VALVIFERAN ISOPODS (CRUSTACEAPERACARIDA) FROM BRANSFIELD STRAIT AND

ADJACENT WATE,RS, ANTARCTI CA

Ana Maria S. Pires (î Pc¿ulo Y. G. SumidaLrslituto occanos^r'hlict,,

"!;';;L;|;,,î,..i:;sj;l nut,,, (1.P. ô614e-0538e-e70

ABSTRACT

Eightecn spccies ol'r,alvifcr¿rn tnarin(: isopocls ((ìhactiliiclae, Pseucliclotheidire, Arcturiclzrc) lrornsix Br¿rz.ilian expcclitiorrs to Alltarctic¿ì ¿rre rcportccl. Three ncrv species ol ¡\rctr-rriclae at'e

ol pleopocls 1 ancl 2 f¡ot¡t DoLidti.st:t¿.ç ntetitLionnlis (Hoclgson, 1970), Ankncltt¡tt,.ç h,orri,rl,tt.ç seì'rnl,us

Branclt, 19!)0 zrncl Cltr¿elanl.u¡t.ts lot'tg'isþinostts Brandt, 1990 arc presenl"ec[, as tvcll as uetv records ofdescribecl spccies.

Kt1 ruouls: Isopoclzr, Valvilèra, Ch¿e tiliicl¿rc, Pseuclidotheiclzrc, At-cttu'idac, Brazilitrn Antarctic pro-

elanl, Blansfi<'l<l Str'¿rit. Àntlrlclic:r

INTRODUCTION

An annual Brazilian expedition has visited Antarctica since summer 1983. Thefirst six expeditiol-ìs were perforrned on the R/V "Prof. W. Besnard," fron-r Uni-versidade de São Paulo, arorlnd Shetland Islancls, Bransfield and Gerlachstraits, and solrth of Drake Passage. Isopods werc abundant in thc many bcn-thic samples collected, specially Valvifera. Among this material sixteen species

of Arcturidae were found, three of them new.Most papers on Antarctic isopods are concerned nith the systematics, taxon-

omy and distributior-r (Beddard 1886, Richardson 1906, 1913, Kussakin 1967,

Schultz 1978, 1982, George & Negoescu 1985, Wägele 1988, Bmndt & Wägele1988, Brandt 1990, among others). Fewer works deal witl-r other aspects of biol-ogy slrch as life cycle, feeding, colonization and e\/olution (Dearborn 1967,

Cals 1977 , Luxmoore 1982, Wägele 1987).This paper lists the species compositior-r and distribution of Isopoda Valvife-

ra collected in the Atlantic Sector of the Antarctic Ocean, during the first sixBraziliar-r Antarctic expeditions (PROANTAR Program I to VI), and describesthree nerv species. Other groups (Flabellifera, Anthuridea, Gnathiidea ancl

Asellota) will be dealt r,vith in a later publication.

12

The isopods \vere sampled in the Antarctic slrmmers of 1983 to 1988, fromsites in Bransfreld Strait, the vicinities of Palmer Archipelago and the southernpart of Drake Passage (Table 1). In 1987 and 19BB special attention rvas paid tothe benthic fauna of Admiralty Bay, I(ng George Island. A detailed report onsampling sites of thc firsf six Rrazilian Antarctic expeditions is founcl in Non-ato et al. (1992).

Several methods 'were used for obtaining benthic samples. In deeper sta-

tions (60 to 'c20 m) a beam trawl, an otter trarvl and a 0.1 m2 vanVeen grabwere employed. Diving and traps were used in shallorver places (less than 25

m). The animals were sortecl out and fixed in I0% formaldehyde.The type material is deposited in the follorving institutions: Museu de Zoolo-

gia, lJniversidade cle São Pzrulo (MZSP), Vluseu Nacional do Rio de Janeiro(MNRJ), and Instituto Oceanográfico da lJniversidade de São Paulo (IOUSP).

RESULTS

Of the 62 benthic stations visited, 43 had isopods and 27 valviferans. Valviferawas tlre second most nume lous group with 26% of the number of individualsand 18 species. Table 1 shows locations, date, gear employed, and physicalparameters at the sampling stations rvhere vah,iferans occurred. ¡\ list of thevah,iferan species and their distribution in the area is presented in Table 2.

Family Arcturidae, D oliclt.is cus Richardson, 1913

Dolichisctts ferrazi sp.n. (Figs. 1-22)

N[ate'rictl exantinecl. Antarctica, northeast of Joinville Is., St. 4381 (62'48'S54"20'W),280 m depth, 18.01.1983, R/V "Prof. !V. Besnard" coll (holotypemale, NIZSP 12174); St. 4861 (61"02'S, 54'55'W), 362 m depth, 01.02.1986,R/V "Prof. W. Besnard" coll (1 paratype male, 1 female, MZSP 12775); St.4862 (61"08'5,54"34'W),240 m deptl-r, 01.02.1986, R/V "Prof. W. Besnard"coll (1 paratype male, l female, MNRJ 8572);5r..4872 (63'28'S,62'31'W),168 m depth, 13.02.1986, R/V "Prof. W. Besnarcl" coll (1 paratype male, 1

female,IOUSP 232).

Desuþtion. Holotype male,30 mm long (Figs. 1,2). Pereonite I fìrsed to head,cephalothorax nearly half pleon length. Cephalothorax dorsal surface r,vith

oval depression on anterior 3/+,2 small elevations centrally on poster-ior quar-te¡ single large elevation on fused pereonite I, supraocular spines lacking;fused pereonite I having row of dorsodistal short spines. Pereonites slightlyincreasing in length from II to IV, decreasing from V to \rII, rorv of shortspines on dorsodistal margins; fttsed pereonite I lateral margins n'eakly pro-trucling. Pleonites 1-2 fusion dorsally indicated by trvo ror,vs of short spines.

A. N,I. S. PIRES & P. Y G. SUVIIDA

N{ATERIAL AND METHODS

ANTARCTICVALVIFERAN ISOPODS 13

Table 1. Station list including environmental parameters measured. ts'l'= tseam'I'rawl; 'I'='Iiap;OT = Otter Trawl.

