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Lasioglossum bruneri (Crawford, 1902)
Halictoxenos bruneri Crawford, 1902; Halictus brimleyi Crawford, 1932; Dialictus bruneri (Crawford, 1902)

Life   Insecta   Hymenoptera   Apoidea   Halictidae   Lasioglossum
Subgenus: Dialictus

Lasioglossum bruneri, Mid-Atlantic Phenology
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Lasioglossum bruneri, Mid-Atlantic Phenology

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Lasioglossum bruneri CFP FEM comp
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Lasioglossum bruneri CFP FEM comp
Lasioglossum bruneri CFP MALE comp
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Lasioglossum bruneri CFP MALE comp

Lasioglossum bruneri, Tom Murray
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Lasioglossum bruneri, Tom Murray
Lasioglossum bruneri, dorsal habitus
Ellen Bulger · 1
Lasioglossum bruneri, dorsal habitus

Lasioglossum bruneri, face
Ellen Bulger · 1
Lasioglossum bruneri, face
Lasioglossum bruneri, profile
Ellen Bulger · 1
Lasioglossum bruneri, profile

Lasioglossum bruneri
Ellen Bulger · 1
Lasioglossum bruneri
Lasioglossum bruneri, female, forwing
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Lasioglossum bruneri, female, forwing

Lasioglossum bruneri, female, vertex with strong trans striations
© USDA Bee Biology and Systematics Laboratory, Logan Utah · 1
Lasioglossum bruneri, female, vertex with strong trans striations
Lasioglossum bruneri, female, hypostomal cavity
© Dimitri Bourdin · 1
Lasioglossum bruneri, female, hypostomal cavity

Lasioglossum bruneri, female, below
© John B. Pascarella, Valdosta State University, Georgia · 1
Lasioglossum bruneri, female, below
Lasioglossum bruneri, female, face
© John B. Pascarella, Valdosta State University, Georgia · 1
Lasioglossum bruneri, female, face

Lasioglossum bruneri, female, face side
© John B. Pascarella, Valdosta State University, Georgia · 1
Lasioglossum bruneri, female, face side
Overview

Identification Summary: Large; shovel-shaped hypostomal cavity with raised or carinate edges; large pits and fairly dense on scutum; mesepisturnum heavily rugose; propodeal triangle striations distinctive but hard to describe; lots of appressed hairs on abdomen.

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 6-7 mm.; head and thorax brassy-green, abdomen piceous; pubescence short and thin, entirely pale yellow, more copious on thorax laterally, abdomen to some degree covered with appressed tomentum; head somewhat broader than long; clypeus broadly convex, projecting about one- half below suborbital line; supraclypeal area considerably broader than long, shorter than clypeus; eyes convergent below; lateral ocelli nearer eyes than each other; cheeks subequal to eyes in width; face below ocelli coarsely and deeply punctate, closely so medially, punctures somewhat separated laterally, becoming minute and irregular on shining vertex; cheeks above somewhat shining along eye margins, but becoming coarsely striate posteriorly and below; hypostomal carinae widely divergent apically, conspicuously produced just back of apical angle, the hypostome thus deeply excavated; lower half of face somewhat shining between the coarse, deep and rather close punctures, those on supraclypeal area somewhat finer but deep, distinct and close, those on clypeus similarly rather fine and close along upper margin, becoming more sparse and quite deep and distinct toward apical margin, apical half blackened; scutum and scutellum rather dull, punctures coarse, deep and distinct, scutum rugose on each side anteriorly, punctures slightly separated medially, crowded between notaulices and tegulae (much like nymphaearum, fig. 99); pleura very coarsely rugose above, becoming more rugoso-striate below and posteriorly; dorsal area of propodeum rather coarsely rugoso-striate medially, becoming more regularly and coarsely striate laterally, posterior face coarsely rugose, almost completely encircled with a salient rim, lateral faces more finely striate; wings subhyaline, veins and stigma brownish testaceous; tegulae brownish-testaceous posteriorly, becoming more yellowish anteriorly; legs piceous basally, becoming reddish-testaceous apically, front trochanters somewhat flattened, with anterior surface shallowly excavated, front coxae not carinate; basal abdominal tergum shining, very minutely and obscurely punctate across center of disc, tergum 2 more fully punctate, but punctures minute and obscure, disc densely pale tomentose toward base laterally, terga 3 and 4 densely pale tomentose, obscuring the surface.

