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''Ctenacanthus'' (from el, κτείς , 'comb' and el, ἄκανθα , 'spine') is an extinct genus of
''Ctenacanthus amblyxiphias'' Cope, 1891
Fossil Sharks of the Rocky Mountains: Ctenacanthus and other Chondrichthyan Spines and Denticles. Wayne Itano, Boulder, Colorado, Karen Houck and Martin Lockley, University of Colorado, Denver
Prehistoric cartilaginous fish genera Carboniferous sharks Carboniferous animals of North America Taxa named by Louis Agassiz {{Paleo-cartilaginous-fish-stub
ctenacanthiform
Ctenacanthiformes is an extinct order of chondrichthyan fish. They possessed ornamented fin spines and cladodont dentition. Members of the family Ctenacanthidae may have survived into the Cretaceous based on teeth found in deep water deposits of ...
chondrichthyan
Chondrichthyes (; ) is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or ''bony fishes'', which have skeletons primarily composed of bone tissue. C ...
. Remains have been found in the Bloyd Formation in Arkansas, United States (Carboniferous period) and in South America.Acanthodian fish remains from the Upper Silurian or Lower Devonian of the Amazon Basin, Brazil. Philippe Janvier, Jose Henrique G. Melo, Palaeontology, Aug 1988, Vol 31, part 3
Valid species
* ''Ctenacanthus buttersi'' St. John & Worthen, 1883 * ''Ctenacanthus chemungensis'' Claypole, 1885 * ''Ctenacanthus concinnus'' Newberry, 1875 * ''Ctenacanthus denticulatus'' McCoy, 1848 * ''Ctenacanthus formosus'' Newberry, 1873 * ''Ctenacanthus harrissi'' Caster, 1930 * ''Ctenacanthus lamborni'' Wells, 1944 * ''Ctenacanthus major'' Agassiz, 1843 * ''Ctenacanthus pellensis'' St. John & Worthen, 1883 * ''Ctenacanthus sculptus'' St. John & Worthen, 1875 * ''Ctenacanthus terrelli'' Newberry, 1889 * ''Ctenacanthus tumidus'' Newberry, 1889 * ''Ctenacanthus vetustus'' Eastman, 1902 * ''Ctenacanthus wrightii'' Newberry, 1884 *''Ctenacanthus amblyxiphias'' Cope, 1891See also
*List of prehistoric cartilaginous fish genera
This list of prehistoric cartilaginous fish genera is an attempt to create a comprehensive listing of all genera that have ever been included in the class chondrichthyes ''and'' are known from the fossil record. This list excludes purely vernacul ...
References
External links
Fossil Sharks of the Rocky Mountains: Ctenacanthus and other Chondrichthyan Spines and Denticles. Wayne Itano, Boulder, Colorado, Karen Houck and Martin Lockley, University of Colorado, Denver
Prehistoric cartilaginous fish genera Carboniferous sharks Carboniferous animals of North America Taxa named by Louis Agassiz {{Paleo-cartilaginous-fish-stub