Roig-Alsina, A. 2008. “A Revision of the South American Bee Genus Leptometriella Roig-Alsina (Hymenoptera, Apidae, Emphorini)”. Zootaxa 1688 (1). Auckland, New Zealand:20–36. https://doi.org/10.11646/zootaxa.1688.1.2.