| Authors(s) | Lescure, J., and J. Fretey. |
| Year | 1975 |
| Title | Etude taxinomique de Phrynops (Batrachemys) nasutus (Schweigger) (Testudinata, Chelidae). Bull. Mus. Natn. Hist. Nat., Paris (337): 1317-1328. |
| Authors(s) | Lescure, J., and J. Fretey. |
| Year | 1975 |
| Title | Etude taxinomique de Phrynops (Batrachemys) nasutus (Schweigger) (Testudinata, Chelidae). Bull. Mus. Natn. Hist. Nat., Paris (337): 1317-1328. |