© Copyright source/photographer · 9 Lasioglossum planatum, Mid-Atlantic Phenology Click on map for details about points. IDnature guides Bee species Lasioglossum Lasioglossum Dialictus female Lasioglossum Dialictus male Links Hosts 1 thumbnail  •  slide show Overview Identification Summary: Moderate sized; a very typical looking species; propodeal triangle with striations almost reaching the rim; T1 hair fan open to widely open at the top; apical rim of T2 with scattered pits or no pits; abdomen has subtle but noticeable metallic reflections when specimens are fresh and well cleaned; T2 and T3 with noticeable patches of white appressed hairs on their sides in some individuals but can also have only a few appressed hairs; T4 usually with only a few appressed hairs present; in the past this species was called by Droege rohweri/lineatulum because the pattern of the scutum matched L. rohweri and the pattern of the abdomen matched L. lineatulum. Retrieved from: Gibbs, J. 2010. Revision of the metallic species of Lasioglossum (Dialictus)in Canada (Hymenoptera, Halictidae, Halictini). Zootaxa; 2591, 258-261 Halictus planatus Lovell, 1905b: 300. ♀ Lectotype. ♀ USA, Maine, Waldoboro, (J.H. Lovell); [NMNH: 71572] by T.B. Mitchell. Examined. Taxonomy. Wolf & Ascher, 2009: Lasioglossum (Dialictus) planatum, p. 144 (faunal list). Diagnosis. See diagnosis for L taylorae and L. ephialtum. Redescription. FEMALE. Length 5.37–6.10 mm; head length 1.42–1.56 mm; head width 1.46–1.58 mm; forewing length 3.84–4.15 mm. Colouration. Head and mesosoma bluish green with golden reflections. Clypeus with apical margin blackish brown. Supraclypeal area golden. Antenna dark brown, F6–F10 with ventral surface yellow-orange to brown. Tegula reddish to yellowish brown. Wing membrane subhyaline, venation and pterostigma pale yellowish brown. Legs brown, medio- and distitarsi reddish brown. Metasoma dark 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 (2–2.5 OD). Lower paraocular area and gena with sparse subappressed hairs. Propodeum with moderately dense plumose hairs on lateral and posterior surfaces (2–2.5 OD). Metasomal terga with sparse, fine setae. T1 acarinarial fan with dorsal opening equal to lateral hair patches. T2–T3 basolateral area with sparse tomentum. T4 with tomentum sparsely scattered across disc. Surface sculpture. Face imbricate. Clypeus polished, weakly imbricate, punctation strong (i=1–3d). Supraclypeal area polished or weakly imbricate medially, punctation moderately sparse (i=1–2d). Lower paraocular area punctation dense (i≤1d). Antennocular area punctation moderately sparse (i=1–2.5d). Upper paraocular area and frons reticulate. Ocellocular area irregularly punctate. Gena lineolate. Postgena polished. Mesoscutum tessellate anteromedially, remainder imbricate to moderately polished, punctation fine, sparse between parapsidal lines (i=1–2.5d), close laterad of parapsidal lines (i≤d), contiguous on anterolateral portion. Mesoscutellum polished, submedial punctation sparse (i=2–4d). Axilla punctate. Metanotum imbricate. Preëpisternum rugulose. Hypoepimeral area weakly ruguloso-imbricate. Mesepisternum rugulose above, weakly ruguloso-imbricate below, sometimes with obscure punctation throughout. Metepisternum with dorsal half striate, ventral half imbricate. Metapostnotum incompletely striate, submedial zone weakly sculptured or imbricate. Propodeum with dorsolateral slope rugulose, lateral surface tessellate, posterior surface imbricate. Metasomal terga polished, weakly coriarious, punctation on basal halves (i=1–2d), apical half impunctate (except along premarginal line). Structure. Head moderately wide (length/width ratio = 0.97–0.98). Eyes convergent below (UOD/LOD ratio = 1.24–1.29). Clypeus projecting 2/3 below suborbital