MALE—Length 6.5 mm.; head and thorax bluish-green, abdomen piceous; pubescence dense on face, otherwise short, thin, entirely pale; length and breadth of head subequal; clypeus convex, rather narrow, projecting about one-half below suborbital line; supraclypeal area about as long as broad, equal in length to clypeus; eyes strongly convergent below; lateral ocelli slightly nearer eyes than to each other; antennae much nearer eyes than to each other, basal segment of flagellum about as broad as long, considerably longer than pedicel, following segments longer, but not twice as long as broad, brownish-testaceous beneath, piceous above; cheeks much narrower than eyes; punctures of face below ocelli deep and distinct, coarse and very close, becoming finer and indistinct on vertex; cheeks dull, punctures indistinct above, becoming rather coarsely striate posteriorly and below; hypostomal carinae slightly divergent, ending very close to articulation of mandible; lower half of face somewhat shining, punctures deep and distinct, quite close but not crowded, those on supraclypeal area finer and distinctly separated, those on clypeus well separated and rather fine, quite close along upper margin, obscured by tomentum; scutum somewhat shining, punctures coarse, deep and distinct, rather sparse in center, becoming close laterally, scutellum swollen on each side of a median depression, punctures irregularly scattered and rather coarse; pleura very coarsely rugose anteriorly becoming more rugoso-striate posteriorly, dorsal area of propodeum very coarsely striate, hind margin sharply carinate, lateral faces, coarsely striate; wings subhyaline, veins and stigma brownish testaceous; tegulae piceous; all tarsi bright yellow, legs otherwise piceous; spurs yellow; abdominal terga smooth and shining, minutely and quite closely punctate, depressed apical portion of discs impunctate; apical margin of sternum 5 straight; sternum 7 similar to that of reticulatus (fig. 101) ; retrorse lobe of genital armature quite broad, covered with short and fine but distinct pubescence, gonostylus much like cressonii (fig. 102).

DISTRIBUTION—Nebraska to New York, south to Florida; February to October.

FLOWER RECORDS — Amelanchier, Chrysanthemum, Crataegus, Eryngium, Euonymus, Fragaria, Hydrangea, hex, Polygonum, Rhus, Rudbeckia, Senecio, Solidago, Symplocos and Vernonia. This is the first description of the male of this species.


Retrieved from: Gibbs, J. 2010. Revision of the metallic species of Lasioglossum (Dialictus)in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa; 2591, 76-80


Halictus Bruneri Crawford, 1902: 237. ♀. Holotype. ♀ USA, Nebraska, West Point, 10.vi.1901 (J.C. Crawford); [NMNH: 8231]. Examined. Halictus brimleyi Crawford, 1932: 71. ♀. Holotype. ♀ USA, North Carolina, Bryson City, 24.v.1923 on Ilex opaca (J.C. Crawford); [NMNH: 40306]. Examined. Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) bruneri, p. 1112 (catalogue, synonymy); Mitchell, 1960: Dialictus bruneri ♀♂, p. 384 (redescription); Krombein, 1967: Lasioglossum (Dialictus) bruneri, p. 462 (catalogue); Hurd, 1979: Dialictus bruneri, p. 1964 (catalogue); Moure & Hurd, 1987: Dialictus bruneri, p. 92 (catalogue).


Diagnosis. Females of L. bruneri can be distinguished from all other Canadian Dialictus by the deeply excavated hypostomal cavity with widely divergent hypostomal carinae (Fig. 77D), strongly reflexed in lateral view. Female L. bruneri may be further recognised by the extremely strong sculpture of head and mesosoma and strong propodeal carinae. They are most similar to L. reticulatum, known only from the Eastern United States, which have the hypostomal carinae less divergent and not greatly reflexed.


