Classification of Eastman 1903
G. †Helodus Agassiz 1838
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†Helodus incisus Eastman 1903
†Helodus rugosus Newberry and Worthen 1870
G. †Fissodus St. John and Worthen 1875
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†Fissodus dentatus Eastman 1903
†Fissodus inaequalis Stjohn and Worthen 1875
G. †Peripristis St. John 1870
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†Peripristis semicircularis Newberry and Worthen 1866
G. †Petalodus
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†Petalodus allegheniensis Leidy 1856
†Petalodus arcuatus St. John 1870
G. †Homacanthus Agassiz 1845
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†Homacanthus acinaciformis Eastman 1903
†Homacanthus delicatulus Eastman 1903
Subcl. Elasmobranchii Bonaparte 1838 [elasmobranch]
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Invalid names: Pleuracanthidae Woodward [empty]
Fm. †Palaeoniscidae Vogt 1852
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G. †Elonichthys Giebel 1848
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†Elonichthys disjunctus Eastman 1903
†Elonichthys perpennatus Eastman 1902
Fm. †Platysomidae
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G. †Ctenoptychius Agassiz 1838
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†Ctenoptychius occidentalis St. John and Worthen 1875
G. †Cladodus Agassiz 1843
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†Cladodus knightianus Cope 1891
†Cladodus occidentalis Leidy 1859
Invalid names: Styptobasis Cope 1891 [synonym]
G. †Sagenodus Owen 1867
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†Sagenodus copeanus Williston 1899
†Sagenodus cristatus Agassiz 1838
Fm. †Cochliodontidae Owen 1867
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G. †Deltodus Morris and Roberts 1862
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†Deltodus angularis Newberry and Worthen 1866
†Deltodus contortus Stjohn and Worthen 1883
†Deltodus costatus Newberry and Worthen 1870
†Deltodus spatulatus Newberry and Worthen 1866
G. †Erismacanthus M'Coy 1848
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†Erismacanthus barbatus Eastman 1903
†Erismacanthus formosus Eastman 1902
†Erismacanthus maccoyanus Stjohn and Worthen 1875
G. †Physonemus Agassiz 1843
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†Physonemus arcuatus McCoy 1848
†Physonemus asper Leidy 1859
†Physonemus gemmatus Newberry and Worthen 1866
†Physonemus hamuspiscatorius Eastman 1903
G. †Sandalodus Newberry and Worthen 1866
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†Sandalodus carbonarius Newberry and Worthen 1866
†Sandalodus complanatus Newberry and Worthen 1866
G. †Stethacanthus Newberry 1889
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†Stethacanthus altonensis St. John and Worthen 1875
†Stethacanthus depressus Stjohn and Worthen 1875
†Stethacanthus productus Newberry 1897
Or. Crossopterygii Huxley 1861
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