Lasioglossum (Dialictus) sheffieldi Gibbs

Lasioglossum (Dialictus) sheffieldi Gibbs Lasioglossum (Dialictus) sheffieldi Gibbs, 2010 b: 302. Ƥ 3. Holotype. Ƥ CANADA, Nova Scotia, Kings Co., Avonport, N 45.1198 W064.2730, 18.vii. 2002 (C. Sheffield); [PCYU]. Diagnosis. Female L. sheffieldi can be recognised by the following diagnostic combina...

Full description

Bibliographic Details
Main Author: Gibbs, Jason
Format: Other/Unknown Material
Language:unknown
Published: 2011
Subjects:
Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Lasioglossum
Lasioglossum sheffieldi
Canada
Sheffield
Newfoundland
Online Access:https://zenodo.org/record/5699454
https://doi.org/10.5281/zenodo.5699454
Description
Summary:Lasioglossum (Dialictus) sheffieldi Gibbs Lasioglossum (Dialictus) sheffieldi Gibbs, 2010 b: 302. Ƥ 3. Holotype. Ƥ CANADA, Nova Scotia, Kings Co., Avonport, N 45.1198 W064.2730, 18.vii. 2002 (C. Sheffield); [PCYU]. Diagnosis. Female L. sheffieldi can be recognised by the following diagnostic combination: head moderately long (length/width ratio = 1.00– 1.01); mesoscutum tessellate, punctures dense except medially (Fig. 13 B); mesepisternum shining, irregularly punctate; metapostnotum with strongly anastomosing rugae; T 1 acarinarial fan complete dorsally; metasomal terga polished with faint metallic reflections; and T 3 –T 4 with moderately dense tomentum. They are similar to L. perpunctatum, which has a wider head (length/width ratio = 0.95–0.96) and dense mesoscutal punctures medially (Fig. 13 A). Male L. sheffieldi can be recognised by the following diagnostic combination: head long (length/width ratio = 1.06– 1.08), dense facial tomentum limited to lower paraocular area, flagellomeres relatively short (length/width ratio = 1.20– 1.62), mesoscutal punctures sparse between parapsidal lines (i= 1–3 d), mesepisternum with distinct punctures, tegula with weak posterior angle, and apical impressed areas of metasomal terga pale translucent yellow, distinctly punctate. They are similar to L. perpunctatum, which has a wider head (length/width ratio = 1.00– 1.03). Range. Coastal dunes of Nova Scotia, southern Newfoundland, west to Quebec. Disjunct individuals from western coast of Lake Michigan and Manitoba dunes. USA: WI. CANADA: MB, NB, NF, NS, PQ. DNA Barcode. Available. Multiple sequences. Comments. Locally common. Lasioglossum sheffieldi is a sand dune specialist. Published as part of Gibbs, Jason, 2011, Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini), pp. 1-216 in Zootaxa 3073 on pages 176-177, DOI:10.5281/zenodo.1049595

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