Station Position

4381 62"48',S54"20',W

4465 61"44',S5'1"52'.W

4743 62"30',S54"17',W

Ferraz 62"05'S58'23',30 "W

Snow I.4860 61'08',S

55.52'W4861 61"02',S

54'55',W4862 6l"0B',S

54"34',W4863 6l'17',S

54"53',W4864 63'01',S

54"49',W4865 62'55',S

55'16',W4866 62'53',S

56"27',W4867 62"57',5

56'50',W4868 63'24',S

59"04',W4870 63"26',S

59.32'W4B7t 63"16',S

59"55',W4872 63"28',S

62"31',W4873 63"25',S

62"05',W4874 63"25',S

62"19',W4875 63"17',S

62"30',W5027 62"05.3',S

58"21.9',W5030 62"05.8',S

58"26.6',W5036 62"08.5',S

58"25.6',W5052 62'26.5',S

59"16',W5053 63"52',S

60'19',W5054 63'44',S

60"25',W5062 61"12',S

55"40',W

Date

18.01.83

23.01.84

28.01.85

03.02.85

08.02.8531.01.86

01.02.86

01.02.86

02.02.86

02.02.86

03.02.86

03.02.86

03.02.86

08.02.86

08.02.86

08.02.86

13.02.86

13.02.86

14.02.86

14.02.86

13.02.87

14.02.87

77.02.87

24.02.87

25.01.BB

25.01.88

26.02.87

Depth (m)

280

310

412

20

80112

362

240

180

275

B2

194

95

96

135

264

168

66

135

157

125

85

460

212

T ('C)

-2.07

-0.34

-0.76

0.7).

-0.59

1.28

0.64

0.84

-0.55

-0.46

-0.40

-0.22

-0.29

-0.52

0.60

1.30

0.97

7.71

0.42

0.42

0.05

-0.87

-),.32

S (Voo)

34.48

34.55

34.64

34.49

34.59

34.59

34.56

34.47

34.37

34.42

34.48

34.65

34,48

34,43

34.42

35.49

34.45

34.46

33.95

34.75

34.37

34.49

34.62

Gear

BT

BT

BT

T

BTOT

BT

BT

BT

BT

BT

BT, OT

BT

BT, T

BT

BT

BT

BT, OT

BT, OT

BT

BT

104

108

98

BT

BT

OT

OT

OT

OT

t4 ,À. N,I. S. PIRIS & P. Y. G. SUN4ID¡\

Figs. 1-9. Dolichisct¿s fennzi, new species. 1-2, holotype , aclttlt male, 30 mn'r lor-rg; 3-9, paratyPe,

achrlt male, 29 rnrr-r long. 1, bod1,, ¡¡o.ru1 vierv; 2, bocl1,, l¿¡st.1 vierv; 3, antenlla 1; 4, antenna 2; 5

riellt mzrrìclible ; 6, lefi rnanclible; 7, n-raxilla 1; B, maxilla 2 rvith setae in detail; 9, niaxillipecl.

Coxal plates witl'r conspiclroì.ts dorso-postcriol spirre. Telsorr Lriarrgular, clistal

third with central spine, apex rounded.An[enna I (Fig.3). Pedunculararticle I about 1.5 times longer than article

3, with 3 distal and single lateral short spines, lateral mar:gins fringed with fir-re

setae; article 2 twice as lor-rg as bare article 3, few sparse short setae clistally. Fla-

gellurn with 2 articles, first sholt, ringlike: terminal article elongate, r'rearly

[rvice as long as first peduncular article, u'ith lateral rotv ol'23 zresthetascs.

Ante nna 2 (Fig. 4). First 3 peduncular articles short, bare , last 2 articles verylong, few setose; article 3 nearly trvice article 2 lengtl-r; article 5 slightly longerthan article 4, about 3 tirnes ar[icle 3 length. Flagellum with 20 short arl-icles.

Mandible (Figs. 5, 6) molar subquadrate , stout, with brozrd grinding surface ;

setal rolr' of 7 setae. Right mandible (Fig. 5) rvith incisor process l-raving 4

strong cusps, Iacinia mobilis thin, delicate with 3 sn"rall teeth. l,eft mandible(Fig. 6) having incisor process with 3 strong cl-ritinizcd cllsps; lacinia n-robilis

rvith 3 strong teeth sirnilar to ir-rcisor.

Maxilla I (Fig. 7) lateral lobe cnned, rn'ith some setae otì olrtcr margin, 10

stout elongatc spines distally; shortest medial lobe having 2 elor-rgate plumosesetae.

Maxilla 2 (Fig. B) inner lobe witl'r 18 setae on inner and distal margir-rs;

mesial lobe rvith 3 serrate se tae; ollte r lobe with B lor-rgest distal se tae, few shortsetae on oul-er mar¡çin.

Maxilliped (Fig.9). Basis as long as palp articles l-3 togetl-re¡ distal marginand basal surface sctose; palpar articles setose, zu-ticlc 3longest, about 1/3longer than article 4, 6 times longer tl-ran alticle 5; epipod bare, ahnost trian-gula¡ reaching palpal article 3.

Pereopod I (Fig. l0) subchelate, shorter and stouter than follor'r'ing pereo-pods. Basis nearly twice length of ischium, tufi of elongate se tae on distal cor-ner; ischiurn, merus and carpus slightl;, decreasing in length, first tu,o arl-icles

rvit-h posterior rnargins fiinged rvitl"r elongate and short setae, ischium nearly2.5 times longer than carpus; propodr.rs about trvice length of dactylus, posteri-or margin with row of short spatulate setae, \/entral surface bearir-rg area ofelongate ancl short sct-ae densely placed; dzrctylus neally 4 tirnes longer thar-t

rvide, rvith strong constriction uear base of mzrrgius, about 4 times length ofcurved unguis, bare.

Pereopods II to IV simila¡ slightly ir-rcreasing in lengtl-r (Figs. 11, 12, 13).

Basis as long as carplls, anterior and posterior margins nitlt stout spines; mer-us 1/3 longer than ischium, half length of carpus, all three articles havinganterior margins with stout spines, posterior rnargins with elongate fìlteringsetae; propodus with 1-2 dorso-basal spines, posterior margin densely setose;

dactylus of PII to PIII with very long unguis; pereopod [V having unguis aboutas long as dactylus.

Pereopods V to VII stolrter and longer- than precederìl- PereoPods (Figs. 14,

15, 16). Basis nearlysame length as ischiurn and merus together-, auteriot-mar-

ANTARCTIC VAT,\/IFìJIìAN ISOPODS l5

16 A. N,I. S. PIRIìS & P. Y. G. SUN,IIDA

Figs. 10-t6. Dolicltisctt.s fen'azi nerv species, parat)¡pe , zrclult male, 29 nrm long; 10, pereopocl I; 11,

pereopocl II; 12, pcreopocl III; 13, pelcopocl IV; 14, pereopo.l y; 15, pcrcopocl \¡II; 16, apex ofpeleopocl \4L

-{16

14

ANTARCTIC VAL\4F'EIìAN ISOPODS

20

Figs. ì7-22. Dolich.iscusfertttzi, new species, paratype, aclulr male, 29 r-r-rrn long; 17, pleopod 1; 18,pleopod 1 apex of exopocl in clorsal i'ierv; 19, pleopod 1 a¡rex of exopocl in ventral vien'; 20, pìeo-

pocl 2;21, ruopocl; 22,apex ol'uropocl.

gin with some tl-ìin small setae; ischium as long as ûìerlrs, with l-3 small spineson posterior nìargill; carpus and propodLls bearing row of thin spines alongposterior margins, some spines spread ollt on ventral sllrface of carpus; propo-dus nearly same length as carplls $¡ith fe\,v setae orì antet-ior margin; unguisabout 1/8 length of dactylus u,ith accessory sera basally.

