Rightmyer, M.G., Kono, Y., Kohn, J.R. & Hung, K.-L.J. (2014)

A new species of Triepeolus (Hymenoptera: Apidae), with comments on
T. utahensis (Cockerell) and T. melanarius Rightmyer

. Zootaxa, 3872 (1), 48–56.