line, apicolateral margins convergent. Antennal sockets close (IAD/AOD ratio < 0.5). OOD less than IOD. Gena narrower than eye. Inner metatibial spur pectinate with teeth. Metapostnotum moderately elongate (MMR ratio = 1.23). Propodeum with oblique carina virtually absent, lateral carina not reaching dorsal margin. MALE. Unknown. Range. Newfoundland, New Brunswick west to British Columbia and Northwest Territories, south to Maine (Fig. 182). Additional material examined. CANADA: ALBERTA: 1♀ Kananaskis, U of C field station, 1391 m, 19.vi.2007 (Gibbs & Sheffield); BRITISH COLUMBIA: 1♀ 10.vii.2002; 1♀ 11.vii.2002; NEW BRUNSWICK: 4 ♀♀ Kent Co., St. Ignace, N46.707 W071.054, 32.vii.2005 (M. Gravel); NEWFOUNDLAND: 1♀ St. Davids, N.45’50.557’’ W66’ 54.682, 17.vi.2004 (Goulet, Boudreault & Badiss); 1♀ Fort Providence, N61.2204 W117.6051, 21.vi.2005 (C. Sheffield & A. Gunn); NORTHWEST TERRITORIES: 1♀ Hay River, banks, N60°33´ W116°08´, 7.viii.2004 (A. Gunn); NOVA SCOTIA: 3♀♀ Kings Co., Up. Canard, N45.135 W064.489, 29.v.2002 (C. Sheffield); [PCYU]; QUEBEC: 1♀ St. Anne’s, 17.v.1931; [BMNH]; 1♀ W of Normandin, N48°48´13.1´´ W72°36´28.6´´, 170 m, 8.vi.2009 (M. Chagnon); 1♀ W of Normandin, N48°51´15.1´´ W72°37´01.5´´, 185 m, 25.vi.2009 (M. Chagnon); 2♀♀ W of Normandin, N48°51´25.3´´ W72°36´36.6´´, 186 m, 8.vi.2009 (M. Chagnon); [PCYU]; USA: WISCONSIN: 1♀ Waukesha Co., Scuppernong Prairie, N42.89548 W088.50513, 2.vii.2006 (A. Wolf); [PCYU]. Floral records. See floral records for L. oblongum. ONAGRACEAE: Chamerion angustifolium. Comments. Uncommon. This species has long been treated as a synonym of L. oblongum (Lovell 1908). For discussion see the Comments section for that species. This is a member of the L. viridatum species-group. Extracted from Jason Gibbs. 2011. Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini.) Zootaxa. Lasioglossum (Dialictus) planatum (Lovell) Halictus planatus Lovell, 1905b: 300. ♀ Lectotype. ♀ USA, Maine, Waldoboro, (J.H. Lovell); [NMNH: 71572] designated herein. Examined. Taxonomy. Wolf & Ascher, 2009: Lasioglossum (Dialictus) planatum, p. 144 (faunal list, combination); Gibbs, 2010b: Lasioglossum (Dialictus) planatum ♀, p. 259 (redescription, key). Diagnosis. Female L. planatum can be recognised by the following diagnostic combination: mesoscutal punctures sparse between parapsidal lines; mesepisternum rugulose; metapostnotum with weak rugae, except long medial carina; T1 polished due to lack of microsculpture; T1 acarinarial fan with wide dorsal opening; and metasomal terga with sparse tomentum limited to basolateral patches. They are similar to L. ephialtum, which has stronger metapostnotal rugae, which reach the posterior margin and more abundant tomentum on the metasomal terga. Male unknown. Range. Newfoundland, New Brunswick west to British Columbia and Northwest Territories, south to New York. USA: MA, ME, NY, WI. CANADA: AB, BC, NB, NF, NS, NT, ON, PE, PQ. DNA Barcode. Available. Multiple sequences. Comments. Uncommon. The name-bearing type has lectotype labels from both Mitchell and Covell. No publication by either of these authors could be found that makes a valid lectotype designation. Lasioglossum planatum was recently resurrected from synonymy with L. oblongum by Gibbs (2010b). To maintain stable usage of the name, the specimen indicated above is designated as the lectotype. Names Scientific source: Discover Life bee species guide and world checklist, Ascher and Pickering. Supported by National Biological Information Infrastructure National Science Foundation Hosts · map Family Scientific name @ source (records) Anacardiaceae   Rhus glabra @ AMNH_BEE (1) go to Discover Life's Facebook group Updated: 2024-04-24 07:01:52 gmt Discover Life | Top © Designed by The Polistes Corporation