Asenjo, A., and C. S. Ribeiro-Costa. “Two New Species of the Neotropical Genus Philothalpus Kraatz from Peru (Coleoptera, Staphylinidae, Xanthopygina)”. Zootaxa, vol. 2286, no. 1, Nov. 2009, pp. 49–57, doi:10.11646/zootaxa.2286.1.3.