Maldaner, Maria E., Rafael V. Nunes, and Fernando Z. Vaz-De-Mello. 2015. “Taxonomic Revision of the Dichotomius speciosus (Waterhouse, 1891) Species Group (Coleoptera: Scarabaeidae: Scarabaeinae)”. Zootaxa 3986 (5). Auckland, New Zealand:549–560. https://doi.org/10.11646/zootaxa.3986.5.2.