Mack, Anne, and Michael Kuhlmann. “Revision of the Nitidus Species Group of the Bee Genus Scrapter Lepeletier & Serville, 1828 (Hymenoptera: Apoidea)”. European Journal of Taxonomy 912, no. 1 (December 15, 2023): 1–119. Accessed April 24, 2026. https://ejt.sandbox.publicknowledgeproject.org/index.php/ejt/article/view/2373.