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<==o †PETALODONTIFORMES [Bradyodontii]
|?- †Paracymatodus
|--o †JANASSOIDEI
| `-- †Janassidae Jaekel, 1899
`--o †PETALODONTOIDEI
|-- †Pristodontidae Woodward, 1889
`--+-- †Petalodontidae Newberry & Worthen, 1866
`--o †Belantseidae Lund, 1989
|-- †Ctenoptychius
|-- †Netsepoye hawesi Lund, 1989
`--o †Balantsea Lund, 1989
|-- B. montana Lund, 1989
`-- B. occidentalis St. John & Worthen, 1875 [Ctenopetalus occidentalis St. John & Worthen, 1875]
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
Lund, R., 1989: New petalodonts (Chondrichthyes) from the Upper Missisippian
Bear Gulch Limestone (Namurian E2b) of Montana.
–Journal of Vertebrate Paleontology: Vol. 9, #3, pp. 350-368
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