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© Bryan Danforth
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Lasioglossum abanci, female, gena |
© Bryan Danforth
· 1
Lasioglossum abanci, female, propodeum |
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© Bryan Danforth
· 1
Lasioglossum abanci, female, scutum |
© USDA Bee Biology and Systematics Laboratory, Logan Utah
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Lasioglossum abanci, female, forwing |
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© USDA Bee Biology and Systematics Laboratory, Logan Utah
· 1
Lasioglossum abanci, female, propodeum |
© USDA Bee Biology and Systematics Laboratory, Logan Utah
· 1
Lasioglossum abanci, female, scutum |
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© USDA Bee Biology and Systematics Laboratory, Logan Utah
· 1
Lasioglossum abanci, female, vertex with strong transvers striations |
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Overview | |
Identification Summary: This species is thought likely to be the same as L. obscurum but that still needs to be verified. For now we look we suggest you use L. obscurum as the primary name.
Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.
FEMALE�Length 6 mm; head and thorax olive green, abdomen more piceous; pubescence very short and thin, entirely whitish; length and breadth of head subequal; clypeus projecting about two-thirds below suborbital line; supraclypeal area somewhat shorter than clypeus; eyes somewhat convergent below; lateral ocelli considerably nearer eyes than to each other; cheeks subequal to eyes in width; punctures of upper part of face very close but deep and distinct, becoming quite sparse below level of antennae, sparse on the shining supraclypeal area and quite shallow and indistinct, as well as sparse, on the darkened clypeus; punctures on vertex medially very obscure, becoming fine and well separated, but distinct between eyes and ocelli; cheeks finely substriate; hypostomal carinae parallel, area on each side shining and relatively impunctate; scutum and scutellum shining, punctures fine but quite deep and distinct, well separated medially, becoming quite close at extreme sides (distribution about as in rohweri, fig. 99) pleura rather dull anteriorly, becoming somewhat shining posteriorly, where definite punctures are visible at certain angles; dorsal area of propodeum rather coarsely striate, the striations not quite reaching the rounded posterior margin medially; lateral faces of propodeum somewhat shining; wings subhyaline, veins and stigma brownish-testaceous, 2nd submarginal cell equalling 3rd in length, receiving 1st recurrent vein near its apex; tegulae brownish-hyaline; legs dark in general, the more apical tarsal segments becoming more or less brownish; abdominal terga shining, punctures minute and well separated, those on basal tergum very sparse and barely visible, apical impressed areas rather broad, entirely impunctate, more or less reddened, discal pubescence entirely pale, thin and inconspicuous, surface of apical terga fully exposed.
DISTRIBUTION�Minnesota to Brunswick and the New England states, south to Georgia; April to September.
FLOWER RECORDS�Aruncus, Houstonia purpurea, Krigia, Melilotus, Rubus and Rudbeckia.
This species is very much like the oblongus Lovell, and may prove to only be a variant of it. No male, differing from that of oblongus, has been found that has an apparent relation to abanci.
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Identification |
Extracted by Gibbs J., 2011. Revision of the metallic Lassioglossum (Dialictus) of the eastern North American (Hymenoptera: Halictidae: Halictini). Zootaxa.
Lasioglossum (Dialictus) abanci (Crawford)
Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) abanci, p. 1111 (catalogue); Mitchell, 1960: Dialictus abanci
♀, p. 376 (redescription); Krombein, 1967: Lasioglossum (Dialictus) abanci, p. 462 (catalogue); Hurd, 1979: Dialictus
abanci, p. 1963 (catalogue); Moure & Hurd, 1987: Dialictus abanci, p. 97 (catalogue).
Diagnosis. Female L. abanci can be recognised by the following diagnostic combination: head round to slightly elongate (length/width ratio = 1.00�1.02); mesoscutum polished due to weak microsculpture, punctures sparse between parapsidal lines (i=1�2.5d), denser laterad of parapsidal line (i=1�1.5d); tegula reddish brown; mesepisternum rugulose, obscurely punctate; metapostnotum with distinct medial carina and weak submedial rugae not extending more than 2/3 distance to posterior margin (Fig. 40); T1 acarinarial fan with wide dorsal opening (Fig. 40); metasomal terga brown, polished
due to weak microsculpture, apical halves nearly impunctate, T2 basomedially with sparse punctures (i=2�5d); T2�T3 basolaterally and T4 entirely with very sparse tomentum and weak apical fringes. They are similar to L. planatum and L. oblongum, both of which have mesoscutum dull due to microsculpture and mesepisternum impunctate. Female L.oblongum have coarser metapostnotal rugae. Female L. subviridatum and L. taylorae are also similar but have denser punctation on metasomal terga. Female L. taylorae also have head elongate.
