Andrena (Ptilandrena), Robertson

Portman, Zachary M., Gardner, Joel, Lane, Ian G., Gerjets, Nicole, Petersen, Jessica D., Ascher, John S., Arduser, Mike, Evans, Elaine C., Boyd, Crystal, Thomson, Robin & Cariveau, Daniel P., 2023, A checklist of the bees (Hymenoptera: Apoidea) of Minnesota, Zootaxa 5304 (1), pp. 1-95 : 19

Subgenus Ptilandrena Robertson

Taxonomy: LaBerge & Ribble (1975) [as Euandrena ]; LaBerge (1977) [as Euandrena ]; LaBerge (1986). Recently, Pisanty et al. (2022) moved all Nearctic taxa previously in Euandrena to Ptilandrena . Four species ( A. algida , A. geranii , A. nigrihirta , and A. polemonii ) were formerly included in Euandrena .