Ramos, Kelli S., and Gabriel A.r. Melo. 2006. “A New Species of Protandrena Cockerell from Brazil (Hymenoptera, Apidae, Andreninae)*”. Zootaxa 1330 (1). Auckland, New Zealand:43–50. https://doi.org/10.11646/zootaxa.1330.1.3.