Two new Andean species of Neocorynura (Hymenoptera: Halictidae: Augochlorini) with notes on their...
Transcript of Two new Andean species of Neocorynura (Hymenoptera: Halictidae: Augochlorini) with notes on their...
ORIGINAL ARTICLE
Two new Andean species of Neocorynura (Hymenoptera: Halictidae:Augochlorini) with notes on their biology
VICTOR H. GONZALEZ1, ALLAN H. SMITH-PARDO1 & GIOVANNI BOGOTA2
1Division of Entomology, Natural History Museum, University of Kansas, Lawrence, KS, USA, and 2Facultad del Medio
Ambiente y Recursos Naturales, Universidad Francisco Jose de Caldas, Bogota, Colombia
(Received 27 May 2005; Accepted 17 January 2005)
AbstractWe describe and illustrate the male, female, and pupa of two new species of Neocorynura from the Colombian Andes, andprovide information on their nesting behavior, host plants and social organization. Nests of Neocorynura iguaquensis sp. nov.Smith-Pardo & Gonzalez and N. muiscae sp. nov. Smith-Pardo & Gonzalez were found in flat or vertical banks, andcontained one to three adult females. The percentage of multi-female nests varied considerably from 8.3% to 40% of thetotal of dissected nests at different times in 2000 and 2003. The ovarian development, wing and mandibular wear of femalesin the nests with two or more females indicated that they were the offspring that remained in the nest before dispersal or amother and a newly emerged daughter. Pollen taken from the nest cells and scopae of museum specimens showed that bothspecies rely heavily on pollen of asteraceans and may be active year-round. Details on the nest architecture and commentson the phylogenetic placement of both species are also provided. Direct observations on the multi-female nests are requiredto determine whether or not such nests contain temporary assemblages or truly semisocial colonies.
ResumenDescribimos e ilustramos el macho, hembra y pupa de dos especies nuevas de Neocorynura de los Andes colombianos, yproporcionamos informacion sobre su biologıa de nidificacion, plantas hospederas y organizacion social. Los nidos deNeocorynura iguaquensis sp. nov. Smith-Pardo & Gonzalez y N. muiscae sp. nov. Smith-Pardo & Gonzalez fueronencontrados en el suelo, en areas planas o barrancos verticales, y tenıan de una a tres hembras adultas. El porcentaje denidos con mas de una hembra vario considerablemente desde 8.3% al 40% del total de nidos disectados a diferentes mesesen el ano 2000 y 2003. El desarrollo ovarico, desgaste de las alas y mandıbulas de las hembras en los nidos con dos o mashembras indicaron que ellas fueron las crıas que permanecieron en el nido antes de dispersarse o una madre con la hija reciennacida. El polen tomado de las celdas de crıa y escopas de especimenes de museo mostro que ambas especies dependenprincipalmente de asteraceas y que podrıan estar activas todo el ano. Tambien oferecemos detalles de la arquitectura delnidos y comentarios sobre la posicion filogenetica de ambas especies. Observaciones directas de los nido con mas de unahembra son necesarias para determinar si tales nidos son agrupaciones temporales o verdaderas colonias semisociales.
Keywords: Neocorynura, nesting biology, Andes, Colombia
Introduction
Neocorynura Schrottky is one of the larger genera of
the primarily Neotropical tribe Augochlorini
(Hymenoptera: Halictidae), containing more than
60 named (Engel, 2000) and perhaps an equal
number of undescribed species (Smith-Pardo,
2005a). Neocorynura ranges from Argentina to
Mexico, but is perhaps most diverse in northern
South America, where several species reach high
altitudes in the Andes. In fact, Neocorynura and
Caenohalictus (Halictidae, Halictini) are likely the
most diverse groups among those bee taxa occurring
in the higher Andes (Gonzalez & Engel, 2004).
Most species of Neocorynura nest in the ground
but some species nest in rotten wood (Engel, 2000).
The purpose of this paper is to describe two new
ground-nesting species of Neocorynura from the
Colombian Andes, and provide information on their
nesting biology, host plants, and social organization.
Neocorynura iguaquensis sp. nov and N. muiscae sp.
Correspondence: V. H. Gonzalez, Division of Entomology, Snow Hall, 1460 Jayhawk Blvd., University of Kansas, Lawrence, KS 66045, USA. Fax: . Fax: +1
(785) 864-5260. Email: [email protected]
Studies on Neotropical Fauna and Environment, December 2006; 41(3): 197–208
ISSN 0165-0521 print/ISSN 1744-5140 online # 2006 Taylor & Francis
DOI: 10.1080/01650520600630782
nov. appeared as Neocorynura sp. 1 and Neocorynura
sp. 2, respectively, in a paper regarding the
kleptoparasitic behavior of the phorid fly Megaselia
on the brood cells of both species (Gonzalez et al.,
2002).
Material and methods
Taxonomic descriptions
Morphological observations, measurements, and
illustrations were made using an ocular micrometer
on an Olympus SZ60 microscope. The abbreviations
F, S, T, OD and PD are used for flagellomere,
metasomal sternum and tergum, and ocellar dia-
meter and puncture diameter, respectively.
Morphological terminology follows that of
Michener (2000) and Harris (1979) for surface
sculpturing. Description format generally follows
that used for other augochlorine bees (e.g. Engel,
2000; Engel & Smith-Pardo, 2004). Mean values are
given with standard errors.
Type specimens and immature stages of the bees
and associated organisms are deposited in the
following institutions: AMNH American Museum
of Natural History, New York (J. G. Rozen); IAVH
Instituto Alexander von Humboldt, Villa de Leyva,
Boyaca, Colombia (J. E. Castillo); ICN Museo de
Historia Natural, Instituto de Ciencias Naturales,
Universidad Nacional de Colombia, Bogota,
Colombia (G. Amat); LABUN Laboratorio de
Investigaciones en Abejas, Universidad Nacional de
Colombia, Santa Fe de Bogota (G. Nates-Parra),
MEFLG Museo de Entomologıa Francisco Luis
Gallego, Universidad Nacional de Colombia, Sede
Medellın, Colombia (G. Morales), SEMC
Entomology Division, Natural History Museum,
University of Kansas, Lawrence, KS, 66045-7523,
USA (Z. Falin).
