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Species Diadasia bituberculata

Diadasia bituberculata  - Diadasia bituberculata - female Bee attacked by whirligig mites - Diadasia bituberculata Diadasia bituberculata - female Aggregation of ground-nesting bees - Diadasia bituberculata bumble bee, I think - Diadasia bituberculata Burrowing Bees? - Diadasia bituberculata SBBG-SCL-TIC_000883 - Diadasia bituberculata bee in morning glory - Diadasia bituberculata
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 (Apoidea (clade Anthophila) - Bees)
Family Apidae (Cuckoo, Carpenter, Digger, Bumble, and Honey Bees)
Subfamily Apinae (Honey, Bumble, Longhorn, Orchid, and Digger Bees)
Tribe Emphorini (Chimney or Turret Bees)
Genus Diadasia
No Taxon (Subgenus Coquillettapis)
Species bituberculata (Diadasia bituberculata)
Explanation of Names
Author: Cresson, 1878
Range
Primarily California, extending into Oregon, Nevada, and Baja California. Discover Life Map.
Food
Pollen from native Calystegia and introduced Convolvulus. The Hosts section on its Discover Life species page lists known associations based on specimen records and images.
Internet References
The Southwestern Naturalist. The function of burrow turrets in a gregariously nesting bee.