Kuhlmann, M., Gess, F. W., Koch, F., & Gess, S. K. (2011). Southern African osmiine bees: taxonomic notes, two new species, a key to Wainia, and biological observations (Hymenoptera: Anthophila: Megachilidae). Zootaxa, 3108(1), 1–24. https://doi.org/10.11646/zootaxa.3108.1.1