Nest excavations
Nests of Neocorynura iguaquensis sp. nov. and N.
muiscae sp. nov. were collected in the middle and
end of the wet season, 22–26 June and 16–20 July
2000, and 22–24 August 2003, at an altitude of
2850 m in the Eastern Andes of Colombia, at the
Santuario de Fauna y Flora de Iguaque National
Park (Carrizal) in the Department of Boyaca (5.70uN, 73.46u W). The site is located in the transition
between cloud forest and Paramo; in this area, the
dry season begins in September and extends until
the end of March when rains begin. There are on
average 84 mm of rainfall during the dry season. The
rainy season continues through August, with an
average of 209 mm of rainfall during this season, the
annual average being 294 mm. The median annual
temperature is 12uC (IGAC, 1996).
A total of 68 nests of Neocorynura iguaquensis sp.
nov. and 31 of N. muiscae sp. nov. were excavated
(Table I) during cold, cloudy weather when the bees
should have been in their nests. Cell clusters were
carefully transferred to the laboratory, cells were
opened with forceps and their contents examined
under a stereomicroscope. Adults and immatures
were fixed in Kahle’s solution (Triplehorn &
Johnson, 2005) for later dissection and examination,
and pollen was transferred to a plastic tray for later
identification. Cells contents and female’s ovarian
development were only examined in the samples
collected in 2000. The ovarian development was
examined in females collected from nests that had
more than one female and is provided according to
the types defined by Michener and Wille (1961).
Finally, the presence of hydrophobic glandular
secretions on the inner wall of turrets, tunnels, and
cell cavities of the nests was tested under the
stereomicroscope by putting a drop of water on
the surface: if glandular secretions were present,
the water would not be immediately absorbed by
the substrate.
Most nest features were measured in the field
using dial calipers, except the diameter of cell
entrances and thickness of cell closures, which were
taken with an ocular micrometer on an Olympus
SZ60 microscope. Nest descriptions follow
Sakagami and Michener (1962).
Palynological analysis
Pollen samples from brood cells of Neocorynura
iguaquensis sp. nov. nests were treated and preserved
following Erdtman’s (1986) acetolysis method and
then mounted on glass slides. In order to estimate
the relative percentage of pollen of each plant
species, we randomly selected one slide among
several slides that had been prepared for each cell.
Additionally, pollen from the bodies of four
Table I. Number of nests (percentage in parenthesis) of
Neocorynura iguaquensis sp. nov. and N. muiscae sp. nov. collected
in 2000 and 2003 at Iguaque National Park (Colombia) contain-
ing one, two and three adult females.
Number of nests (% in parentheses)
N. iguaquensis sp. nov. 1 R 2 RR 3 RR Total
June 2000 9 (75) 3 (25) 0 12
July 2000 11 (91.7) 0 1 (8.3) 12
August 2003 27 (61.3) 12 (27.3) 5 (11.4) 44
N. muiscae sp. nov.
June 2000 7 (77.8) 2 (22.2) 0 9
July 2000 11 (91.7) 1 (8.3) 0 12
August 2003 6 (60) 4 (40) 0 10
198 V. H. Gonzalez et al.
museum specimens (females) of N. muiscae sp. nov.
collected on 4 January 1992 from the same locality
was examined. Bees were placed in individual vials
with 95% ethanol, and then gently shaken for about
5 min to remove the pollen from their bodies. The
ethanol was discharged and the pollen treated as
explained above.
Pollen grains were identified and counted by
sampling all grains found in a row until 1000 grains
were reached. Pollen identification was done using
the following palynological atlases for the Paramo
vegetation of the Colombian Eastern Andes:
Velasquez and Rangel (1995), Bogota et al.
(1996), Velasquez (1999) and Bogota (2002).
Examination of pollen was at 40X and 100X
magnification with a Leitz DIALUX 22 EB micro-
scope. Pollen samples are deposited in the
Palynological collection of the Instituto de Ciencias
Naturales, Universidad Nacional de Colombia,
Bogota. Mean values are given with standard errors.
Results
Systematics
Neocorynura iguaquensis Smith-Pardo &
Gonzalez, new species (Figure 1)
Diagnosis
Males and females of N. iguaquensis sp. nov. can be
easily recognized by the distinctive color pattern,
with the head and mesosoma mainly black, con-
trasting with the legs, sterna and T1 and T2 largely
orange; remainder of terga mainly dark brown to
black. This species can be distinguished from other
species with similar body color such as N. papallac-
tensis Engel by the sulcate gena and postgena, and
the base of propodeum metallic green, basally
sulcate and distally imbricate. In N. papallactensis,
the gena is strongly imbricate to rugose, and the
basal area of the propodeum is microareolate to
rugose, mainly dull green with weak coppery
reflections.
Description
Female. Total body length, 9.7 mm (¡0.64, 8–11,
n517); forewing length 8.1 mm (¡0.3, 7.3–8.4,
n518). Head wider than long. Scape longer than
combined lengths of F1–F6; F10 longer than
preceding flagellomeres; F2 subequal in length to
F1. Clypeus with upper margin above lower tangent
of compound eyes, paraocular lobe obtuse (,110u).Mesoscutum slightly wider than long; metanotum
more than half length of mesoscutellum. Meso-
tibial spur serrate, more than half length of
mesobasitarsus; inner metatibial spur with five
teeth, the most distal almost completely fused with
spur apex (fifth); 1m-cu confluent with 1rs-m;
2m-cu basad 2rs-m by approximately five times
vein width; first submarginal cell as long as
combined lengths of second and third submarginal
cells; second submarginal cell with anterior margin
slightly longer than anterior margin of third marginal
cell; hamuli spaced 3-1-1-1-1-1. Basal area of
propodeum about as long as mesoscutellum.
