Ayala, Ricardo, and Michael S. Engel. “A New Species of Ptiloglossa from Mexico, With New Records of Ptiloglossa Cyaniventris from Panama and Costa Rica (Hymenoptera: Colletidae)”. Journal of Melittology, no. 35 (June 30, 2014): 1–13. Accessed January 13, 2026. https://journals.ku.edu/melittology/article/view/4759.