Lasioglossum (Dialictus) sheffieldi Gibbs
- Dataset
- Revision of the metallic Lasioglossum (Dialictus) of eastern North America (Hymenoptera: Halictidae: Halictini)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Hymenoptera
- family
- Halictidae
- genus
- Lasioglossum
- species
- Lasioglossum sheffieldi
diagnosis
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.
discussion
Comments. Locally common. Lasioglossum sheffieldi is a sand dune specialist.
materials_examined
Holotype. Ƥ CANADA, Nova Scotia, Kings Co., Avonport, N 45.1198 W 064.2730, 18. vii. 2002 (C. Sheffield); [PCYU].