Male L. abanci can be recognised by the following diagnostic combination: head elongate (length/width ratio = 1.04�1.06); facial tomentum limited to lower paraocular area; F2�F10 elongate (length/width ratio = 1.86�2.08); mesoscutum polished, punctures fine, sparse between parapsidal lines (i=1�2.5d) (Fig. 42); mesepisternum rugulose; tarsi reddish brown; metasomal terga without tomentum; apical impressed areas impunctate, and S3 with sparse apical pubescence.
They are most similar to L. laevissimum and L. subviridatum, both of which have brownish yellow tarsi. Male L. laevissimum also have dense pubescence across S3.
Redescription. FEMALE. Length 5.45�6.23 mm; head length 1.51�1.70 mm; head width 1.51�1.66 mm; forewing length 4.66�4.72 mm.
Colouration. Head and mesosoma blue with green reflections. Clypeus with apical half blackish brown and basal
half, and supraclypeal area greenish. Antenna dark brown, flagellum with ventral surface reddish brown. Tegula translucent
reddish brown. Wing membrane subhyaline, venation and pterostigma dark amber. Legs dark brown, except medioand
distitarsi ferruginous. Metasoma blackish brown, terga and sterna with apical margins reddish brown.
Pubescence. Dull white. Sparse. Head and mesosoma with moderately dense woolly hairs (1�1.5 OD), longest on
genal beard, metanotum, and mesopleuron (1.5�2 OD). Lower paraocular area and gena without subappressed tomentum.
Propodeum with dense plumose hairs on lateral and posterior surfaces (2�2.5 OD). Metasomal terga with sparse,
fine hairs. T1 acarinarial fan with dorsal opening wider than lateral hair patches. T2�T3 basolaterally and T4 basally with
at most small patch of tomentum. T2 apicolateral and T3�T4 apical margins with very sparse apical fringes, virtually
absent.
Surface sculpture. Face imbricate, punctation fine. Clypeus polished, basal margin weakly imbricate, punctation
sparse (i=1�3d). Supraclypeal area polished medially, punctation sparse (i=1�3.5d). Lower paraocular area and antennocular
area punctation moderately sparse (i=1�1.5d). Upper paraocular area and frons reticulate-punctate.
Ocellocular area punctation obscure (i=1�1.5d). Gena lineolate. Postgena weakly imbricate. Mesoscutum polished,
imbricate medially, punctation fine, moderately sparse between parapsidal lines (i=1�2.5d), relatively sparse laterad of
parapsidal line (i=1�1.5d), dense on anterolateral portion (i≤d). Mesoscutellum polished, submedial punctation sparse
(i=2�5d). Axilla punctate. Metanotum ruguloso-imbricate. Pre�pisternum rugulose. Hypoepimeral area imbricate,
obscurely punctate (i=1�1.5d). Mesepisternum dorsal half rugulose, obscurely punctate (i=1�2d), ventral half ruguloseimbricate.
Metepisternum with dorsal half rugoso-carinulate, ventral half imbricate. Metapostnotum rugoso-carinulate,
medial carina nearly reaching posterior margin, submedial rugae not extending more than 2/3 distance to posterior margin.
Propodeum with dorsolateral slope rugulose-imbricate, lateral surface imbricate-tessellate, posterior surface tessellate.
Metasomal terga polished except weakly coriarious on apical margins, punctation on basal halves sparse (i=1�2d),
especially medially (i=1�4d), absent from apical half except along premarginal line and apicolaterally.
Structure. Head round (length/width ratio = 1.00�1.02). Eyes weakly convergent below (UOD/LOD ratio = 1.14�
1.17). Clypeus 2/3 below suborbital tangent, apicolateral margins convergent. Antennal sockets close (IAD/OAD < 0.5).
Frontal line carinate, ending 2.5�3 OD below median ocellus. Gena narrower than eye. Inner metatibial spur pectinate
with 3�5 branches. Metapostnotum moderately elongate (MMR ratio = 1.21�1.26), posterior margin narrowly rounded
onto posterior surface. Propodeum with oblique carina very weak, lateral carina weak, not reaching dorsal surface.