Pleopocl 1 (Figs. I7,I8,19 ). Sympod slightly smaller than endopod, ourerlateral margin with rorv of 5 spines, inner margin rvith many elorìgate couplinghooks basally. Endopod of same length as exopod, row of elongate plumosesetae along margins. Exopod indurate, with transr¡erse groove along its distal3/4, forn'¡it-¡g a tube ventrally; short groove at inner basal third .

Pleopod 2 (Fig 20). Sympod with many setae distalll, at inner lareral margin.Endo and exopod similar in length, rnargins fringed u,ith plumose setae;appendix rnasculina reaching distal margin of endopod.

Uropocl (Figs. 21, 22 ) elongate, 5.5 times longer than lvide, smooth. Sym-pod about 24 times longer than endopod, outer margin rvith row of short plu-mose setae on distal third; enclopod bearing two short setae distall¡ exopodrvith three setae .

t7

AJIllþ,il

21

v,-{Ø'', /"V

22

1B

DistribuLiotz. Bransfielcl Str¿rit: northeast of Elephant ancl .|oinville islancls, andsouthrvest of Smith Island.

Etyntology. The species is named after the Brazilian Antarctic Station, Coman-dante Ferraz.

Habitctt. Tl-re species 'r.r,as fottnd betu,een 168 ancl 362 m depth in a thermalrarrge frorn -2.07 to 1.28'C.

Thxor¿o'tnic cliscttssion. Dol'ichiscu,s ferrazi can be clistinguished from other species

of the genus by having the unique combinatiou of: head excavatecl midclorsal-ly on anterior 3/4,2 rouncled tubercles on postcrior quarter; pereonites I-IIIrather fen,expanded laterall¡ no coxal plates r,isible in dorsal view, bocly r'lith arow of small tubercles along posterior margins of all pereonites, pleonite 1 zrnd

fusecl pleonite 3, coxal plates ancl pereopods poorly spinulate . The species is

most sinrilar to Dolichiscus mhabiles Brandt, 1990 in having the body straight,body and pereopods r,vith small spines, tuberculated, and a row of spines onposterior margins of pereonites. Holever, Dolicltiscus fetrazi. is ezrsily separatedfrom D. ntirabilis by its larger size, less spiny bocl1,, coxzrl plates u'ith a dorso-pos-terior conspicuous spine, antenna 2 with a ror,r, of 24 instead of B paired aes-

thetascs, pereopods V-\rII longer and with basis and ischium smooth, ttropoclssmooth having lateral olrter [ìargin n'ith ferver and shorter plumose setae , andpleon rounded.

Ur-rfortunately pleopods I ancl 2 coulcl not be compared betrveen these tlvospecies, because D. ntirabilis is knou'r-r only by the clescribed female.

D olichis ctts b rctn,cltc¿e sp.n. (Figs. 23-46)

NIatet'ial exatnitzed. Ant¿rrctica, northeast of l(ng George Is., St. 4465 (61"44'Srr7"52'W),310 m depth,23.01.1984, R/V "Prof. W. Besnard" coll (holotyperrrale , MZSP 12176); iclem (2 paratypes male, IOUSP 233) .

Desu'ilttion. Holotype male, 29 mm long (Figs. 23, 24). Body covered by smallspines. Pereonite I fused to head, cepl'ralothorax less than half pleon length.Cephalothorax dorsal surface with several elevations: first three bilobed,decreasing in size backrvards; last tr'r,o wide, semicircular. Pereonites I-III rvithsmall rounded supracoxal spines. Pereonites II and III subcqual in length, per-eonite fV longest, pereonite V slightly longer than shortest pereonites VI andVII. Pleonites 1-2 fusion dorsally indicated by a groove; pleonite 3 indicated bylateral suture. Telson laterally protruclecl at base, lateral rnzrrgins parallel, apexacuminate , dorso sub-apical surface ending in apical spine.

Antenna I (Figs. 25,26). Pedttncular article I abottt 2.5 tirnes longer thanarticle 3, dorsal surface r,r'ith fèrv large spines, lateral margin fringed rvith min-Lrte setae; article 2 slightly longer than article 3, both articles r'l'ith fe'lv sparse

short setae. Flagellum Ir,ith 2 articles, frrst short, ringJike; terminal article elon-

A. M. S. PIRES & P. Y G. SUN4IDA

ANTARCTIC VALVIFERAN ISOPODS

\'i

19

Figs. 23-33. Dolichiscus brandtae, new species. 23-24, holotype adult male, 29 mm long; 25-33, para-type adultmale,30 mm long.23, dorsal view;24,lateralview; 25, antenna 1; 26, antenna I, detailof paired aesthetascs; 2T,antenna 2;28, rightmandible; 29, leftmandible; 30, maxilla l; 31, max-

illa2;32, maxilliped; 33, pereopod I.

o

32

20

gate, nearly [wice as long as first- peduncular article, having lateral rorv of 1B

twin aesthetascs.Antenna 2 (Fig. 27) dorsal surface densely covered lr,ith spines. First 3

peduncular articles short, bare, Iast 2 articles very long, fetv setose; article 3

nearly trvice article 2 length; article 5 slightly longer than article 4, about 2.5times article 3 length. Flagellum of 30 elorrgate articles.

Mandible (Figs. 28, 29) incisor process nith 4 strong chitinized cusps; molarbroad, stout. Right n-randible (Fig. 28) with lacinia mobilis thin, bearing tr'r'o

teeth, setal Lolr, of 4 setae . Left mandible (Fig. 29) with lacinia mobilis strong,three-toothed, setal ror,r'r.r,ith 6 setae.

Maxilla 1 (Fig. 30) lateral lobe curved, r,r,ith some setae on distal outer mar-gin, 10 stout elongate spines distally; shortesl- medial lobe having 3 clistal elon-gate plumose setae, many short setae laterally.

Nlaxilla 2 (Fig. 31) inner lobe rvith lB setae on inner and distal margins;mesial lobe rvith 3 serrate setae; ollter lobe rvith B longest distal setae, fe'rv shortsetae on outer margin.

