Lasioglossum (Dialictus) versans (Lovell)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216 : 205-206

Lasioglossum (Dialictus) versans (Lovell)

Halictus versans Lovell, 1905a: 39 . Ƥ (3 misdet.).

Lectotype. Ƥ USA, Maine, Waldoboro (J.H. Lovell); [NMNH: 71573] designated herein. Examined.

Halictus (Chloralictus) consonus Sandhouse, 1924: 30 . 3.

Holotype. 3 USA, Connecticut, Colebrook, 1– 7.ix, (W.M. Wheeler); [ NMNH: 26429]. Examined. Halictus (Chloralictus) brevibasis Cockerell, 1938a: 3 . 3.

Holotype. 3 CANADA, Saskatchewan, Lake Waskesiu, beginning of portage to Heart Lakes, 31.viii.1936 (T. & W. Cock-

erell); [ AMNH]. Examined.

Evylaeus divergenoides Mitchell, 1960: 351 . 3. [new synonymy]

Holotype. 3 USA, Michigan, Mackinac Co., St. Ignace, 23.vii.1921 (T.H. Hubbell); [ NMNH: 75204]. Examined

Taxonomy. Lovell, 1908: Halictus versans 3, p. 38 (description); Michener, 1951: Lasioglossum (Chloralictus) brevibase , p. 1112, L. (C.) consonum , p. 1113, L. (C.) versans , p. 1118 (catalogue); Krombein, 1958: Lasioglossum (Chloralictus) brevibase , p. 230 (catalogue); Mitchell, 1960: Dialictus versans Ƥ3, p. 427 (redescription, synonymy); Krombein, 1967: Lasioglossum (Dialictus) versans , p. 466 (catalogue); Hurd, 1979: Dialictus brevibasis , p. 1964, D. versans , p. 1972 (catalogue); Moure & Hurd, 1987: Dialictus versans , p. 137, D. brevibasis , p. 92 (catalogue); Gibbs, 2010b: Lasioglossum (Dialictus) versans Ƥ3, p. 337 (redescription, key, synonymy).

Diagnosis. Female L. versans can be recognised by the following diagnostic combination: metapostnotal rugae extending less than 2/3 distance to posterior margin, posterior margin distinctly extending beyond adjacent dorsal surface of propodeum; T1 declivitous surface with sparse erect pubescence but no acarinarial fan ( Fig. 9 B); and apical impressed areas of metasomal terga impunctate. They are most similar to L. hemimelas , which has metapostnotal rugae reaching or nearly reaching the posterior margin ( Fig. 133 ).

Male L. versans can be recognised by the following diagnostic combination: metapostnotal rugae reaching 2/3 distance to posterior margin, and penis valve with large dorsal crest.

Range. Nova Scotia, Prince Edward Island, west to Alberta, south to North Carolina. USA: CO, CT, IL, MA, MD, ME, MI, MN, NC, NH, NY, PA, SD, TN, VA, VT, WI. CANADA: AB, MB, NB, NS, ON, PE, SK.

DNA Barcode. Available. Multiple sequences.

Comments. Common.

To maintain stable usage of the name, the specimen indicated above is designated as the lectotype. 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.

Figures

FIGURE 9. Declivitous surface of T 1 with acarinarial fan (A) present, (B) absent. (From Gibbs 2010 b).

FIGURE 133. Lasioglossum hemimelas (Cockerell) female, dorsal view of mesosoma.