Portman, Z.M., Neff, J.L. and Griswold, T. 2016. Taxonomic revision of Perdita subgenus Heteroperdita Timberlake (Hymenoptera: Andrenidae), with descriptions of two ant-like males. Zootaxa. 4214, 1 (Dec. 2016), 1–97. DOI:https://doi.org/10.11646/zootaxa.4214.1.1.