Maxilliped (Fig. 32). Basis as loug as palp articles 1-3 together, distal marginand basal snrface rvith elongate setae; palpar articles clensely setose, articles 3

and 4 longest, about 1/3 longer than article 4, 3 times longer than article 5;

epipod bare, almost triangula¡ reaching palpar article 2.

Pereopod I (Fig. 33) subchelate, small scales scattered on clorsal surface.Basis nearly trvice length of ischium, tlrft of fe\,v elongate setae on distal corner;ischium,merus and carplrs decreasing in length, ischium nearly 2.5 times long-er than carplrs, all articles r,vith posterior margins fringed rvith elongate setae;

propodus about i.6 length of dactylus, posterior margin r'r,ith rorv of short spat-trlate setae, clactylus with strong constriction near base of unguis, nearly 3.4

times longer than r'r,ide, about 4.5 times lengtl'r of curved ungltis, antero-distalmargin with many elongate setae.

Pereopods II to IV simila¡ increasing in length fiom II to IV, dorsal surfacedensely coverecl u,ith small scales, posterior margins densely fringed r,r,ith pairsof elongaie plus shortsetae (Figs. 34,35,36,37 ). Basis shorter than carpus inpereopods II to III, both articles equal in length on pereopod fV; carpus andischiurn decreasing in lengtl-r proportionall¡ from pereopod iI to M varyingby factor on 4.4 in pereopod II to factor of 2.6 in pereopod IV; dactyhrs v'ithone ve ry long unguis, plus 2-3 short apical setae.

Pereopods \¡ to VII sirnila¡ longer than prececlent pereopods, dorsal surfäcecovered bysmall scales (F-igs. 38, 39 ). PereopodVbasis nearly I.2 times longerthan ischium and merlìs together; merus as long as carplrs, posterior clistalmargin rvith 2 spines; carpLrs and propodus bearing rolv of acute spines alongposterior margins; propodus about 1.3 times longer than carpus; unguis about1,26 length of dactylus nith small accessory seta basally.

Pleopod 1 (Figs. 40,41,42 ). Sympod as long as enclopod, outer lateral mar-gin rvith rolr, of elongate setae. Endopod of same lengtl-r as exopod, rorv of

A. N4. S. PIRES & P. Y. G. SUN4IDA

ANTARCTIC VALVIFERAN ISOPODS 21

Figs. 34-46. Dolithi.scus hrrnttlkrc, neu' species, paratype adult male, 29 mrn long. 34, pereopod II;35, pereopocl III; 36, apex of pereopod III; 37, pereopod IV; 38, pereopocl V; 39, pereopod MI;40, pleopocl 1;41, pleopod 1, apex ofexopod in dorsal view;42, pleopod l, apex ofexopod inventral view; 43, pleopod 2; 44, pleopod 2, appendix masculina; 45, uropod; 46 apex ofuropod.

.N 41

22 A. }4. S. PIRES & P. Y. G. SUN,IIDA

elongate plllmose setae alona- margins. Exopocl tl'ith transve rse riclge endin¡1 inlateroclistal lobe .

Pleopocl 2 (Figs. 43, 44). Slnnpod r'i,ith many setae distally irt inner lateralmargin. Endopocl slightll, longer than exopocl, mareins frir-rged r,vith ekrngateplumose se tae; appenclix rnasculina extremely uarror'r, distalll,, apex slightll, sur-passing clistal margin of endopocl.

lJropod (Figs. 45, 46) about 3.8 times longer th¿rn'tt'icle, syrnpod about 13

times longer than endopod, olrter margin r'r,ith rot,r, of elongate plumose se tae

distally; enclopod fringecl r.r,ith rot'r, of thin short setae; exopod having threetuuequalll, sizcd sctae.

Dist'ribution,. Atlantic Antarctic Ocean: northeast of I(ng Ge orge Islarrcl.

Etlwtolog¡,. The species is named after Angelika Brandt, tvho studiecl the Antarc-tic valviferans recently.

I-IabiLa,t. The species rvas l'our-rcl at 3I0 m depth.

Thxonomic cliscussion. Dolicltiscu,s brcnzd,ta.e and Dolicltiscu.s fÞt"tazi, together r'r,ith D.

nzerirlionalis (I-Ioclgson), D. þfelferi Richardson ancl l). ln"oJunclus Schultz, belongto a grollp of species rvith smootl-r bod;', r,r'ithout spines on the dorsal. D. bra,ncL

tae ca:n be disting^uished from the other species of the genr-ls by: cephalotl-roraxu'ith 3 pairs of dorsal lobes clecre asing in size posterior:ly, first 3 pereouites pluspleotelsou slightly expandecl laterall;,, telson t,r'ith aPex acttminate .

D olichis cus nt,et idiona,I is (Hodgson, 1910) (Figs 47-5I)

This species is characterizedby both a smooth bocly surface ancl the lacking ofsupracoxal plates. Schultz (1982) reclescribed the species on basis of abundantmaterial ancl comparecl it u'itl-r the more sirnilar species, D. ln"ot'tutdtLs ancl D.

þfeffu"i. Brandt (1990) reportecl 29 specimens of 11. mericlior¿ctlis in the SouthAtlauctic area ol'the Antarctic Ocezrn, and also stressecl the main morphologi-cal clifferenccs be Lr,r,een D. nteñclir¡nctli.s zrncl the closest D. þroftn'tdus.

In spite of the abundar-rt rna[erial, clescriptions ancl lì¡;^ures of male ple opods1 and 2, and of the operculurn are lacking. Eig^ht specin-rens r,r'ere exarninedfrom the Brazilian expeditions, six ntales, tu,o fèrnales, front a clepth rangc of20 to 362 rn. Descriptions zrncl figures of the mentioned appe nclices, are givenhere.

Male, 51.6 rnm long. Pleopocl 1 (Figs. +7,48) syrnpocl elongate, inner lateralrnargin r,r,ith ror'r, of elongate setae. Endopod of same length as exopocl, rotv ofelongatc plurnose setae along rtralgius. Exol-locl latelo-distall), excavatecl tvithtrans\¡erse ridge ending in lzrtero-clistal lobe. .Apex of lobe (Þ-ig. 48) u,ith min-ute fer.r, setae ventrall),.

Pleopod 2 (Fig. 49). Sympocl lvith sonìe setae distalll, at inner lateral margin.Endopocl slightll, longer thar-r exopocl, margins fringecl'r'r,ith elor-rgate plumose

ANTARCTIC VAL\IIFERAN ISO PODS

.,MFigs.47-51. Dolicltßcusmeridionalß,adultmale,Sl.6mmlong.4T,pleopodl;48,pleopodl,apex

of exopod in ventral view; 49, pleopod 2; 50, uropod; 51, apex of uropod.

setae, appendix masculina narrower distally, apex shorter than distal margin ofendopod.