Metasoma elongate, semi-petiolate.
Mandible with strong acetabular groove. Labrum
with weak sulcus and small, more or less narrow
central process (orbiculate elevation of medial
region). Clypeus, supraclypeal and lower paraocular
areas dull, minutely but strongly imbricate, punctu-
res sparser (2 PD) and larger on clypeus, denser on
lower paraocular areas; frons, remainder of face and
vertex strongly punctate; gena and postgena strongly
imbricate and striate. Scape imbricate with fine
punctures irregularly separated. Pronotum and
propleuron imbricate. Mesoscutum dull, densely
punctured (( PD); punctures sparser on slightly
shining medio-anterior area, integument between
punctures imbricate; mesoscutellum and metano-
tum dull, strongly punctate. Metanotum faintly
imbricate, punctures separated by 1–2 PD. Pleura
strongly imbricate, largely dull, punctures on pro-
pleuron coarser than on mesoscutum. Tegula faintly
imbricate. Basal two-thirds of propodeum striate,
apical one-third imbricate but shining.
Figure 1. Male terminalia of Neocorynura iguaquensis sp.
nov. A5sixth sternum, B5fused seventh and eighth sterna, C and
D5genital capsule, ventral (left half) and dorsal (right half), and
in lateral views, respectively.
Two new Andean Neocorynura 199
Head and mesosoma mainly black, except as
follows: apex of mandible and labrum light brown;
basal half of clypeus, supraclypeal and paraocular
areas, gena, pronotum, lateral and posterior margins
of mesoscutum, all margins of mesoscutellum,
metanotum, and base of propodeum weakly metallic
green, with coppery reflections; lateroposterior area
of propodeum mainly with coppery highlights. Legs
orange. T1 and T2 mainly orange, apical margins
dark brown; T3–T5 mainly dark brown to blackish;
T2–T5 with basal margins feebly metallic green or
coppery. Sterna mainly orange, distal sterna dark
brown. Wing veins and pterostigma dusky brown.
Face with erect and mostly simple setae, longer
and denser on paraocular areas. Area along inner
margin of compound eye, above antennal sockets
and vertex with sparse brown setae. Gena densely
covered with highly branched pale yellow setae;
longer, thinner and sparser on postgena.
Mesoscutum, mesoscutellum and metanotum den-
sely covered with erect, short brown setae, more
densely covering the metanotum. Pronotum, prono-
tal lobe, subalar area, pre-episternum, mesoscutum
and mesoscutellum with long, erect and simple or
minutely branched black or brown setae, longest and
sparser on mesoscutellum; lateral and dorsal ridges
of pronotum, surrounding areas of pronotal lobe and
subalar area densely covered with whitish tomen-
tum. Ventral area of mesepisternum, lateral poster-
ior surfaces of propodeum, and sides of metanotum
with dense, long, branched orange setae, shorter on
the posterior surface of propodeum, projecting from
an appressed and dense whitish pubescence.
Pubescence of legs mainly orange. T1 with dense,
long (1–1.5 OD) branched yellowish setae on basal
half, shorter on sides, distal half almost bare. T2–T6
with two types of setae: dense, appressed, short
blackish or dark brown setae, longer on T5–T6; long
pale yellowish setae, denser and longer on sides of
terga and mostly absent dorsally, such setae darker,
longer and denser on terminal terga. Basal zones of
T2–5 with yellowish tomentum forming distinct
basal bands. Sterna with long orange scopal setae.
Male. As described for the female, except for usual
sexual characters, and as follows: Body length
13 mm (¡0.60, 12.5–14.0, n54); forewing length
10 mm (¡0.45, 9.1–11.3, n54). Head about as
wide as long. F1 shorter than F2. Paraocular lobe
more obtuse. Mesoscutum slightly wider than long;
inner metatibial spur serrate, one third length of
metabasitarsus, rather slender and slightly curved.
Hamuli with a spacing pattern 4-1-4. Metasoma
slightly more elongate than in female; S6, S7+S8,
and genital capsule as in Figure 1.
Clypeus metallic green, with copper-red high-
lights; upper frons and vertex black with blue-green
highlights. Scape dark brown with strong green
reflections on outer surface. Metepisternum black,
with weak blue-green reflections. Legs black (green-
ish reflections on front and hind coxae) with the
following parts orange: tarsi, apices of tibiae, base of
hind tibiae, apex of hind femur. T1 with dark brown
spots on base and apical margin, T2 with apical third
dark brown. T4–T6 with green reflections. S1–S3
orange, remainder of sterna dark brown.
Pubescence yellowish, longer and denser than
female. Scape densely covered with branched setae
(about twice as long as scape diameter). Gena and
postgena densely covered with highly branched
orange setae; longest on postgena. Dorsal and lateral
ridge of pronotum, pronotal lobe, mesoscutum,
mesoscutellum, and metanotum densely covered
with long, erect, branched brown setae; longest on
mesoscutellum. Mesepisternum, and lateral and
posterior surfaces of propodeum with long,
branched, erect orange setae. T1 and basal half of
T2 densely covered with long, branched, semi-erect
orange setae; apical half of T2 and remaining terga
with shorter, sparser, semierect setae. Basal bands of
pale tomentum weak on T1 and T3, otherwise
absent. Sterna densely covered with small,
appressed, orange setae.
Type material
Holotype. R, Colombia. Boyaca, Santuario de Flora
y Fauna de Iguaque, 5.70u N, 73.46u W, 2850 m, 19
July 2000. V. H. Gonzalez [SEMC]. Paratypes. 12Rwith same data as the holotype but collected on 18
July, 23–25 June 2000 [AMNH, IAVH, ICN,
LABUN, MEFLG, SEMC,]; 1R, idem, 1
November 1987, C. Sarmiento, M. Guevara
[LABUN]; 1R, idem, La Laguna, 9 January 1989
[LABUN]; 1R, idem, Morronegro, 15 January 1991.
