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Vivallo, F. and 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 (May 2012), 1–16. DOI:https://doi.org/10.11646/zootaxa.3298.1.1.