Droege, Sam, Molly G. Rightmyer, Cory S. Sheffield, and Seán G. Brady. 2010. “New Synonymies in the Bee Genus Nomada From North America (Hymenoptera: Apidae)”. Zootaxa 2661 (1). Auckland, New Zealand:1–32. https://doi.org/10.11646/zootaxa.2661.1.1.