Bossert, S. and Pauly, A. 2019.

Two new species of Pseudapis Kirby, 1900 (Hymenoptera: Halictidae: Nomiinae) from Africa

. Zootaxa. 4608, 3 (May 2019), 517–530. DOI:https://doi.org/10.11646/zootaxa.4608.3.6.