Grossi, P. C., and E. J. Grossi. “A New Species of Brachysiderus Waterhouse, 1881 (Coleoptera: Scarabaeidae: Dynastinae) from Maranhao State, Brazil”. Zootaxa, vol. 1054, no. 1, Sept. 2005, pp. 25–29, doi:10.11646/zootaxa.1054.1.3.