Lasioglossum (Dialictus) dreisbachi (Mitchell)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216 : 87

Lasioglossum (Dialictus) dreisbachi (Mitchell)

Dialictus dreisbachi Mitchell, 1960: 391 . Ƥ 3.

Holotype. Ƥ USA, Michigan, Clare Co., 24.v. 1958 (R. & K. Dreisbach); [ NSCU]. Examined.

Taxonomy. Lasioglossum (Dialictus) dreisbachi Krombein, 1967: 463 (catalogue); Hurd, 1979: Dialictus dreisbachi , p. 1966 (catalogue); Moure & Hurd, 1987: Dialictus dreisbachi , p. 99 (catalogue); Gibbs, 2010b: Lasioglossum (Dialictus) dreisbachi Ƥ3, p. 110 (redescription, key).

Diagnosis. Both sexes of L. dreisbachi can be recognised by the unique mesepisternal sculpture with dorsal half coarsely rugose and sharply delimited from ventral half imbricate with obscure punctation ( Fig. 17 B). In other respects this species displays characteristics typical of the L. viridatum species group (see Gibbs 2010b).

Range. Ontario, west to Alberta, Wisconsin and southeast to Maryland. USA: MI, MN, NY, WI. CANADA: AB, ON.

DNA Barcode. Available. Multiple sequences.

Comments. Uncommon.

Figures

FIGURE 17. Mesepisternum (A) without distinct change in sculpture (B) with distinct change in sculpture, indicated by arrow (L. dreisbachi). (From Gibbs 2010 b).