H. Alonso [SEMC]; 1R, 2„, idem, Francos, 3000 m,
5 January 1992. A. Amarillo [AMNH, LABUN];
1„, idem, C. Sarmiento [ICN]. Cundinamarca, 1R,
La Calera, Vereda Buenos Aires, 5 May 1991,
2880 m. C. Sarmiento [MEFLG]; 1„, San Antonio
de Tena, PNN. Chicaque, 9 June 1993, 2150 m,
C. Sarmiento [LABUN].
Etymology
The specific epithet refers to the type locality, the
National Park Santuario de Fauna y Flora de
Iguaque, Colombia.
Variation
Variation noted in the following characters: vein 1m-
cu basad or confluent with 1rs-m; length of anterior
margin of third submarginal cell as long as or longer
200 V. H. Gonzalez et al.
than anterior margin of second submarginal cell;
coloration of trochanter, femur and basitarsus of
forelegs, and T1 and T2 ranging from orange
to largely dark brown. One female paratype
from Iguaque has both forewings with only two
submarginal cells.
Pupa. Pupae of both sexes (n57 of each sex) agree
closely with pupal description of Augochlora
nominata Michener (Eickwort & Eickwort, 1972),
except for presence of small rounded tubercles on
base and apex of outer surface of scape, all coxae
with long rounded spines, fore and mid-femora
with rounded protuberances, S6 of female with
rounded apical tubercle. Number and arrangement
of tubercles on metasomal terga as follows: no
tubercles on T1; T2–T5 with pointed tubercles
progressively increasing in size toward the end of
metasoma, except T5 in female and T7 in male,
with shortest tubercles; 6–9 tubercles per side on
T2; 6–10 on T3; 7–9 on T4; the most lateral
tubercle on each side of T3 and T4 longest; 5–7 on
T5; 2–4 on T6 and 2–3 on T7 in male. On all terga,
tubercle series broken by median gap. Hind tibia of
female with apical tubercle virtually absent.
Metasomal S4 of male without long spines. Caudal
extremity of both sexes without doorknob-shaped
protuberance.
Neocorynura muiscae Smith-Pardo & Gonzalez,
new species (Figure 2)
Diagnosis
Males and females of N. muiscae sp. nov. can be
recognized by the combination of the following
characters: head and mesosoma metallic green,
metasoma largely dull green, with weak orange to
coppery highlights (looks darker with little or no
green reflections at lower magnifications); base of
propodeum sulcate, integument otherwise imbricate,
and T1 imbricate, with sparser punctures on basal
half than distal half. Neocorynura muiscae sp. nov.
belongs to the same group as N. papallactensis
(Ecuador) and N. iguaquensis sp. nov., differing from
these species, in addition to the characters mentioned
above, by the strongly sulcate gena, and the presence
of basal bands of appressed setae on T2–T5.
Description
Female. In general as described for N. iguaquensis sp.
nov. except: total body length, 9.1 mm (¡0.45, 8.9–
10.2, n 510); forewing length 7.5 mm (¡0.2, 7.2–
7.7, n 510). Head slightly wider than long. Scape
longer than combined lengths of F1–F5; F2 slightly
longer than F1. Clypeus wider than long, ocular angle
(lateral angle formed by epistomal sulcus) obtuse.
Inner metatibial spur pectinate, with four teeth (not
including apex), the most distal separated from spur
apex; second submarginal cell rectangular; anterior
margin of second submarginal cell as long as anterior
margin of third marginal cell; hamuli spaced 4:1:3.
Head and mesosoma metallic green, except for
mandible (apex reddish), labrum, apical third of
clypeus, antenna, upper paraocular area, along inner
margin of compound eye, tegula, legs and sterna
dark brown to black; face, pronotum and midanter-
ior area of mesoscutum with weak coppery reflec-
tions, mesopleura with blue reflections. Metasoma
largely dull green, with weak orange to coppery
highlights, especially on basal half of T1 and T5.
Wings slightly dark, darker along costal margin;
veins brown, pterostigma honey colored.
Mandible with few simple, long setae (0.5–2.5
OD). Labrum mostly bare with stiff, brown, simple
setae along lower margin. Clypeus with brown,
simple setae (1 OD) along apical margin, sides with
branched, denser and shorter setae (0.5–1 OD).
Supraclypeal and subantennal areas with very sparse
and short (%OD) branched setae; sparser on latter.
Paraocular area and frons with longer and denser
setae. Scape with stiff, dark brown and poorly
branched setae (( 1.5 OD), longest on basal third.
Vertex with stiff, minutely branched, dark brown
setae (0.5–1 OD) in length; postgena with sparse,
Figure 2. Male terminalia of Neocorynura muiscae sp. nov.
A5sixth sternum, B5fused seventh and eighth sterna, C and
D5genital capsule, ventral (left half) and dorsal (right half), and
in lateral views, respectively.
Two new Andean Neocorynura 201
branched, light brown setae (1–2.5 OD). Pronotum
and propleuron with minute, light brown setae,
stiffer and lighter in color on posterior margin of
pronotal lobe. Mesoscutum covered with stiff,
minutely branched light brown setae (0.5–2 OD).
Mesoscutellum mostly covered with sparse, minute
(1–2), dark brown setae. Metanotum as mesoscu-
tellum but with shorter (0.5–1.5 OD) and lighter
setae. Base of propodeum nearly bare, sides with
branched, minute to 1 OD, light brown setae.
