Almeida, L. M., & Santos, P. B. (2014).

Synopsis of Oryssomini Gordon (Coleoptera: Coccinellidae)
from the Neotropical region with new species of Oryssomus Mulsant, Pseudoryssomus Gordon and Gordonoryssomus Almeida & Lima

. Zootaxa, 3846(1), 42–68. https://doi.org/10.11646/zootaxa.3846.1.2