Uropod (Figs. 50, 51) about 3.8 times longer than wide, sympod about 19

times longer than endopod, outer margin with row of elongate plumose setae

distally; endopod with two short setae: one apical, other lateral; exopod havingthree setae, two of them shorter.

D oli chis cus mirabilis Brandt, 1990

Two females of this species were found off the northeastern part of KingGeorge Island, at 310 m depth. The species was described based on onefemale and is characterized by body covered with many scales and tubercles,telson acuminate. Males are unknown.

Antarcturus Zur Strassen, 1902

The genus Antarcturus was recently studied by Brandt (1990) who split it into

23

24 Ä. tr{. S. PTRIÌS & P. Y (}. SI]N,IIDA

Tal¡le 2. Occurrence of the vah'ifer-an species in the sarnpling statiolìs.

S¡recies Station

'I )oliclr iscr rs I rlrrrtrltlc sp.r r.

Dolichiscus ferr"azi sp.n.Dolicl-riscus meliclionalis (I{oclgson, 1I10)Dolichiscus rnirabilis Blanclt, 1990

Alltarctlrms hernpeli \,\¡ägele, 1 9BB

Antarctuì'us hodgsoni Richarclsorr, 1 I I 3Arìtal'cturì.rs horriclus serratlrs Br"ar-rclt, 1 990Aìlt¿u'cturus nonzrl"oi sp.n.Antarcturus schirniclti llranclt, I 990Antarctulus spinacoronatus Schultz, 1 978Antal'ctlu"Lls strasseni Branclt, I 990Chaetalctnlus longispilosus Blandt, 19!10

Litarctunrs gr¿rnulosus (Norclenstan'r, 1933)Litarctums zuìtzìì'cticus (BoLrvier, 1 9 1 0)

À,Iixalctulus abnomris (I(Lrssakin, I967)Neoar-cturus minutus Blanclt, 1990

G\ptor-rotus ¿ììlt.zrrcticrìs Eiehts, 1 853

Pseuclicìothea scutata (Stephensen, 1947)

44654381, 486i, 4862,48724465, Fer"r'az, 4861, 4863, 4871, Snol'I.4,tr65

4381, Ferlaz, 4866, 4867, 4871,4872,4873,487 4, 487 5, 5052, Snol' L446ó446ó, 4872, 4873, 4874, 48754381

4861, 4864, 4872, Snorv I.4465, 4862, 486348ôB

4465, 50364863,4871, 4812,5027F er r ¿t2., 47 43, 4860, 4865,,1866, 4867, 4Biì8,487 0, 487 1, 487 4, 4B7 i¡, Snr¡v I.4863,48744872, r::027

438I, 47 43, 4864, 486ir, 4868, 48?0,487 1, 487 2,4873,487+,,1875, 5030, 5053, 5054, 50ô2, Ferraz,Srorv I.48ô1, 4Bô2, 4863, 5036

fir'e genera: Arttat"ctttttts, Oxltctt'¿¡711"ut, CltcteLc¿trturus, Litcnch.tttr;and 7\tbero,l'clui"1ts.

From 29 species reported as AiLtca-ctui"¿¿s for the Atlanctic area of the Ar-rtarcticOcean (including slrbantarctic places) (\Arägele 1988, Branclt 1990) 1B species\\¡ere transferred to the ne.g' genera.

Six species of Antcuctur"¿J occlrrrecl in Bransfield Strait plus A. nono,Loi ne\N

species (see Table 2). These ne\,\¡ occr-lrrences enlarge the depth ancl geo-graphical clistribution of tlÌe species.

Antú1 ctLt,ì'LLS lLo tLa,t0i sp.n. (Figs. 52-73)

NIcr\etia,l ex,o,ntined. Antarctica, northeast of Joinville Is., St. 4381 (62'48'S54"20'W),280 m clepth, 18.01.1983, R,/V "Prof. \4¡. Besnard" coll (holotypemale, NIZSP 12177 one fenÌale, IOUSP 234).

Desuiþliotz. Ilolotype rr.rale, 31 mm long (Figs. 52, 53). Bocly co\¡crcd b)'minutespines. Heacl lisecl to pereonite l, sllture visible dorsally, cephalothorax nearlyl/3 pleon length; entire supraocular spines ne\¡er surpassing eyes, fòllor,ed by4 pairs of shorter spines, each pair oll posterior part of heacl, ¿rnterior and pos-terior part of pereonite I, posterior third of pereonite II. Pereonites II to [Vsrlbequal in length, r,r,ith 2 pairs of conspiclrolls coxal spines anteroJateralll'.Pereor-rites \¡ to \4I decreasing in length, with minute spines. Pleonites 1-3

ANTARCTIC VAL\'IFERAN ISOPODS 25

Figs. 52-61. AnLarclutus nonaLoi, new species. 52-53, holotype adult male, 31 mm long; 5461, para-

type adult female, 33 mm long. 52, dorsal view; 53, lateral view; 54, antenna 1;55, antenna 2; 56,

right mandible; 57, left mandible; 58, maxilla l; 59, maxilla 2; 60, maxilliped; 61, pereopod I.

55

26

fusecl to pleotelson, shallor'i grooves indicating dist¿rl limits of fusion. Pleotel-son serrate laterall¡ apex rouncl, zr pair of stout cauclal spines latero-distally.

Antenna I (Fig. 54). Peduncular article I about 1.5 times longer than article2, article 2 slightly longer than article 3, some fe¿rtherlike setac laterally. Fla-

gellurn frrst article short, ringlike; second terminal article elongate, nearly 1.4

timcs longcr tltan flrst pcduncnlar article, with lateral ror'r, of 12 paired aesthe-tascs plus apical group of single aesthetasc and 5 simple setae.

Antenna 2 (Fig. 55). Peclur-rclc with b articles. Article 3 nearly 2.4 times arti-cle 2 length, both articles rvith outer margins spiny, inner tnarsins havingmany elongate setae; article 4 about 2.5 times louger than precedent article,margins setose; article 5 slender rvith minute setae, broken in all ex¿rminedspecimens. Number of flagellar articles unknor,vn.

Mandible (Figs. 56, 57) molar stout shor,ving broad grinding sttrface, setalrorv with three setae. Right mandible (Fig. 56) having incisor of 3 strong chiti-nized teeth, thin lacinia mobilis of 3 tee th; left mandible (Þ'ig. 57) lr,ith incisorof 4 teetl-r, lacinia mobilis strong, three-toothecl.

Maxilla I (Fig. 58) curved in'lvards, lateral lobe covered with thin elongatesetae, 10 stollt elongate spines distally; shortest medial lobe with inner marginsetose, apex bearing 3 long plumose setae.

