Diandrena cyanosoma Cockerell, 1916:49, ♂♀. Type ♀, Claremont, California (leg. Baker). - As Andrena cyanosoma: - Linsley & MacSwain, 1961Linsley, E.G. & J.W. MacSwain 1961. New Diandrena associated with Oenothera and notes concerning other species. The Pan-Pacific Entomologist 37 (1):31-41. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution); Esperanza de Pedro, 2021Esperanza de Pedro, D. 2021. . :. (distribution); Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution).
Andrena austrocalifornica Viereck, 1916:587, ♀. Holotype ♀, Southern California (The Academy of Natural Sciences of Philadelphia, No. 4,020, leg. H. K. Morrison). Synonymized with Andrena cyanosoma (Cockerell, 1916) by Linsley & MacSwain, 1961Linsley, E.G. & J.W. MacSwain 1961. New Diandrena associated with Oenothera and notes concerning other species. The Pan-Pacific Entomologist 37 (1):31-41.:36. - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1790 ( listed as synonym of Andrena cyanosoma (Cockerell, 1916)).