Vivallo, F., & Zanella, F. C. V. (2012). A new species of Centris (Paracentris) Cameron, 1903 from northeastern Brazil, with a key for the Centris species of the Caatinga region (Hymenoptera: Apidae). Zootaxa, 3298(1), 1–16. https://doi.org/10.11646/zootaxa.3298.1.1