Maxilla 2 (Fig. 59) inner lobe with 10 plumose setae on clistal rrargin, innermargin rvith a tuft of Iìne setae medially; mesial lobe lvith 4 serrate setae, innermargin setose; outer lobe rvith 4 distal setae , oLrter two longest.

Nlaxilliped (Fig'. 60). Basis as long as palp articles 1-2 together, inner rnarginsetose; Palpar articles setose on medioventral surface and medial malgitr. setaeincreasing in length distally; article 3 longest, slightly longer than articles 1-2

togethe¡ 2.7 tirnes longer than article 5. Endite bearing rorv of short spinelikesetae distally. trpipod bare, almost triangular, reaching palpal article 3.

Pereopod I (Fig.61) subchelate, shorter and stolrter than following pereo-pods. Basis nearly twice length of ischium, tuft of elongzrte setae on distal cor-ner, lateral rnargins bearing miuute setae; ischium, ûrerlls and carpus slightlydecreasing in length, all articles with posterior margins and medior,entral sur-face fringed rvith elongate setae; propodus almost twice lengtl'r of dactylus, pos-

terior margin clensely covered by row of very elongate setae , anterior marginrvith many setae on distal half, ventral surface bearing rorv of elougate setae

medially; dactylus, nearly 3 times longer than lvide, about 4 times iength ofcurved unguis, margins se tose.

Pereopods II to IV similar, slightly increasing in length (Figs. 6i, 63, 64).Basis with tuft of elongate setae on postero-distal margins, many short slolrtspines on dorsal surface; ischium to propoclus: posterior margins bearingdense ror'r, of long filter spines, longest at carplls and propodus, anterior mar-gins felr, setose bearing strong anterodistal spine.

Pereopods V to VII shorter and stouter thau precedent pereopocls (Figs. 65,

66, 67, 68). Basis longest article, r,entral surface r,i,ith many short stolìt spines,

A. N4. S. PIRES & P. Y G. SUNIID¿\

ANTARCTIC VALVIFERAN ISOPODS 27

Figs.62-69. Antarctutusnonaloi, newspecies.62-68, paratype adultfemale,33 mm long; 69, holo-

cype adult male, 31 mm long. 62, pereopod II; 63, pereopod III; 64, pereopod [V; 65, pereopodV; 66, apex of pereopod V; 67, pereopod VII; 68, apex of pereopod VII; 69, pleopod 2.

Àod À o¿

28

posterior margin rl'ith fer'r,setae; merus and carptts sttbequal in length; ischiumto propodus: posterior margins fiinged r'r,ith ror,v of short slender spines, ante-rior rnargins having somc elongate setae; dactylus altnost sarne length as pro-poch-rs lr'ith accessory seta clistally.

Pleopocls 1 ancl 2 sexually dimorphic. Pleopocls 3 to 5 similar in both sexes.

Nlale pleopod 1 (Fig. 70,71.) sympod nearly as long as cndopod, olltcr margindentate, 'rvith ror,v of 8 dissimilar teeth. Endopocl longer than exopocl, rolv ofelongate ph-rmose setae along margius. Exopod rvith transverse ridge forminga tube, encling in latero-distzrl protruding lobe, apex globose. Female pleopodI sympod nearly half endopod length, olrter margir-r lr,ith B teeth; endo anclexopod subequal ir-r length, mzrrgins fiinged rvith long plumose setae. Malepleopocl 2 (Fig. 69) sympocl rvith fèrv short setae at inner distal corne¡ endo-pod nearly 1/10 longer than exopod, clense row of elongate plumose setae

along rnargins; appendix mascttlina abruptly narrolvirtg at distal qltarter, apexsurpassing distal margin of endopod.

Uropod (Figs. 72, 73) coverecl r,ith short ancl stout spines. Basal ramr-rs

about 2l times longer tl-ran distal ramlls, outer margin u,ith ro'u,of sl'rort plu-mose setae on clistal half; endopod acute bearing tr,vo short setae apica.ll;',setose area latero-basally; exopod longer than half length of endopod, withthree small setae distally.

Dis tribution. Bransfìeld Strai t: northezrst of Joinville Island.

Eryntolog¡. The species is nauecl afier Dr. Edrnundo F. Nonato, coordinator ofbentl"ric studies for the Brazilian Antarctic Program.

Habitat. The spe cies rvas founcl at 280 m depth.

Rentallrc. Fernales presented slightly larger size and longer body spines thanmales.

Thxor¿omic cliscussiotz. Besides splitting Antarctu'rus into 5 genera Branclt (1990)diviclecl the remaining species into three groups. F{orvever, some species donot fìt t-hese groups be cause of interme diate and,/or nerv characters. This diffi-crrlty indicates the need of a revision of Antu,tctunts.

The three groups of species estzrblishecl by l3ranclt (1990) for the largegenus Anta'rctu,ttts nere basecl mainly on the patteln of dorsal spines. Antarctut'tts noncúoi sp.n. does not exactly fit into any group of species mentioned byBrandt (1990).It shares the pattern, but not the size, of the spines and eleva-

tions on cephalotl-ror¿rxlr,ith the "oryx group" of species. A. not"¿cttoi sp. n. is eas-

ily separated from Llne "lndgsorzi group" by having supracoxal spines olì pel'eo-nites 1-4 and the pair of latero-distal telsonic spines rnuch smaller. These latterspines are also stou[, shorter and larger basally than in the other species of thegrolrp. Finall1,, the nelv species is clistinguished from the "horriclzrs group" byhaving supraocular and caudal spines not branched, and pereopods 2 to 4much rnore setose.

A. N,I. S. PIRES & P. Y G. SUN,IIDA

ANTARCTIC VALVIFERAN ISOPODS

Figs.70-73. Anlarclurusnonaloi, nervspecies, holotype adr-rltrnale,31 mm lor-rg.70, pleopod 1;71,pleopod l, apex ol'exopod in ventral view;72, uropod; 73,apex ofuropod.

Antarcturus nonatoi sp.n. resembles Antarcturus horridus serr&tus Brandt, 1990

in general outline and size of the dorsal spines placed along the body. Howev-er, it differs from A. horridus serratus by supraocular and caudal spines notbranched, pereopods 2 to 4 densely setose, dorsal spines on pereonites I to IIIlonger and stouter, higher number of pairs of aesthetascs on antenna 1,

peduncular articles 2-3 of antenna 2 with spines varying in size and spread outon outer margins, and shorter maxillipedal palpar article 3, and apical area ofmale pleopod 1.

Antarcturus hemþeli Wägele, 19BB

Together with Litarcturus antarcticøs (Bouvier, 1910) this species was very com-mon in the Bransfield Strait area. It occurred from 66 to 280 m depth. Thirtyeight specimens were found, 17 males, 2l females.

