Schartl, Manfred & J.H. Schröder. 1988. "A new species of the genus Xiphophorus Heckel 1848, endemic to northern Coahuila, Mexico (Pisces: Poeciliidae)". Senckenbergiana biologica. 68(4-6):311-321 (ffm00062) (streszczenie)
Schartl, Manfred & M.K. Meyer, B. Wilde. 2006. "Description of Priapella chamulae sp. n. - a new poeciliid fish from the upper río Grijalva system, Tabasco, Mexico (Teleostei: Cyprinodontiformes: Poeciliidae)". Zoologische Abhandlungen. 55:59-67 (ffm00044) (streszczenie)