Males of L. bruneri can be recognised by the rugose anterior margin of the mesoscutum, the coarsely rugose mesepisternum, and brown tibiae and femora. They are most similar to the USA species L. reticulatum which have extensive reddish brown colouration on the tibiae and apical and basal portions of the femora.


Redescription. FEMALE. Length 6.04–7.10 mm; head length 1.70–1.99 mm; head width 1.82–2.18 mm; forewing length 4.45–5.20 mm.


Colouration. Head and mesosoma green with bluish reflections. Mandible orange. Antenna blackish brown, flagellum with ventral surface brown. Tegula reddish brown. Wing membrane subhyaline, venation and pterostigma amber. Legs brown, tarsi reddish brown to amber. Metasoma blackish brown, terga and sterna with apical margins reddish brown.


Pubescence. Dull white to yellowish white. Moderately dense. Head and mesosoma with moderately dense woolly hairs (1–1.5 OD), longest on genal beard, metanotum and mesopleuron (2–2.5 OD). Paraocular area with sparse subappressed hairs. Gena with sparse tomentum. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (2–2.5 OD). Metasomal terga with sparse, fine setae. T1 acarinarial fan open above, not reaching dorsal margin of declivitous surface. T2 basolateral area obscured by dense tomentum. T3–T4 disc largely obscured by dense tomentum and with sparse, fringes. T2 apicolateral and T3–T4 apical margins with weak fringes.


Surface sculpture. Face polished, weakly imbricate, punctation strong. Clypeal punctation moderately dense (i=1–1.5d). Supraclypeal area and lower paraocular are punctation dense (i

Structure. Head wide (length/width ratio = 0.92–0.93). Eyes convergent below (UOD/LOD ratio = 1.15– 1.18). Labral tubercle small. Mandible subapical tooth present. Clypeus 1/2 below suborbital line, apicolateral margins subparallel. Antennal sockets close (IAD/OAD < 0.5). Frontal line carinate, ending <2 OD below median ocellus. Gena nearly as wide as eye. Hypostome deeply excavated, carinae widely divergent towards mandible bases (Fig. 77D), distinctly reflexed in lateral view. Pronotum with dorsolateral angle obtuse. Protrochanter depressed near base. Inner metatibial spur pectinate with 3–4 teeth. Metapostnotum delimited from remainder of dorsal surface weak carina. Metapostnotum moderately elongate (MMR ratio = 1.36–1.40), posterior margin separated from posterior surface by carina. Propodeum with oblique carina strong, lateral carina reaching dorsal margin.


MALE. Similar to female except for the usual secondary sexual characters and as follows. Length 5.49– 6.60 mm; head length 1.70–1.92 mm; head width 1.73–1.92 mm; forewing length 4.45–4.88 mm.


Colouration. Head and mesosoma dull metallic blue. Flagellum with ventral surface brownish yellow. Tegula dark brown. Wing membrane subhyaline, venation and pterostigma yellowish brown. Tarsi yellow. Metasoma blackish brown.


Pubescence. Face with tomentum obscuring lower paraocular area and partially obscuring clypeus, supraclypeal area, upper paraocular area and frons. S2–S3 with dense apical subappressed hairs and S4 with apicolateral subappressed hairs. Surface sculpture. Strong throughout. Mesoscutellum reticulate. Metepisternum rugoso-striate. Metasomal terga with apical impressed margins impunctate.


Structure. Head moderately wide to round (length/width ratio = 0.97–1.00). Eyes strongly convergent below (UOD/LOD ratio = 1.47–1.52). Clypeus 2/3 below suborbital line, apicolateral margins subparallel. Antennal sockets distant (IAD/OAD > 1.1). Frontal line carinate, ending <2 OD below median ocellus. Hypostomal carinae only slightly divergent towards mandibles. Pedicel shorter than F1. F2 length 1.8–2.0X F1. F2–F10 moderately elongate (length/width ratio = 1.39–1.71). Metapostnotum moderately elongate (MMR ratio = 1.27–1.31), posterior margin sharply angled onto posterior surface.


