Classification of the genus Ctenacanthus

G. †Ctenacanthus Agassiz 1836
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†Ctenacanthus abnormis Giebel 1858
†Ctenacanthus acutus Eastman 1897
†Ctenacanthus angulatus Newberry and Worthen 1866
†Ctenacanthus angustus Newberry 1889
†Ctenacanthus burlingtonensis Stjohn and Worthen 1875
†Ctenacanthus buttersi St John and Worthen 1883
†Ctenacanthus chemungensis Claypole 1885
†Ctenacanthus clarkii Newberry 1889
†Ctenacanthus cliftonensis Branson and Mehl 1938
†Ctenacanthus compressus Newberry 1889
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Invalid names: Ctenacanthus clarki Newberry 1889 [synonym]
†Ctenacanthus costatus Newberry and Worthen 1866
†Ctenacanthus coxianus Stjohn and Worthen 1883
†Ctenacanthus cylindricus Newberry 1889
†Ctenacanthus decussatus Eastman 1902
†Ctenacanthus depressus Newberry 1897
†Ctenacanthus elegans Tuomey 1858
†Ctenacanthus excavatus Saint John and Worthen 1875
†Ctenacanthus fallax Woodward 1891
†Ctenacanthus formosus Newberry 1873
†Ctenacanthus furcicarinatus Newberry 1875
†Ctenacanthus gemmatus Saint John and Worthen 1875
†Ctenacanthus gracillimus Newberry and Worthen 1866
†Ctenacanthus gradocostatus Saint John and Worthen 1875
†Ctenacanthus gurleyi Newberry 1897
†Ctenacanthus keokuk Saint John and Worthen 1875
†Ctenacanthus laevis Davis 1883
†Ctenacanthus littoni Newberry 1889
†Ctenacanthus major Agassiz 1836
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Invalid names: Ctenacanthus deflexus St. John and Worthen 1883 [objective synonym], Ctenacanthus harrisoni St. John and Worthen 1883 [objective synonym], Ctenacanthus maximus de Koninck 1878 [synonym], Ctenacanthus salopiensis Davis 1883 [objective synonym], Ctenacanthus spectabilis St. John and Worthen 1875 [objective synonym], Ctenacanthus tenuistriatus Agassiz 1836 [objective synonym], Ctenacanthus varians St. John and Worthen 1875 [objective synonym]
†Ctenacanthus marshii Newberry 1873
†Ctenacanthus mayi Newberry and Worthen 1870
†Ctenacanthus minor Davis 1879
†Ctenacanthus mutabilis Branson 1933
†Ctenacanthus ornatus Agassiz 1836
†Ctenacanthus pellensis Saint John and Worthen 1883
†Ctenacanthus pugiunculus Saint John and Worthen 1875
†Ctenacanthus randalli Newberry 1889
†Ctenacanthus sculptus Saint John and Worthen 1875
†Ctenacanthus similis Saint John and Worthen 1875
†Ctenacanthus speciosus Saint John and Worthen 1875
†Ctenacanthus triangularis Newberry 1873
†Ctenacanthus venustus Eastman 1902
†Ctenacanthus vetustus Newberry 1873
†Ctenacanthus wrighti Newberry 1884
†Ctenacanthus xiphias Saint John and Worthen 1883
Invalid names: Ctenacanthus crenatus McCoy 1855 [nomen dubium], Ctenacanthus crenulatus Agassiz 1837 [nomen nudum]