Antarcturus hodgsoni Richardson, 1913

This species was redescribed by Brandt (1990) and is firstly recognized by bodycovered with long spines, bearing elongate setae. The specimens examined(three individuals) were from 310 m depth, which is within the known rangeof the species (130-449 m).

Antarcturus horridus serratus Brandt, 1990 (Figs. 74-76)

The species was described based on one female, 16 mm long. In the present

oÅ

9q

q!

|,\u(/ "VVìiur, jtv

72

30 A. N,I. S. PIIìES & P. Y. G. SUN4IDA

['igs. ?4-79. A¡z/a¡-clt¿t'tts l¿o¡t'idt¿.s set)ahLS, aclttlt m¿rle, 17.3 mrn long-. 74, pleopocl I;75, pleo¡rocl 1,

apex of exopocl in clolsal vien,; 76, pleopocl 2.Figs.77-79, Clutekn'cLt¿t'L¿s lon.g'isþin.ostt,s, aclult tuale,

18.5 n-u-n 1ong. 77, pleopocl 1; 78, pleopocl 1, apex of cxopocl in ventr-¿rl vie rv; 79, pleopocl 2.

study six specimens lverc obtairìccl (sirtglc male, firre fcmales) varying betneen15 and 18 rnm. They were found betrveen 66 and 310 m clepth. The descrip-

tion ancl figures of pleopods 1 and 2 from tl-re 17. 3 mm long male are given

here.Pleopod 1 (Figs. 7+,75) sympocl 2/3 as long zrs enclopocl, ottter rnargin clen-

tate, u,ith row of B clissimilar teeth. Endopod as long as exopocl, row of elon-

1i'

il

illñrifì

,lliJ¡

\7g

7B

gate plumose setae along margins. Exopod with transverse ridge lorming a

tube, ending in latero-distal protruding lobe ; terminal part of the tube round-ed by tiny short setae.

Pleopod 2 (Fig. 76) sympod with few short setae at inner distal corner; endo-pod nearly as long as exopod, dense row of elongate plumose setae along mar-gins; appendix masculina slowly narrowing clistalwarcls, apex surpassing distalmargin of endopod.

Remarhs. The number of spines at the distal margin of pereopod I sympodseems to vary within the species. Brandt (1990) reported six spines in the spe-

cimen of 16 mm, whereas in the present study we found individuals with six oreight spines.

ANTARCTIC VALVIFERAN ISOPODS

Five individ,",, *".JJJ:;',':; o':,:"":':;ïï ;:i 80 to 362 m deprhThe species, known by a single male, was previously found at the South Shet-land Islands at 200-300 m depth.

Antarcturus sþinacoronatus Schultz, 1978

Thirteten specimens were found in the Elephant Island region, seven malesand six females, at a depth range of 180-310 m. A. sþinacoronatus is a bathyalspecies and had been found between 191 and 745 n depth (Wägele 1987).

Although it is a frequent species in Weddell Sea (Wägele 1987) , A. sþinaco-

ronatus has not been found elsewhere until the present record.

Ant arctur us slras s eni Brar-rdt, 1990

Only eight specimens of this species were fottnd, at 96 m depth offshore Palm-er coast. It was previously known from Weddell Sea, living in deeper water(201-871 m) (Brandt, 1990).

31

C h a e t arc turzs Brandt, 1990

Chaetarcturus longispinosus Brandt, 1990 (Figs. 77-79)

Few specimens (3 males, 4 females) occurred in King George Island between310 and 460 m clepth, in the vicinities of the type locality (South ShetlandIslands, 449 rn depth) (Brandt, 1990). As only females were known, and maleswere found in the present material, we present the descriptions and figures ofmale pleopods I and 2 .

Male, 18.5 mm long. Pleopod 1 (Figs. 77,78) translucent, not indurate, sym-

pod nearly 2/3 as long as endopod, inner margin with row of setae. Endopodas long as exopod, row of elongate plumose setae along margins. Exopod withtransverse ridge forming a tttbe, ending in latero-distal protruding lobe; termi-

32

nal part of the tube elonsate follorvecl by thin setae only seen in vs¡f¡¿l lzis$,

(Fig. 78).Pleopod 2 (l-ig 79) sympod r.r,ith fer'r, short setae at inner clist¿rl corner, orìe

plurnose seta at opposite sicle; enclopocl nearly as long as exopod, clense rort'ofelong-ate plumose setae along margins; appenclix masculina narrorving clistal-

r'r,ards, zÌpex sLrrpassing clistal margin of ertdopocl.

Li t arc tln'us Branclt, 1990

L i I ct t' c t t¿'r tt s g- r ct, n u I os zi s (Norclenstarn, I 933 )

This species \,\¡as recorded from Antarctic aucl sub¿rnt¿ìrctic $¡aters in a clepthrange of 160-500 m. II tvas collcctecl in several places nithin Bransfielcl Strait,from 125 to 264 m clepth.

Litct.t'ctu.rt¿s ct,tt tct rcticzls (Bouvie¡ 1910)

This is a very corlìmon species in the Bransfielcl Strait area. It rvas speciallyabunclant at station 4865, uorth of Joinville Islar-rcl, r'r4rere 38 individualsoccurrecl.

A total of 63 indiviclnals rl,¿rs fonnd (32 males, 31 lèrnales) fron 20 to 412 mdepth, cleeper than previous recorcls (15-150 m depth) (\,Vägele 1988).

NIix u rc t.urz¿s Brandt, 1990

Nlixctrcttnus presently has fi,1'o species, M. altnonni.s (I(ussakin, 1967) and M.cligrtcrt'us (Nordenstan, 1933), both f'ormerly placed in NIiu'outr:tu'nts. -fhe

genlrs presents rnorphological characteristics of Chc¿elc¿rctttttts ancl Neocn'cttutts,

ancl is recognizecl by cepl'rzrlothorax lr,ith srnall sttpraocular spiues; supracoxalspines, if present, short, blunt; clactylus of pereopods 2 to 4 lt'ith trlo short dis-

tal clalvs.

NI i x ct r c t u, r rt s ct l¡ n o r ntz s (Iftrssakin, I 967)

Only trvo rnale specimens \\¡ere founcl, betneen 135 and 180 m depth at botl"r

eastern and I'r,estern part of Bransfìeld Strait. This is the fìrst record of the spe-

cies after its description, and brings the distribution far south (63'25'5,62'19'W) and to shallor,r'er $¡aters. The typelocality of NI. ctlnzottnis is east ofArgentina, "somer,rdrat south of 40'S," at a depth range of 400-500 m (I(rssakin1e67).