Mesepisternum with mostly minute and scattered
light brown setae, denser towards venter, remainder
areas covered with minute, light brown setae mixed
with some scattered dark setae; metepisternum with
light brown setae, minutely branched and uniformly
abundant. Procoxa with branched light brown setae
(1.5–2.0 OD); protrochanter with scattered, poorly
branched setae brown; profemur with inner side
mostly bare, outer side covered with stiff, branched,
brown setae, posterior margin with longer and
darker setae (1–1.5 OD); protibia covered with
dense, minute, light brown setae, inner surface more
densely cover with longer setae (%1.5 OD); tarsi as
protibia, but with longer setae on outer margins;
mesocoxa mostly bare, a few thick, simple, light
brown setae (2–2.5 OD) near articulation with
mesotrochanter; mesotrochanter with stiff, branched
yellow setae (1–1.5 OD), sparser on inner margin;
mesofemur with most of outer side covered with
minute, light brown setae, inner side mostly bare, a
dense patch of longer setae on posterior margin;
mesotibia covered with minute, simple setae (%OD),
uniformly distributed, inner side with row of longer
and simple setae; metatrochanter and metacoxae
covered with light brown and branched setae, 1–1.5
OD in length; metafemur with light brown setae
(2–4 OD), each seta with 2–4 branches on apex,
shorter on posterior margin; metatibia covered with
stiff, mostly simple, light brown setae (%OD),
margins with longer setae (1–1.5 OD), 5–6 branches
on apex on each setae. T1 with basal half with sparse,
light brown branched setae (1–1.5 OD); T2–T4 with
basal band of minute white, branched setae, minute
brown setae on remainder of tergum; setae longer
(1–1.5 OD) on T3 and T4; T5 with basal band of
white minute setae, remainder of T5 densely covered
with stiff, branched brown setae (,2.5 OD) in length,
the longer on posterior margins.
Male. As described for female except as follows
(n54): total body length 9 mm (¡0.44, 8.2–9.1);
forewing length 7.4 mm (¡0.3, 7.0–7.8). Mandible
slender and pointed, without preapical teeth, outer
surface without grooves, lower margin slightly
carinate, upper margin continuous. Labrum
smooth and shiny, without tubercle. Paraocular
lobe more angular than female. Inner metatibial
spur slender and weakly curved, one fourth of
metabasitarsus length. Hamuli spaced 3-1-3.
Metasoma slightly more elongate in appearance;
S6, S7+S8, and genital capsule as in Figure 2.
Subantennal and lower paraocular areas, and
metanotum strongly punctured. Clypeus metallic
green. Legs dark brown with green reflections. Terga
with bases metallic green, especially on T1 and T5,
remainder brown, with yellowish reflections.
Mandible with sparser, simple yellowish setae
(1.5–2.5 OD). Postgena with sparse, branched setae
(2–3 OD). Mesoscutum and mesoscutellum covered
with light brown setae, darker, sparser and longer
on latter. Legs in general less pubescent than in
female; profemur and protibia with some dark
brown (0.5–1 OD) setae along posterior margins,
much sparser on latter; metafemur covered with
shorter setae (minute-1 OD), especially on outer
side. Metasomal pubescence as in the female, except
setae lighter in color, denser on T1; sterna with
sparser pubescence than in female.
Type material
Holotype. R, Colombia: Boyaca, Santuario de Flora
y Fauna de Iguaque, 5.70u N, 73.46u W, 2850 m, 20
July 2000. V. H. Gonzalez [SEMC]. Paratypes. 7Rand 3 „ with the same data of the holotype but
collected on 19 and 25 June 2000 [AMNH, ICN,
MEFLG, SEMC]; 1R, idem, 4 January 1992, A.
Tamayo; 1R, 2„, idem, C. Sarmiento [LABUN,
SEMC].
Etymology
The specific epithet honors the Muiscas, an indi-
genous Colombian nation that formerly inhabited
the high plains in the Central Andes, between the
departments of Boyaca and Cundinamarca.
Variation
The coloration of clypeus, mesoscutellum, and T2–
T4 ranges from dull to metallic green with or
without orange highlights in the female.
Pupa (n5three males and four females). As
described for N. iguaquensis sp. nov. except for the
presence of larger tubercles, particularly those on the
head and mesoscutellum; number of tubercles on
metasomal terga as follows: T2 with 5–7 tubercles
per side; 7–9 on T3; 6–8 on T4; 3–5 on T5; 2–4 on
T6; and 1–2 on T7 of male.
Comments
Pupae of N. iguaquensis sp. nov. and N. muiscae sp.
nov. differ from that of N. colombiana (Eickwort,
202 V. H. Gonzalez et al.
1979) by the absence of long spines on S4 of male
and the presence of tubercles on eye summit, base of
outer surface of scape, inner surfaces of scape and
pedicel in both sexes, and rounded apical tubercle
on S6 of female. However, the strongest similarity to
N. colombiana is the caudal extremities in both sexes,
which lack a doorknob-shaped protuberance, sup-
porting its absence as characteristic of the genus
Neocorynura.
Nest architecture
The nests of N. iguaquensis sp. nov. were usually
found scattered in nearly vertical banks (20–40 cm
high) along ditches and trails, and in grazed pastures
around the visitor’s center at Iguaque National Park.
The banks with nests face east and were sparsely
covered with mosses. The soil in flat ground and
banks was loose, black, wet to very wet clay.
Nests of N. iguaquensis sp. nov. were shallow
(Table II), and consisted of a short main burrow
ending in a single chamber containing only one
earthen cell cluster supported by pillars and rootlets.
The nest entrance was round and constricted, and
lacked an earthen turret; a nearly circular tumulus
was usually deposited outside the entrance. The
main burrow widened gradually in diameter toward
the bottom of the nest and entered the cell cavity
commonly above the cell cluster. The general
direction of the main burrow was variable, being
horizontally inclined upward or downward in those
nests located in the banks, to almost vertical for
those nests in flat ground. Two of the nests
excavated in 2000 had a single blind burrow
extending beyond the nearly spheroid cell cavity.
The inner wall of the main burrow and cell cavity
was smooth, presumably not lined with hydrophobic
secreted material. The cell cluster was separated
from the wall of the cell cavity and was supported by
1–5 earthen pillars; cell clusters in the pasture were
frequently tightly supported by rootlets in addition
to pillars. Cell clusters were rough on the outside
and cells were generally not externally discernible.
As in most halictine bees, cells were slightly flattened
on the bottom surface with a rounded oval upper
surface; their inner walls were smooth and lined with
a yellowish waterproof substance. Most cells were
vertical with their bases slightly diverging within the
cluster, although some were nearly horizontal; cell
closures were loose and concave on the inner face.
