Sobral, R., de Morais, J.W. & Grossi, P.C. (2019)

A new species of Colacus Ohaus, 1910 (Coleoptera: Scarabaeidae: Dynastinae) from the Mata Seca biotope of Brazil, and notes on Colacus morio Ohaus, 1910

. Zootaxa, 4695 (2), 159–167.