MALE. Similar to female except for the usual secondary sexual characters and as follows. Length. 5.32�5.75 mm;
head length. 1.56�1.63 mm; head width. 1.48�1.57 mm; forewing length. 4.48�4.54 mm.
Colouration. Head blackish blue. Mesosoma greenish except propodeum bluish. Flagellum with ventral surface
bright orange-yellow. Tegula reddish brown with amber margin. Pterostigma reddish brown. Legs brown, except tarsi
reddish brown.
Pubescence. Lower paraocular area width moderately dense tomentum partially obscuring surface. Gena without
evident tomentum. S3 apicolaterally and S4�S5 laterally with moderately dense patches of plumose hairs (1�1.5 OD).
Surface sculpture. Clypeal punctation sparse (i=1�3d). Metanotum rugose. Metapostnotum coarsely rugoso-carinulate,
reaching posterior margin. Propodeum with dorsolateral slope, lateral surface and posterior surface rugose.
Structure. Head relatively elongate (length/width ratio = 1.04�1.06). Eyes strongly convergent below (UOD/LOD
ratio = 1.46). Clypeus 1/2 below suborbital tangent, apicolateral margins weakly convergent. Supraclypeal area elongate.
Antennal sockets distant (IAD/OAD > 1.2). Frontal line carinate, ending 1.5�2 OD below median ocellus. Pedicel shorter
than F1. F2 length 1.9�2.1X F1. F2�F10 elongate (length/width ratio = 1.86�2.08). Metapostnotum with dorsal surface
relatively short (MMR ratio = 1.20�1.33), posterior margin sharply angled onto posterior surface.
Terminalia. S7 with median lobe columnar, apex rounded (Fig. 43). S8 with apicomedial margin weakly convex
(Fig. 43). Genital capsule as in Fig. 43. Gonobase with ventral arms narrowly separated. Gonostylus small. Retrorse lobe
elongate, attenuated apically.
Range. Wisconsin to Georgia (Fig. 44). USA: GA, IL, IN, NC, NY, WI, WV.
Floral records. APIACEAE: Thaspium barbinode; ASTERACEAE: Krigia, Rudbeckia; FABACEAE: Melilotus;
ROSACEAE: Aruncus, Fragaria, Rubus; RUBIACEAE: Houstonia purpurea.
DNA Barcode. Unavailable.
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Comments. Uncommon.
The identity of L. abanci has been uncertain for a long time. Mitchell (1960) suggested that L. abanci may only be a
form of L. oblongum. The identity of the latter species has also been uncertain and the name has been over applied in the
past (Gibbs 2010b). The large range distribution attributed to L. abanci previously (Mitchell 1960; Moure & Hurd 1987)
was in part due to misidentification of other species such as L. oblongum, L. planatum, and L. subviridatum. Material
from near the type locality of L. abanci clearly match the holotype. Despite examination of many thousands of specimens
of Lasioglossum (Dialictus), including many near and around the type locality, only a small number of L. abanci have
been found in collections.
Extracted form Halictus albanci Crawford 1932 Proc. Ent. Soc. Wash. 34
Female- Length 7mm. Form slender, abdomen noticeably pointed at apex, head and thorax very dark green, with scanty ochraceaous pubescence; abdomen purplish black with only scattered ochraceous hairs; facial quadrangle slightly longer than wide, clypeus well produced; head and thorax conspicuously reticulately lineolate; apical half of clypeus and a spot on each side of clypeus smooth; face in front of occlli with crowded punctures, below this and sides of face with sparse punctures becoming scattered on clypeus and suptaclypeal area; meonotum with sparse fine punctures, those at rear varying in size, which is especially so on scutellum; propodeum with weak irregular longitudinal regule not reaching apex which is conspicuously reticulated; median ruga stronger, straighter and usually reaching almost to apex; mesopleurae finely rugulose and with scattered punctures; sides of propodeum and truncation reticulated, surrounding carina not reaching to upper lateral angles; tegulae dark; wings deeply infuscated stigma and veins brown; legs dark, with ochraceous pubescence; abdomen delicately reticulately lineolated, fist segment one with a few scattered minutely punctures, second segment with a few more punctures basally, apical part impunctate.
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Updated: 2024-04-18 14:46:49 gmt
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