BioStor
(specimen not known in GBIF)
 | The relationship of the softshell turtles trionyx ferox ferox and trionyx ferox aspera John W Crenshaw (1955) Copeia : 13-23 |
 | North American Recent soft-shelled turtles (Family Trionychidae) Robert G Webb (1962) Univ. Kansas Publ. Mus. Natur. Hist. 13(10): 429-611 |