Lasioglossum (Dialictus) imitatum (Smith)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216: 119-120

publication ID

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

publication LSID

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

persistent identifier

http://treatment.plazi.org/id/9A5987DB-A760-FFC0-0A97-8DB9FE40002C

treatment provided by

Plazi

scientific name

Lasioglossum (Dialictus) imitatum (Smith)
status

 

Lasioglossum (Dialictus) imitatum (Smith)  

Halictus imitatus Smith, 1853: 71   . 3.

Holotype. 3 North America [ BMNH: B.M. type 17a 999]. Examined. Halictus inconspicuus Smith, 1853: 73   . Ƥ.

Holotype. Ƥ North America [ BMNH: B.M. type 17a 1007]. Examined. Halictus stultus Cresson, 1872: 254   . Ƥ

Lectotype. Ƥ USA, Texas, Bosque Co., (G.W. Belfrage); [ ANSP: 2113] designated herein. Examined. Chloralictus sparsus Robertson, 1902: 249   . Ƥ 3.

Lectotype. Ƥ USA, Illinois, Macoupin Co., Carlinville, 2.vi. 1886 (C. Robertson); [ INHS: 1293] by W. E. LaBerge (in

Webb 1980). Examined.

Halictus hortensis Lovell, 1905 a: 39   . Ƥ.

Lectotype. Ƥ USA, Maine, Waldoboro, on “cultivated blackberry”, 19.vi, (Lovell); [ NMNH: 71568] designated herein.

Examined.

Halictus (Chloralictus) insolitus Sandhouse, 1924: 41   . 3

Holotype. 3 USA, Iowa, Vinton, 23.vi. 1922 [ NMNH: 26446]. Examined. Dialictus lectus Mitchell, 1960: 438   . 3.

Holotype. 3 USA, Georgia, Kennesaw Mt., 1.ix. 1946, [ NCSU]. Examined.

Taxonomy. Cockerell, 1905: Halictus inconspicuus   3, p. 349, H. imitatus   Ƥ, p. 350 (tax. notes); Lovell, 1908: Halictus hortensis   3, p. 39 (description); Viereck, 1916: Halictus (Chloralictus) sparsus   , p. 706 (key); Michener, 1951: Lasioglossum (Chloralictus) imitatum   , p. 1114, L. (C.) inconspicuum   , p. 1114, L. (C.) insolitum   , L. (C.) sparsum   , p. 1027 (catalogue, synonymy); Michener, 1953: Lasioglossum (Chloralictus) sparsum   , p. 1027 (larva); Krombein, 1958: Lasioglossum (Chloralictus) inconspicuum   , p. 230, (catalogue); Mitchell, 1960: Dialictus imitatus   3, p. 400, D. inconspicuus   Ƥ, p. 400 (redescription, key); Knerer and Atwood, 1962 b: D. imitatus   , p. 168 (synonymy); Krombein, 1967: Lasioglossum (Dialictus) imitatum   , p. 464; L. (D.) lectum   , p. 464 (catalogue); Hurd, 1979: Dialictus imitatus   , p. 1967, D. insolitus   , p. 1967, D. lectus   , p. 1968 (catalogue); Moure & Hurd, 1987: Dialictus imitatus   , p. 105, D. insolitus   , p. 109, D. lectus   , p. 110 (catalogue); Pesenko et al., 2000: Evylaeus imitatus   , p. 46 (review); Gibbs, 2010 b: Lasioglossum (Dialictus) imitatum   Ƥ 3, p. 156 (redescription, key, synonymy).

Diagnosis. Female L. imitatum   can be recognised by the distinct coarse hairs on T 3 –T 4 ( Fig. 20 View FIGURE 20. T 3 – T 4 A). They may be further distinguished by size small (3.4 –5.0 mm), gena wider than eye, hypostomal carinae parallel, punctures fine, and sculpturing weak throughout.

Male L. imitatum   can be recognised by the following diagnostic combination: size small (4.2–4.3 mm); head moderately elongate (length/width ratio = 1.00– 1.02); moderately facial tomentum sparse, except on lower paraocular area; mesoscutum weakly imbricate, punctures fine punctures, sparse between parapsidal lines (i= 1.5–2.5 d); hypoepimeral area and lower mesepisternum obscurely punctate; metapostnotum smoothly rounded onto posterior surface; and apical impressed areas of metasomal terga impunctate.

Range. Nova Scotia, south to Florida and west to Alberta, California. USA: AL, AR, AZ, CO, CT, GA, IA, IL, IN, KS, KY, MA, ME, MI, MN, MS, NC, NY, PA, PE, SC, SD, TN, TX, VA, WI, WV. CANADA: MB, NS, ON, PQ, SK.

DNA Barcode. Available. Multiple sequences.

Comments. Common.

Lasioglossum imitatum   is known to form eusocial colonies (Michener & Wille 1961; as L. inconspicuum   ).

The specimen of Halictus stultus   indicated above is designated herein as the lectotype to ensure stability in the application of the name. Some of Cresson’s syntype series include more than one species, which could potentially lead to taxonomic confusion. Likewise, the specimen of Halictus hortensis   indicated above is designated as the lectotype to ensure nomenclatural stability.

ANSP

Academy of Natural Sciences of Philadelphia

INHS

Illinois Natural History Survey

NMNH

Smithsonian Institution, National Museum of Natural History

NCSU

North Carolina State University Insect Museum

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) imitatum (Smith)

Gibbs, Jason 2011
2011
Loc

Halictus (Chloralictus) insolitus

Sandhouse 1924: 41
1924
Loc

Halictus hortensis

Lovell 1905: 39
1905
Loc

Halictus imitatus

Smith 1853: 71
1853