Lasioglossum (Dialictus) smilacinae (Robertson)

Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), Zootaxa 3073, pp. 1-216: 180-181

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-A7A5-FF03-0A97-8CE5FEE800D7

treatment provided by

Plazi

scientific name

Lasioglossum (Dialictus) smilacinae (Robertson)
status

 

Lasioglossum (Dialictus) smilacinae (Robertson)  

Halictus smilacinae Robertson, 1897: 322   . Ƥ.

Lectotype. Ƥ USA, Illinois, Macoupin Co., Carlinville, 21.iii. 1894 (C. Robertson); [ INHS: 16247] by W. E. LaBerge (in Webb

1980). Examined.

Halictus zophops Ellis, 1914: 97   . Ƥ. [new synonymy]

Holotype. Ƥ USA, Colorado, Boulder, 13.iv. 1913, (M.D. Ellis); [ UCMC]. Examined. Dialictus philanthanus Mitchell, 1960: 441   . 3. [new synonymy]

Holotype. 3 USA, North Carolina, Mecklenburg Co.   , 3.vi. 1957 (C.F. Smith); [ NCSU]. Examined.

Taxonomy. Robertson, 1902 b: Chloralictus smilacinae   , p. 249 (key); Michener, 1951: Lasioglossum (Chloralictus) smilacinae   , p. 1118; L. (C.) zophops   , p. 1118 (catalogue); Mitchell, 1960: Dialictus laevissimus   , p. (misdet., incorrect syn.) Krombein, 1967: Lasioglossum (Dialictus) philanthanum   , p. 465 (catalogue); Hurd, 1979: Dialictus zophops   , p. 1973 (catalogue); Moure & Hurd, 1987: Dialictus philanthanus   , p. 122, D. zophops   , p. 142 (catalogue); Gibbs, 2010 b: Lasioglossum (Dialictus) laevissimum   , p. 170 (misdet.); L. (D.) zophops   Ƥ 3, p. 368 (redescription, key).

Diagnosis. Female L. smilacinae   can be recognised by the following diagnostic combination: size large (6.1–7.1 mm); head wide (length/width ratio = 0.92–0.94); mesoscutum imbricate-tessellate, punctures sparse punctures between parapsidal lines; mesepisternum rugulose; propodeal oblique carina well-developed; T 1 acarinarial fan without dorsal opening; metasomal terga brown, apical impressed areas distinctly punctate; and T 2 with sparse apical fringes visible in dorsal view. Similar species include L. gotham   . L. laevissimum   and L. versatum   . Female L. gotham   have more polished integument due to weaker microsculpture, obscure mesepisternal punctures, and T 1 acarinarial fan with narrow dorsal opening. Female L. laevissimum   have apical halves of metasomal terga impunctate and T 2 lacks apical fringes visible in dorsal view. Female L. versatum   have T 1 acarinarial fan with wide dorsal opening.

Male L. smilacinae   are similar to females and may be further distinguished by head longer (length/width ratio = 0.95– 0.99), mesepisternal punctures distinct, mesoscutum relatively polished, dorsolateral angle of pronotum obtuse, and apical impressed margins of metasomal terga with widely scattered punctures. They are most similar to L. gotham   , L. obscurum   and L. wheeleri   . Male L. gotham   have a narrow band of relatively dense punctation on base of apical impressed areas of metasomal terga. Male L. obscurum   have head longer (length/width ratio = 1.02–1.05) and apical impressed areas of metasomal terga impunctate. Male L. wheeleri   have dorsolateral angle of pronotum acute and apical impressed areas of metasomal terga impunctate.

Range. Southern Ontario, south to Maryland and west to Colorado. USA: CO, CT, GA, IA, IL, KS, MA, MD, ME, MI, MO, NC, NJ, NY, PA, SC, VA, WI, WV. CANADA: ON, PQ.

DNA Barcode. Available. Multiple sequences.

Comments. Common.

Lasioglossum smilacinae   was previously considered a junior synonym of L. laevissimum   . The lectotype was examined in 2007 and it was thought that the synonymy, first made by Mitchell (1960), was valid. Subsequently, L. zophops   was reported to occur in eastern North America ( Gibbs 2010 b). The lectotype was re-examined in 2011 and it is now evident that the synonymy was incorrect and L. smilacinae   is the valid name for the species previously reported as L. zophops   . The new synonymy with D. philanthanus   was made possible by comparative study to male L. smilacinae   and the related species L. gotham   .

INHS

Illinois Natural History Survey

UCMC

University of Colorado Museum

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) smilacinae (Robertson)

Gibbs, Jason 2011
2011
Loc

Halictus smilacinae

Robertson 1897: 322
1897