Lasioglossum (Dialictus) planatum (Lovell)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216 : 158

Lasioglossum (Dialictus) planatum (Lovell)

Halictus planatus Lovell, 1905b: 300 . Ƥ

Lectotype. Ƥ 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 Ƥ, 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.