Terminalia. S7 with median lobe clavate, sides concave, apex rounded (Fig. 78D). S8 with apicomedial margin weakly convex (Fig. 78D). Genitalia as in Fig. 78D–E. Gonobase with ventral arms narrowly separated. Gonostylus narrow and elongate, dorsal setae elongate. Retrorse lobes elongate, reflexed apically.


Range. Ontario south to Florida, west to Nebraska


Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa.


Lasioglossum (Dialictus) bruneri (Crawford)


Halictus Bruneri Crawford, 1902a: 237. ♀.

Holotype. ♀ USA, Nebraska, West Point, 10.vi.1901 (J.C. Crawford); [NMNH: 8231]. Examined.

Halictus brimleyi Crawford, 1932: 71. ♀.

Holotype. ♀ USA, North Carolina, Bryson City, 24.v.1923 on Ilex opaca (J.C. Crawford); [NMNH: 40306]. Examined.

Taxonomy. Michener, 1951: Lasioglossum (Chloralictus) bruneri, p. 1112 (catalogue, synonymy); Mitchell, 1960: Dialictus bruneri ♀♂, p. 384 (redescription); Krombein, 1967: Lasioglossum (Dialictus) bruneri, p. 462 (catalogue); Hurd,1979: Dialictus bruneri, p. 1964 (catalogue); Moure & Hurd, 1987: Dialictus bruneri, p. 92 (catalogue); Gibbs, 2010b: Lasioglossum (Dialictus) bruneri ♀♂, p. 76 (redescription, key).

Diagnosis. Female L. bruneri can be recognised by the diagnostic character of hypostomal carinae widely divergent (Fig. 11B) and strongly produced distally. They may be further distinguished by the following: size large, head and mesosoma coarsely sculptured, and protrochanter excavated anteriorly. They are very similar to L. reticulatum, which has less widely divergent hypostomal carinae, which are not produced distally, and normal trochanters without anterior excavation.

Male L. bruneri can be recognised by the following diagnostic combination: mesoscutum rugose anteriorly, mesepisternum coarsely rugose, and tibiae and femora brown. They are most similar to L. reticulatum, which has the tibiae and femoral apices and bases reddish brown. Male L. cressonii are also similar but have distinct mesoscutal punctures anteriorly and less clypeal pubescence, not obscuring the surface.

Range. Ontario south to Florida, west to Nebraska. USA: GA, IL, IN, KS, MA, MD, MI, NC, NE, NM, NY, SC, TN, TX, VA, WI, WV. CANADA: ON.

DNA Barcode. Available. Multiple sequences.

Comments. Common.

Some females of L. bruneri, particularly in the Midwest, do not have strongly produced hypostomal carinae. These have sometimes been mistaken for L. reticulatum.


Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Adoxaceae  Viburnum prunifolium @ AMNH_BEE (1)

Viburnum @ AMNH_BEE (1)
Apiaceae  Daucus carota @ UCMS_ENT (2)
Aquifoliaceae  Ilex opaca @ AMNH_BEE (1)
Asteraceae  Solidago sempervirens @ UCMS_ENT (1)
Brassicaceae  Barbarea vulgaris @ UCMS_ENT (2)
Caprifoliaceae  Lonicera sp @ UCMS_ENT (1)
Convolvulaceae  Convolvulus sepium @ AMNH_BEE (1)
Ericaceae  Vaccinium corymbosum @ AMNH_BEE (1)
Fabaceae  Albizia @ AMNH_BEE (1)

Melilotus officinalis @ UCMS_ENT (2)
Montiaceae  Claytonia virginica @ AMNH_BEE (1)
Rosaceae  Malus @ AMNH_BEE (1)
Salicaceae  Salix atrocinerea @ AMNH_BEE (2)

Salix humilis @ AMNH_BEE (1)
Solanaceae  Nicandra physalodes @ AMNH_BEE (1)
_  Bee @ LAR (2)

Withheld @ BBSL__CAVE (12)

blueberry @ NLA (2)

cucurbit @ NLA (14)

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Updated: 2019-10-14 11:00:40 gmt
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