Complete pollen masses were nearly spherical but
were flattened on the bottom (,5 mm in diameter
and 3 mm high), and were placed on the flatter side
of the cell at the end opposite the entrance.
Nesting structures of Neocorynura muiscae sp. nov.
were as described for N. iguaquensis sp. nov. except
that the entrance usually had an earthen turret
projecting above the ground surface and was
surrounded by an elliptical tumulus. The surfaces
of the turrets were rough externally and smooth
internally but not polished. As in N. iguaquensis sp.
nov., there was no evidence of hydrophobic gland-
ular secretions lining the inner walls of turret, tunnel
and cell cavity. The general direction of the main
burrow was usually vertical in flat ground and it
entered the cell cavity at the top; however, the main
burrow sloped horizontally downward or upward in
those nests found in vertical banks. A single blind
burrow per cell cavity was present in 21% of the
nests excavated in 2000. The cell cavity was rather
ovoid in longitudinal section, and because the
majority of the nests were found in the pasture, cells
clusters were usually supported by rootlets, but also
had up to six pillars.
Contents of the nests
Based on our limited collection, the percentage of
nests of N. iguaquensis sp. nov. and N. muiscae sp.
nov. containing more than one adult female varied
considerably from 8.3% to 40% of the total of
dissected nests at different months (Table I).
Females in those multiple female nests had about
the same head width and differed in the degree of
wing and mandibular wear and ovarian development
as indicated in Table III.
Pooled across all nests of N. iguaquensis sp. nov.
collected in 2000, 10% of the cells contained eggs,
50% had larvae, 30% pupae, and 7.% had une-
merged adults (n540 sealed cells). A single adult
male was found in three of the nests excavated in
2000 and in one of the nests excavated in 2003.
Similarly, pooled across all nests of N. muiscae sp.
nov. excavated in 2000, 78% of cells had larvae,
19% had pupae, and 3% had unemerged adults
(n532 sealed cells). A single adult male was found in
three of the 31 nests excavated in both years.
Adult females were frequently seen flying over the
grazing area and some of them were excavating the
soil, presumably starting new nests. Before excava-
tions no females were seen either guarding nest
entrances or exhibiting any kind of aggressive
behavior during the excavations; instead they ran
away and hid at the bottom of the cell cavity.
Host plants
Pollen grains from 32 plant species belonging to 18
families were found within Neocorynura iguaquensis
sp. nov. cells (Table IV). The family Asteraceae
was represented in the pollen samples with the
highest number of species. The spectrum of pollen
types varied among cells and each cell had on
average identifiable pollen from 9.2 plant species
Two new Andean Neocorynura 203
Table II. Measurements (mm) of some structures of nests of Neocorynura iguaquensis sp. nov. and N. muiscae sp. nov. collected in 2000 at
Iguaque National Park (Colombia). Means are given with standard error followed by the range and sample size in parenthesis. N/A5no
applicable; *5tumulus of N. muiscae sp. nov. was elliptical, thus we provide a maximum and minimum diameter.
Nest structure N. iguaquensis sp. nov. N. muiscae sp. nov.
Maximum nest depth 80.6¡0.6 (64.6–110.9, n515) 87.3¡0.5 (75–113.0, n513)
Turret Absent Present
Height N/A 17.7¡1.0 (8.1–38, n56)
Inner diameter N/A 4.1¡0.03 (3.3–5.0, n510)
Outer diameter N/A 9.3¡0.08 (8.0–10.6, n57)
Tumulus diameter * 44.5¡0.1 (41.7–50.5, n58) max. 34.2¡0.9; min 29.3¡1.0 (n53)
Nest entrance (diameter) 3.7¡0.4 (3.3–4.8, n511) N/A
Main burrow (diameter)
Below entrance 4.3¡0.4 (n54) 4.0¡0.04 (n56)
Midpoint 4.2¡0.4 (n510) 4.4¡0.06 (n57)
At entrance of cell cavity 7.3¡1.1 (n514) 6.2¡0.06 (n510)
Main burrow length 46.8¡8.8 (36.0–69.6, n513) 50.6¡0.8 (22.0–68.0, n510)
Blind burrows
Length 16.3–20 (n52) 14.8¡0.1 (6.8–26.1, n55)
Diameter 4.6–7.8 (n52) 6.3¡0.07 (4.7–7.0, n58)
Cell cavity dimensions
Width 27.8¡6.1 (18.1–35.0, n512) 23.4¡0.2 (18.0–26.4, n58)
Length 26.4¡5.5 (22.0–36.5, n515) 24.7¡0.2 (16.0–32.7, n513)
Height 28.5¡4.5 (22.6–36.5, n516) 28.1¡0.2 (22.5–37.5, n513)
Space between cavity & cell cluster 5.3¡0.6 (4.7–6.2, n58) 4.7¡0.1 (n54)
Pillars
Diameter 3.1¡0.9 (2.3–4.0, n53) 5.8–7.1 (n52)
Length 4.3¡1.0 (3.0–5.4, n56) 3.8¡1.2 (2.8–5.5, n54)
Number of cells per cluster 4.1¡1.9 (2–9, n517) 2,9¡0.4 (1–6, n517)
Cell cluster dimensions
Width 14.3¡0.4 (14.0–24.3, n57) 17.7¡0.6 (14.0–24.0, n54)
Length 20.9¡3.4 (13.0–23.8, n57) 20.8¡0.5 (17.0–26.4, n54)
Height 16.0¡1.8 (14.2–18.2, n57) 16.4¡0.4 (11.8–18.7, n54)
Thickness of outer walls 1.3¡0.5 (0.8–2.2, n510) 1.3¡0.3 (0.9–2.1, n58)
Thickness of wall between cells 1.9¡0.8 (1.0–3.2, n57) 1.8¡0.5 (1.0–3.5, n510)
Cell dimensions
Length 12.7¡0.5 (12.1–13.8, n510) 12.3¡0.2 (11.7–13.3, n513)
Max. diameter 6.0¡0.4 (5.4–6.4, n512) 5.6¡0.3 (4.9–6.4, n512)
Diameter at neck 3.7¡0.2 (3.4–3.9, n55) 3.4¡0.2 (3.3–3.5, n53)
Cell entrance (diameter) 3.0¡0.1 (2.8–3.2, n522) 3.0¡0.1 (2.7–3.2, n511)
Cell closure thickness 1.7¡0.2 (1.6–2.1, n55) 1.6¡0.2 (1.4–2.0, n55)
Table III. Cell contents, mandibular and wing wear, and ovarian condition of females in multiple female nests of Neocorynura iguaquensis
sp. nov. and N. muiscae sp. nov. collected in 2000 at Iguaque National Park (Colombia). Developed and undeveloped ovaries were similar
to those ovary types A or B, and type E, of Michener and Wille (1961), respectively.
