Timmermann, K. and Kuhlmann, M. 2009. Taxonomic revision of the African bee subgenera Patellapis, Chaetalictus and Lomatalictus (Hymenoptera: Halictidae, genus Patellapis Friese 1909). Zootaxa. 2099, 1 (May 2009), 1–188. DOI:https://doi.org/10.11646/zootaxa.2099.1.1.