N e o c¿rcttu"t¿s Barnard, 19I4

Neo ct,rcturt¿s ntitz'ttttts Brandt, 1990

One male ancl one female of N. ntitzt¿t?¿s were obtained in Aclmiralty 8a1,, I(ingGeorge Island, ancl off Smith lsland, rl,est of Bransfield Strait, fì-om 125 to 168

m depth.

A. ìVf . S. PIRES & P. Y G. SUN,IIDA

Family Chaetiliidae , G11þtott.olzs Eigl-rts, 1853

Clyþ ton,otus anlorclic'us Eights, 1853

Tl"ris species is by far the most fre quent ancl abturdant Vah,ifèra from the "PRO-ANTAR" sarnples. It- rvas present in ztlmost half of thc sarnplcs containing iso-

pocls. lJ. a,n,l,a,rcl,i,cu.s is rviclcspreacl llrrorrgl'r tìe Bransfield Strait length, and B2

inclivicltrals were collected fiom 20 to 41.2 m depth.

Farnily Pseudidotheiclae, Ps e ucliclotlt¿u¿¿ Ohlin, 1901

P.s e u rJ i rJ o L h e r¿ s c u t u, l, ct, (Stepl-rer-rsen, I9 47 )

Several ir-rdividuals rvcre collected near Elcpl-rar-rt Island, between 180 and 460m depth. In previous ì-eports the species was four-rcl at 600 m depth (Stephen-ser-r 1947), and as deep zrs 342 m (Sl'reppard 1957). I2 scu,ta,tct,r'vas recently rede-scr-ibed by Brzrr-rdt & Wzig^ele (1990). It is knorvn only fiom South She tland areaoff Elephar-rt Islancl.

REFERENCE,S

lJcclclarcl, E. ìì, lUB6. lìcport on the Isopoda collcctr--cl by Il. M. (lhallcnqcl cltrrirrg tl're years l873-Itì7(ì, part 2. - Ohalìengel Re p. Zool. l7 (48): Ì-1711.

Branrlt,,A., 1990. Ant¿u'ctic Valvilclans ((ìrr-rst.rccir, Isopocla. Vtlvilcla). Nerv gcttct-a. n<'tv sltccies

zrncl rcclcscri¡rtiolrs. - E..f. Blill, Lciclcn. 176 pp.Br'¿urclt, A. &.J. \ /. \,Vzigclc, 1988. An,lot:l.tuvs btntittttt rì.sp.2ì rìe\\¡\'\/ecldcÌl Sca isopocl of the farnily

Arctrrlicl¿re (lsopocl:r: \¡alvilcla). - Polar Biol. 8 (iì): 4ll-419.IJrarclt, A. &.1. \\/. Wligele, 1990. Reclcscliption of .Psr:rzdid.t¡l,lten çtulr¿tn (Stephenset'r, 1947) (Isopo-

clzr, Valvil'cla) zrncl aclirptat-ions to a uricroplrag^or-rs nutrition. - CLustace¿tna 58 (l): 97-105.flals, P., 1977. Dclivc contincrltalc ct speci¿ìtioll clu complcx Crtr¿tLoserolis no\/. gcn., crttstàccs

nntarct-iques bcnthiqrrcs corìììr.rs cle l'Arc cìe Ia Scotia aux iles I(et'guclcn. - (1. r. hebcl. Séanc.

¡\cacl. Sci., Paris 284: 2273-2276.l)czrlbolrr,.J. Il., 1967. Foocl ¿rncl repr-ocluctiou <tl' Ol1,þLon,ol.tts a.n.Latrlittl.s (Clustacea: Isopoda) at

N,IcÀ4trrckr Souncl, ¿\ntarctic¿r. -Tr¿u.ls. lloy. Soc. Nen, Ze¿rlancl, Zool.8 (15): 163-16U.

fleolge, lì.. Y. & I. Nc¡4ocscu, 19tÌl'r. Arrthuridean isopods ((ì'Lrstacea, Isopocla, Arrthuride:r) fi-otn

the strbant¿rlctic islalrls - Sor-rth Georgia, Elephant, Sotrth Olkncl, ancl Falklancl. - Tt'ar,. Mus.I Iist. nat. "Gligoilc Antipzr" 27: 7L)-47 .

I(ussakin, O. Cl., 1967. Isopocla ¿rncl ?Ln¿rirlacc¿r I'rorn the co¿rst¿rl zoucs of the Ant¿Lrctic and Sub-

¿urt2rrctic.-/rzBiologiczrlResul(sof tìre SovietAnt¿u'ctit:Expcdition (1955-5tì),3,-Issled.Fau-n)/ Morei 4 (12):220-289.

Luxrnoore, R.4.,1982. Ecoìogiczrl zrncl bchaviour-al zrdirptations to thc Antarctic environrnent bythc isop<rcl S¿rolis þoli,kr. - In.f. Blar-rchzrr'd,.f. lvlair & I. N,Iorrison (ecls): Natural EnvironmentRese¿rrch Council, U.K., pp, I40-151.

N()nato, E. F., M. A. V. Pctti, P. C. Paiva & T. ¡\. S. Brito, 1992. Proglana Antártico Brasileiro:zurostlag-cnl cle organisuros bel'rtônicos rczrlizzrdzrs nls seis pr-irrcilzrs cxpedições (1982-1988),

corn zr particiltação do N,/Oc "Prof. !\/. Besnarcl". - Rclat. int. Inst. oceanogr. Ur-riv S P¿rtrlo

(32):1-12.Richar-dson, H. E., 1906. Iso¡rocìes (prenricìr-c rnórnoile ). - [,xpéditiou .Arìtâr'ctique Ft'arçaisc, Par--

is: 1-21.

ANTAIì(]TI(] VAI VIFI1IìAN ISOPODS 33

34

Richardson. H. E., 1913. Crustacés Isopocles. - Denxième Expédition Antarctique Françaisc (J-

Charcot), 1908-1910, Paris: 1-24.

Schultz, G. 4., 1978. Nonasellote isopocl clustaceans fì-om Anvers Island zrncl the otl'ìer Al'ìtarcticlocations. - Antarct. Res. ser. \4/ashington 28 (2/3): 2141.

Schr-rltz, G.,{., 1982. Arcturidae from the Antarctic ancl Southern Seas (Isopoda, Vah'ifera). Part1. Biol. Antarct. Seas X. - AntaÌct. Re s. ser. Washington 32: 63-94.

Shepparcl, E. M., 1957. Isopoda Cn¡stacea. Part II: The suborcler Valvifela. Families: Idotheiclae,Pseudiclotheidae and Xenarctuliclae färr. n. l\¡ith a supplement to Isopod Cmstacea, part L'Ihe fami\'Seroliclae. - Discovery Rep. 29: 141-198.

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A. M. S. PIRES & P. Y. G. SUMID¡\