After Carroll, 1988, Long 1990 and Williams, 1999-2000
<==o †Ctenacanthidae Dean, 1909 |-- †Amelacanthus Maisey, 1982; U. Dev. NA. Miss. Eu. |--o †Ctenacanthus Agassiz, 1837 [Eunemacanthus, Sphenacanthus] U. Dev. NA. Miss. Eu. | |-- †C. compressus Newberry, 1889 [C. clarki Newberry, 1889; Eunemacanthus] | |-- †C. denticulatus M'Coy, 1855 | |-- †C. elegans (Toumey, 1858) | |-- †C. formosus (Newberry, 1879) | |-- †C. gracilimus | |-- †C. harrisoni St. John & Worthen, 1883 | |-- †C. littoni Newberry, 1889 | |-- †C. major Agassiz, 1837 [=? Cladodus mirabilis] | |-- †C. nodocostatus Hossakof & Bryant, 1918 | |-- †C. pellensis St. John & Worthen, 1883 | |-- †C. randalli Newberry, 1889 | |-- †C. sp. | `-- †C. wrightii Newberry, 1888 |-- †Cratoselache pruvosti Woodward, 1924 Miss. Eu. |?- †Dabasacanthus inskasi Zangerl, 1979 Penn. NA. |-- †Goodrichthys eskdalensis (Myo-Thomas, 1936a) [Moythomasina, Goodrichia] Miss. Eu. |--o †Sphenacanthus Agassiz, 1837, Miss. Eu. | |-- †S. serrulatus Agassiz, 1837 | |-- †S. hybodoides (Egerton, 1853) | |-- †S. marshi (Newberry, 1873) | |-- †S. aequistriatus (Davis, 1879) | `-- †S. fifensis Traquair, 1901 |?- †Suraudalus Levi, 1989, U. Perm. Aust. |?- †Tristychius arcuatus Agassiz, 1837, Miss. Eu. `-- †Wodnika striatula (Munster, 1843] [Radamas macrocephalus] U. Perm. Eu. NA.
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. - Frickhinger, K. A., 1995: Fossil Atlas – Fishes.
–Mergus – Publishers for Natural History and Pet Books, Hans A. Baensch, Malle, Germany, 1-1088 - Long, J. A., 1995: The Rise of Fishes: 500 million years of evolution.
–Johns Hopkins University Press, Baltimore & London, pp. 1-223 - Nelson, J. S., 1994: Fishes of the world.
–John Wiley & Sons Inc., New York, 1994, xx-600 - 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