After Williams, G. S., 1999-2000 and Underwood, 2002
<==o †Synechodontiformes Duffin & Ward, 1993 |?- †Mucrovenator minimus Cuny, Rieppel & Sander, 2001 |--o †Orthacodidae Glickman, 1957 | `--o Sphenodus [Eychlaodus, Orthacodus] L. Jur. Eu.; U. Jur. Eu.; U. Cret Eu.; Pal. Eu. | |-- †S. alpinus (Guembel, 1861) | |-- †S. dubrisiensis | |-- †S. helviticus Beaumont, 1960 | |-- †S. longidens Agassiz, 1843 | |-- †S. lundgreni (Davis, 1890) | |-- †S. nitidus Wagner, 1863 | |-- †S. stschurowskii Kiprijanoff, 1880 | |-- †S. sp. | |-- †S. tithunius Gemmelaro, 1868 | `-- †S. venulosus (Chabakov & Zonov, 1935) `--o †Palaeospinacidae Regan, 1906 |--o †Paraorthacodus U. Jur. NA. Eu. U. Cret. NA. Eu. SA.? NZ. Pal. NA. NZ. Eoc. NA. | |-- †P. andersoni (Case, 1978) | |-- †P. clarkii (Eastman, 1901) | |-- †P. conicus (Davis, 1890) | |-- †P. eocaenus (Leriche, 1902) | |-- †P. jurensis (Schweizer, 1964) | |-- †P. kruckowi (Theis, 1983) | |-- †P. nerviensis (Leriche, 1929) | |-- †P. patagonicus (Ameghino, 1893) | |-- †P. recurvus (Trautschold, 1877) | |-- †P. sp. cf. P. recurvus | |-- †P. sp. | |-- †P. sulcatus (Davis, 1888) | `-- †P. validus (Chapman, 1918) |--o †Synechodus Woodward, 1888 [Paleospinax] L. Jur. Eu. U. Jur. Eu. L. Cret. Eu. U. Cret. NA. Eu. CAs. As. Aust. Pal. Eu. | |-- †S. dispar (Ruess, 1845) | |-- †S. sp. cf. S. dispar | |-- †S. dubrisiensis (Mackie, 1863) [Hybodus dubrisiensis Mackie, 1863] [type] | |-- †S. enniskilleni (Egerton, 1872) | |-- †S. faxensis (Davis, 1890) | |-- †S. hesbayensis Casier, 1943 | |-- †S. lerichei Herman, 1977 | |-- †S. nitidus Woodward, 1910 | |-- †S. occultidens Duffin & Ward, 1993 | |-- †S. pinnai (Duffin, 1989) | |-- †S. plicatus Underwood, 2002, U. Jur. WEu. | |-- †S. riegrafi (Theis, 1983) | |-- †S. sp. | |-- †S. striatus Case, 1978 | |-- †S. tenuis (Woodward, 1889) | `-- †S. turneri `--o †Welcommia Jur. Eu. L. Cret, Eu. |-- †W. bodeuri Capetta |-- †W. politus Thies `-- †W. terencei
Reference(s):
- Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - Carroll, R. L., 1988: Appendix. 594-648
in Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - Cuny, G., Rieppel, O. & Sander, P. M., 2001: The shark fauna from the Middle Triassic (Anisian) of North-Western Nevada.
–Zoological Journal of the Linnean Society: Vol. 133, #3, pp. 285-301 - Underwood, C. J., 2002: Sharks, Rays and a Chimaeroid from the Kimmeridgian (Late Jurassic) of Ringstead, Southern England.
–Palaeontology: Vol. 45, #2, pp. 297-325 - 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