After Williams, G. S., 1999-2000
<==o †Ptychodontidae Jaekel, 1898 |-- †Hemiptychodus Cret. |-- †Heteroptychodus Yabe & Obata, 1930; Cret. |-- †Hylaeobatis ornatus (Woodward, 1889) Woodward, 1916; L. Cret. Eu. `--o †Ptychodus Agassiz, 1835; L.Cret. NA. Eu. As. Af. Aust., U.Cret. SA. |-- †P. anonymus Williston, 1900 |-- †P. bellucii Bonarelli, 1899 |-- †P. chappelli Reinhart, 1951 |-- †P. concentricus |-- †P. connellyi McLeod & Slaughter, 1980 |-- †P. cyclodontis Mutter, Iturralde-Vinent & Carmona, 2005 |-- †P. decurrens (Agassiz, 1848) |-- †P. latissimus (Agassiz, 1835) |-- †P. mammillaris (Agassiz, 1835) |-- †P. mantelli |-- †P. marginalis |-- †P. martini Williston, 1898 |-- †P. mortoni Agassiz, 1843 |-- †P. occidentalis (Leidy, 1868) |-- †P. oweni |-- †P. polygyrus (Agassiz, 1835) |-- †P. rugosus (Dixon, 1850) |-- †P. sp. `-- †P. whipplei (Marcov, 1858)
Reference(s):
- Brito, P. M. & Janvier, P., 2002: A ptychodontid (Chondrichthyes, Elasmobranchii) from the Upper Cretaceous of South America.
–Geodiversitas: Vol. 24, #4, pp. 785-790 - Mutter, R. J., Iturralde-Vinent, M. & Carmona, J. F., 2005: The first Mesozoic Caribbean shark is from the Turonian of Cuba: Ptychodus cyclodontis sp. nov. (?Neoselachii).
–Journal of Vertebrate Paleontology: Vol. 25, #4, pp. 976-978 - Williams, G. S., 1999-2000: A Listing of Fossil Sharks and Rays of the World.
–iNet: Gainesville's Creek Fossils: Euselachii: http://www.afn.org/~afn02877/eusel.html