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ligatus or poeyi, subgenus Odontalictus

Bee - Halictus - female Sweat Bee? - Halictus Big Headed - Halictus Halictus ligatus or poeyi - Halictus - female Pale-striped bee - Halictus Halictus (sweat) bee? - Halictus Halictus? - Halictus - female solitary bee - Halictus - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
No Taxon (Anthophila (Apoidea) - Bees)
Family Halictidae (Sweat, Furrow, Nomiine, and Shortface Bees)
Subfamily Halictinae (Sweat and Furrow Bees)
Tribe Halictini
Genus Halictus (Furrow Bees)
No Taxon (Subgenus Halictus sensu lato)
No Taxon ligatus or poeyi, subgenus Odontalictus
Identification
Packer, L. (1998) determined these to be two separate species (Previously only H. ligatus was considered valid). They are best separated based on range OR DNA sequence data in areas of sympatry.
Remarks
Known to be a species complex, likely to be split further in the future. The most distinctive "cryptic" forms are Mexican.
See Also
Halictus poeyi Lepeletier, 1841
Print References
Danforth, B. N., Mitchell, P. L., & Packer, L. (1998). Mitochondrial DNA differentiation between two cryptic Halictus (Hymenoptera: Halictidae) species. Annals of the Entomological Society of America, 91(4), 387-391. (Full Text)