Rightmyer, M.G., Kono, Y., Kohn, J.R. and 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 (Oct. 2014), 48–56. DOI:https://doi.org/10.11646/zootaxa.3872.1.4.