No.
females
Open
cells
Closed
cells Eggs Larvae Pupae
Callow
adults Wings Mandibles Ovaries
N. iguaquensis sp. nov.
A 2 0 3 0 2 0 1 Unworn,
Worn
Unworn,
Worn
Developed
Developed
B 2 2 7 2 3 2 0 Unworn,
Worn
Unworn,
Worn
Developed
Developed
C 2 2 4 0 4 0 0 Unworn,
Unworn
Unworn,
Unworn
Undeveloped
Developed
D 3 3 2 1 1 0 0 Unworn,
Unworn,
Unworn
Unworn,
Worn,
Unworn
Undeveloped,
Developed,
Developed
N. muiscae sp. nov.
A 2 0 3 0 3 0 0 Unworn,
Unworn
Unworn,
Unworn
Developed,
Developed
B 2 0 3 0 0 3 0 Unworn,
Unworn
Unworn,
Unworn
Developed,
Undeveloped
C 2 0 3 0 0 3 0 Unworn,
Unworn
Unworn,
Unworn
Developed,
Undeveloped
204 V. H. Gonzalez et al.
(¡0.5, 5–13). Although Viburnum sp.
(Caprifoliaceae) was present in all samples and
accounted for 42.5% of the total sampled pollen, it
was not always the dominant plant species in all
cells. Ageratina type, Gnaphalium-Lourteigia type,
Hypochaeris radicata, Loricaria complanata, Smilax
sp. and Espeletia type were present in percentages
above 1% and all together (including Viburnum sp.)
constituted more than 50% of the pollen found in
the sampled cells.
Similarly, pollen from 23 plant species of 14
families was identified from the museum specimens
of Neocorynura muiscae sp. nov. Almost all of the
species were also found in N. iguaquensis sp. nov.
Table IV. Spectrum of plant species and pollen types recorded in pollen samples (n515 brood cells) from nine nests of Neocorynura
iguaquensis sp. nov. collected in the middle of the wet season (June and July 2000) in Iguaque National Park (Colombia). Proportion (%)
per cell is given with standard error and range in parentheses.
Plant species Overall proportion (%) Proportion per cell (%) Number of cells
Apiaceae
Hydrocotyle sp. 0.02 0.3 1
Araliaceae
Oreopanax mutisianum (H.B.K.) Decne. & Planch. 0.04 0.3 1
Asteraceae
Asteraceae type 0.01 0.2 1
Ageratina type 16.1 20.1¡4.6 (0.06–45.3) 14
Espeletia type 1.3 1.4¡3.3 (0.2–9.7) 7
Bidens type 0.9 1.2¡3.9 (1.4–7) 4
Gnaphalium-Lourteigia type 13.8 14.3¡3.5 (0.5–39) 14
Hypochaeris radicata L. 9.2 7¡2.5 (0.1–19.4) 8
Loricaria complanata Wedd. 8.0 9.6¡3.4 (1.1–42.5) 12
Munnozia sp. 0.1 2.5 1
Betulaceae
Alnus sp. 0.4 2.6¡1.7 2
Caprifoliaceae
Viburnum sp. 42.5 46.5¡5 (11.9–78) 15
Chloranthaceae
Hedyosmun sp. 0.06 0.6¡0.1 2
Cunoniaceae
Weinmannia sp. 0.4 1.9¡1.3 (0.2–5.9) 4
Loranthaceae
Gaidendron sp. 0.02 0.1¡0.01 2
Melastomataceae
Bucquetia glutinosa DC. 0.3 0.8¡0.2 (0.2–1.3) 5
Miconia type 0.8 0.8¡0.1 (0.1–1.9) 14
Myrsinaceae
Myrsine coriacea (Sw.) R. Br. 0.01 0.1 1
Myrtaceae
Myrtaceae type 0.01 0.1 1
Poaceae
Poaceae type 0.2 0.9¡0.7 (0.1–2.3) 3
Polygonaceae
Rumex acetosella L. 0.01 0.1 1
Rosaceae
Rubus bogotensis Kunth 0.09 0.9¡0.3 2
Rubus robustus C. Presl. 0.1 1.1¡1.1 2
Rubiaceae
Arcytophyllum sp. 0.03 0.3 1
Borreria sp. 0.02 0.2¡0.1 2
Cinchona type 0.08 0.6¡0.2 (0.3–1) 3
Smilacaceae
Smilax sp. 4.9 6.5¡3.4 (0.06–29.2) 8
Solanaceae
Cestrum sp. 0.02 0.4 1
Solanum sp. 0.01 0.2 1
Valerianaceae
Valeriana pilosa Ruız & Pavon 0.02 0.3 1
Unknown
type 1 0.6 1.9¡1 2
type 2 0.06 0.8 1
Two new Andean Neocorynura 205
cells; however, about 80% of the pollen types is
present in trace amounts less than 1% and may be
contaminants or were gathered incidentally during
nectar visits (Table V). Gnaphalium-Lourteigia type
accounted for about 70% of the total pollen, and
ranged from 48% to 96% among bee specimens.
