Diadasia

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Hexapoda
Classis: Insecta
Cladus: Dicondylia
Subclassis: Pterygota
Cladus: Metapterygota
Infraclassis: Neoptera
Cladus: Eumetabola
Cladus: Endopterygota
Superordo: Hymenopterida
Ordo: Hymenoptera
Subordo: Apocrita
Superfamilia: Apoidea

Familia: Apidae
Subfamilia: Apinae
Tribus: Emphorini
Genus: Diadasia
Species: D. afflicta – D. afflictula – D. albovestita – D. andina – D. angusticeps – D. australis – D. baeri – D. baraderensis – D. bituberculata – D. bosqi – D. chilensis – D. consociata – D. diminuta – D. distinguenda – D. enavata – D. friesei – D. hirta – D. knabiana – D. laticauda – D. lutzi – D. lynchii – D. martialis – D. megamorpha – D. mendozana – D. mexicana – D. nigrifrons – D. nitidifrons – D. ochracea – D. olivacea – D. opuntiae – D. palmarum – D. patagonica – D. pereyrae – D. piercei – D. rinconis – D. ruficruris – D. sphaeralcearum – D. toluca – D. tropicalis – D. tuberculifrons – D. vallicola – D. willineri
Name

Diadasia Patton, 1879

Type species: Melissodes enavata Cresson, 1872 by original designation.
Synonyms

Dasiapis Cockerell, 1903
Leptometria Holmberg, 1903

References

Patton, W.H. 1879: Generic arrangement of the bees allied to Melissodes and Anthophora. Bulletin of the United States Geological and Geographical Survey of the Territories. 5: 471–479.
Cockerell, T.D.A. 1905: Diadasia Patton; a genus of bees. American Naturalist. 39(466): 741–745.
Linsley, E.G. & MacSwain, J.W. 1958: The significance of floral constancy among bees of the genus Diadasia (Hymenoptera, Anthophoridae). Evolution, 12(2): 219–223.

Diadasia is a genus of bees in family Apidae. Species of Diadasia are oligolectic, specialized on a relatively small number of plant species. Their host plants include asters, bindweeds, cacti, mallows, and willowherbs, although mallows are the most common and likely ancestral host plant for the whole genus. Its tribe is Emphorini.[1] In the Sonoran Desert, Diadasia rinconis is considered the "cactus bee" as it feeds almost exclusively on a number of Sonoran Desert cactus species, its life cycle revolving around the flowering of the native species of cacti.[2]
Species

These 42 species belong to the genus Diadasia.[3][4][5]

Diadasia afflicta (Cresson, 1878)
Diadasia afflictula Cockerell, 1910
Diadasia albovestita Provancher, 1896
Diadasia andina (Holmberg, 1903)
Diadasia angusticeps Timberlake, 1939
Diadasia australis (Cresson, 1878)
Diadasia baeri (Vachal, 1904)
Diadasia baraderensis (Holmberg, 1903)
Diadasia bituberculata (Cresson, 1878)
Diadasia bosqi (Moure, 1947)
Diadasia chilensis (Spinola, 1851)
Diadasia consociata Timberlake, 1939
Diadasia diminuta (Cresson, 1878) (globe mallow bee)
Diadasia distinguenda (Spinola, 1851)
Diadasia enavata (Cresson, 1872) (sunflower chimney bee)
Diadasia friesei Cockerell, 1898
Diadasia hirta (Jörgensen, 1912)
Diadasia knabiana Cockerell, 1917
Diadasia laticauda Cockerell, 1905
Diadasia lutzi Cockerell, 1924
Diadasia lynchii (Brèthes, 1910)
Diadasia martialis Timberlake, 1940
Diadasia megamorpha Cockerell, 1898
Diadasia mendozana (Brèthes, 1910)
Diadasia mexicana Timberlake, 1956
Diadasia nigrifrons (Cresson, 1878)
Diadasia nitidifrons Cockerell, 1905
Diadasia ochracea (Cockerell, 1903) (ochraceous chimney bee)
Diadasia olivacea (Cresson, 1878)
Diadasia opuntiae Cockerell, 1901
Diadasia palmarum Timberlake, 1940
Diadasia patagonica (Brèthes, 1910)
Diadasia pereyrae (Holmberg, 1903)
Diadasia piercei Cockerell, 1911
Diadasia rinconis Cockerell, 1897
Diadasia ruficruris (Vachal, 1909)
Diadasia sphaeralcearum Cockerell, 1905
Diadasia toluca (Cresson, 1878)
Diadasia tropicalis (Cockerell, 1918)
Diadasia tuberculifrons Timberlake, 1939
Diadasia vallicola Timberlake, 1940
Diadasia willineri (Moure, 1947)

References
Wikispecies has information related to Diadasia.

Sipes, Sedonia D.; Tepedino, Vincent J. (2005). "Pollen-host specificity and evolutionary patterns of host switching in a clade of specialist bees (Apoidea: Diadasia)". Biological Journal of the Linnean Society. 86 (4): 487–505. doi:10.1111/j.1095-8312.2005.00544.x.
https://www.desertmuseum.org/books/nhsd_bees.php
"Diadasia Report". Integrated Taxonomic Information System. Retrieved 2018-03-04.
"Diadasia Overview". Encyclopedia of Life. Retrieved 2018-03-04.
"Browse Diadasia". Catalogue of Life. Retrieved 2018-03-04.