Lasioglossum (Dialictus) versatum (Robertson)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216: 206-207

publication ID

http://doi.org/ 10.5281/zenodo.1049595

publication LSID

lsid:zoobank.org:pub:B5AF6DF4-D3A7-4942-A94F-CC051D8074CF

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scientific name

Lasioglossum (Dialictus) versatum (Robertson)
status

 

Lasioglossum (Dialictus) versatum (Robertson)  

Chloralictus versatus Robertson, 1902 b: 249   . Ƥ 3.

Lectotype. Ƥ USA, Illinois, Macoupin Co., Carlinville, 8.iv. 1886 (C. Robertson); [ INHS: 543] by W. E. LaBerge (in Webb

1980). Examined.

Halictus subconnexus rohweri Ellis, 1915: 292   . Ƥ.

Lectotype. Ƥ USA, Virginia, Fairfax Co., Newington, 30.v. 1911 (S.A. Rohwer) [ UCMC] designated herein. Examined. Halictus (Chloralictus) apertus Sandhouse, 1924: 35   . 3.

Holotype. 3 USA, Virginia, Chain Bridge, 14.vi., (S.A. Rohwer); [ NMNH: 26437]. Examined. Halictus (Chloralictus) genuinus Sandhouse, 1924: 36   . 3.

Holotype. 3 USA, Virginia, Chain Bridge, 14.vi., (S.A. Rohwer); [ NMNH: 26438]. Examined. Halictus (Chloralictus) geminus Bohart, 1941: 138   . Lapsus calami   .

Taxonomy. Viereck, 1916: Halictus (Chloralictus) versatus   , p. 707 (key); Michener, 1951: Lasioglossum (Chloralictus) apertum   , p. 1112, L. (C.) genuinum   , p. 1113, L. (C.) rohweri   , p. 1117, L. (C.) versatum   , p. 1118 (catalogue); Mitchell, 1960: Dialictus apertus   3, p. 380, D. genuinus   3, p. 394, D. laevissimum   3 (misdet.), p. 401, L. rohweri   Ƥ, p. 418 (redescription); Knerer and Atwood, 1962 a: D. rohweri   3, p. 1230 (description); Krombein, 1967: Lasioglossum (Dialictus) rohweri   , p. 466, L. (D.) versatum   , p. 466, (catalogue); Dialictus apertus   , p. 1964, D. genuinus   , p. 1966, D. rohweri   , p. 1971, D. versatus   , p. 1972 (catalogue); Moure & Hurd, 1987: Dialictus apertus   , p. 89, D. genuinus   , p. 101, D. rohweri   , p. 127, D. versatus   , p. 137 (catalogue); Pesenko et al., 2000: Evylaeus rohweri   , p. 52, E. versatus   , p. 54 (review); Gibbs, 2010 b: Lasioglossum (Dialictus) versatum   Ƥ 3, p. 342 (redescription, key, synonymy).

Diagnosis. Female L. versatum   can be recognised by the following diagnostic combination: size large (5.1–6.8 mm); head wide (length/width ratio = 0.89–0.94); mandible with dorsal margin straight; clypeus 1 / 3 – 1 / 2 below suborbital line; mesoscutum tessellate, punctures moderately sparse punctures between parapsidal lines (i= 1.5–3 d), centre appearing flat; mesepisternum rugulose; tegula usually reddish brown; protrochanter unmodified; metapostnotum completely rugosocarinulate; T 1 acarinarial fan with wide dorsal opening; and metasomal terga brown, apical impressed areas densely punctate. They are most similar to L. callidum   , which has protrochanter very wide ( Fig. 18 View FIGURE 18 B), mandible strongly curved at midlength of dorsal margin ( Fig. 19 View FIGURE 19 B), and clypeus not much protruding below suborbital line.

Male L. versatum   are similar to females but can be further recognised by the following combination: head round (length/width ratio = 1.00– 1.01); face with dense tomentum; flagellomeres moderately long (length/width ratio = 1.43– 1.60), brownish yellow ventrally; metabasitarsus four times as long as broad; and apical impressed areas of metasomal terga punctate. Similar species include L. dubitatum   , L. callidum   , L. laevissimum   and L. mitchelli   . Male L. dubitatum   have a short and wide metabasitarsus approximately three times as long as broad. Male L. callidum   have wide protrochanter. Male L. laevissimum   and L. mitchelli   have apical impressed areas of metasomal terga impunctate.

Range. Quebec, south to North Carolina, west to Manitoba, Kansas (Fig. 231). USA: AR, CT, DE, IL, IN, KS, MA, MD, ME, MO, NC, NY, PA, TN, VA, WI. CANADA: MB, ON, PQ.

DNA Barcode. Available. Multiple sequences.

Comments. Common.

The lectotype of L. versatum   does not match the species that was most commonly referred to by this name in the literature prior to Gibbs (2010 b). Mitchell (1960) used this name (as Dialictus versatus   ) to refer to what is here called L. callidum   . The behavioural study of L. versatum   by Michener (1966) apparently was at least in part a study of L. trigeminum   (see above).

Despite the common use of the specific epithet rohweri   in earlier literature, the location of the type series of Halictus subconnexus rohweri   was not clear ( Moure & Hurd 1987; Gibbs 2010 b). Ellis (1915) based her original description on two specimens from Newington, Virginia. A specimen with matching locality information to that given in the description, with a handwritten label by Ellis reading “ Halictus subconnexus rohweri Ellis   ”, was found at UCMC. It is here designated as the lectotype to fix the commonly used epithet rohweri   to a physical specimen and thus clarify the application of the name. A lectotype label has been affixed to the specimen. The identity of the lectotype agrees with common usage of the name.

INHS

Illinois Natural History Survey

UCMC

University of Colorado Museum

NMNH

Smithsonian Institution, National Museum of Natural History

DNA

Department of Natural Resources, Environment, The Arts and Sport

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Halictidae

Genus

Lasioglossum

Loc

Lasioglossum (Dialictus) versatum (Robertson)

Gibbs, Jason 2011
2011
Loc

Halictus subconnexus rohweri

Ellis 1915: 292
1915
Loc

Chloralictus versatus

Robertson 1902: 249
1902