Discussion
Systematics
Neocorynura papallactensis, N. iguaquensis sp. nov.,
N. muiscae sp. nov. and at least one undescribed
species from lower elevations in Panama form part of
a well-supported clade of primarily high Andean
bees that occurs from Venezuela to Ecuador, and
which is closely related to a clade with species
ranging from central South America to central
Mexico (Smith-Pardo, 2005a). Most of the species
of the iguaquensis group have an unusual semi-obtuse
epistomal suture, very weak occipital carina, and
exhibit a distinctive color pattern that resembles the
polistine wasps Agelaia multipicta (Haliday)
(Hymenopera, Vespidae) (Smith-Pardo, 2005b), a
sympatric and very common social wasp in Iguaque
suggesting a possible mimicry complex around this
wasp species (Sarmiento, 1993).
Biology
The nesting biology of Neocorynura iguaquensis sp.
nov. and N. muiscae sp. nov. is similar to that
described for other ground-nesting species of the
genus (e.g., Michener et al., 1966; Michener, 1977),
consisting of shallow nests with a short main burrow
ending in a single chamber containing only one
earthen cell cluster, and usually occupied by a single
adult female.
Except for the nests A and B of N. iguaquensis sp.
nov., the unworn wings and mandibles of the
females in most of the multi-female nests
(Table III) suggest that individuals in most of these
nests were relatively young females of about the
same age; in addition, the ovarian development
shows that one and sometimes all of the females in a
nest were reproductively active. Assuming that the
females in those multi-female nests were related, our
observations suggest that they were likely sisters or as
in the case of the nests A and B of N. iguaquensis sp.
nov., a mother and a recently emerged daughter.
Therefore, the founder female in those nests
occupied by sisters may have died or left the nest.
It is likely that these multi-female nests are
temporary assemblages of offspring before one or
both of them disperses. Nonetheless, cell contents
indicate that at least one female was actively
provisioning. We have no data on the period that
newly emerged adults remain in their natal nests or
on whether or not females in such multiple female
nests were actively provisioning, mated (we did not
examine the spermatheca) and laying eggs.
However, anecdotal observations of a two-female
nest of N. iguaquensis sp. nov. suggest that both
individuals foraged for pollen (P. Montoya, pers.
comm.).
Neocorynura erinnys Schrottky, a lowland species,
has the highest reported number of adult females
(five) per nest recorded in the genus (Luderwaldt,
1911), and therefore it is usually referred to as a
semisocial species (Danforth & Eickwort, 1997;
Engel, 2000). However, the provisioning phase of
these females was never examined and nothing can
be said about the social behavior of this species.
Direct and detailed observations on these multi-
female nests in Neocorynura are thus required to
determine whether or not such nests contain
Table V. Spectrum of plant species and pollen types recorded in
pollen samples removed from the bodies of museum specimens of
Neocorynura muiscae (n54 females) collected in Iguaque on 4
January 1992.
Plant species Overall proportion (%)
Asteraceae
Ageratina type 21.3
Ambrosia type 0.5
Bidens type 0.2
Espeletia sp. 0.2
Jungia sp. 0.04
Loricaria complanata Wedd. 0.02
Gnaphalium-Lourteigia Type 72.4
Hypochaeris radicata L. 3
type 1 0.1
Caprifoliaceae
Viburnum sp. 0.3
Clusiaceae
Hypericum sp 1.3
Cunoniaceae
Weinmannia sp. 0.02
Cyperaceae
type 1 0.06
Fabaceae
Salvia sp. 0.02
Fagaceae
Quercus sp. 0.02
Melastomataceae
Bucquetia glutinosa DC. 0.4
Miconia type 0.02
Myrtaceae
Myrcianthes sp. 0.02
Poaceae
Poaceae type 0.02
Polygonaceae
Rumex acetosella L. 0.02
Rubiaceae
Arcytophyllum sp. 0.02
Scrophulariaceae
Castilleja sp. 0.02
Smilacaceae
Smilax sp. 0.02
206 V. H. Gonzalez et al.
temporary assemblages or are truly semisocial
colonies.
The palynological analysis of the brood provisions
of Neocorynura iguaquensis sp. nov. (Table IV)
indicated that this species collected almost exclu-
sively pollen from asteraceans and Viburnum sp.
(Caprifoliaceae). These results contrast with the
common view among melittologists that species of
Neocorynura may be polylectic as in other members
of the tribe Augochlorini, an idea that is also
supported by the generalized structure of the
mouthparts in Neocorynura in relation to other
augochlorines, and the scarce floral records
(Michener, 2000; Eickwort, 1969; Moure & Hurd,
1987; Smith-Pardo, 2005a). However, our sample
size was small and restricted to a single season and
locality, thus limiting conclusive interpretations on
the foraging behavior of the studied species.
Finally, the collections of individuals of both sexes
and of both species in Iguaque in every month of the
year suggest that the species are multivoltine.
Furthermore, pollen gathering activity by N. muiscae
sp. nov. females during the dry season (Table V)
indicates that they are nesting year-round.
Acknowledgments
This work is dedicated to the memory of Juan Pablo
Cardenas, beloved father of AHS-P. We thank
Daniel Bennett, William Wcislo, M. S. Engel and
C. D. Michener, Anne Zillikens and two anonymous
reviewers for their comments and suggestions on the
manuscript; Paula Montoya and Monica Ospina for
their help in the field and their comments on the
biology of the species; Carlos Sarmiento and
Guiomar Nates-Parra for lending us some of the
specimens for study, and finally The Instituto de
Ciencias Naturales, Universidad Nacional de
Colombia, for allowing GB to use the Palynological
laboratory. We are indebted to Fernando Fernandez,
Diana C. Arias and Jose E. Castillo from the Seccion
de Entomologıa of the Instituto de Investigacion
en Recursos Biologicos Alexander von Humboldt,
and El Sistema de Parques Nacionales Naturales
de Colombia for their outstanding logistical support
and for generously providing both permission to
work in the park and lodging to V.G. during
this study. Financial support for V.G. and AHS-P
was provided by Idea Wild. This is a contribution
of the Division of Entomology, University of
Kansas.
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