Centris (Paracentris) nordestina Vivallo & Zanella 2012

Vivallo & Zanella 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, 3 May 2012: 1-16