Moctezuma, V., and G. Halffter. “Taxonomic Revision of the Phanaeus Endymion Species Group (Coleoptera: Scarabaeidae), With the Descriptions of Five New Species”. European Journal of Taxonomy, vol. 747, no. 1, Apr. 2021, pp. 1-71, doi:10.5852/ejt.2021.747.1333.