Opinions from C. R. Eastman 1903
- 'Chirodus belongs to Platysomidae'
- 'Chitonodus tribulis belongs to Chitonodus' according to Stjohn and Worthen 1883
- 'Chitonodus tribulis is recombined as Poecilodus tribulis'
- 'Cholodus inaequalis belongs to Cholodus' according to Stjohn and Worthen 1875
- 'Cholodus inaequalis is recombined as Fissodus inaequalis'
- 'Chomatodus arcuatus is recombined as Petalodus arcuatus'
- 'Cladodus occidentalis belongs to Cladodus'
- 'Cochliodus costatus belongs to Cochliodus' according to Newberry and Worthen 1870
- 'Cochliodus costatus is recombined as Deltodus costatus'
- 'Cochliodus occidentalis belongs to Cochliodus' according to Leidy 1857
- 'Cochliodus occidentalis belongs to Cochliodus'
- 'Coelacanthus exiguus belongs to Coelacanthus' according to Eastman 1902
- 'Coelacanthus exiguus belongs to Coelacanthus'
- 'Ctenacanthus amblyxiphias belongs to Ctenacanthus'
- 'Ctenodus cristatus is recombined as Sagenodus cristatus'
- 'Ctenopetalus occidentalis is recombined as Ctenoptychius occidentalis'
- 'Ctenoptychius semicircularis belongs to Ctenoptychius' according to Newberry and Worthen 1866
- 'Ctenoptychius semicircularis is recombined as Peripristis semicircularis'
- 'Deltodus belongs to Cochliodontidae'
- 'Deltodus angularis belongs to Deltodus'
- 'Deltodus complanatus belongs to Deltodus' according to Newberry and Worthen 1866
- 'Deltodus complanatus is recombined as Sandalodus complanatus'
- 'Deltodus spatulatus belongs to Deltodus' according to Newberry and Worthen 1866
- 'Deltodus spatulatus belongs to Deltodus'
- 'Diplodus compressus is recombined as Pleuracanthus compressus'
- 'Drepanacanthus gemmatus belongs to Drepanacanthus' according to Newberry and Worthen 1866
- 'Drepanacanthus gemmatus is recombined as Physonemus gemmatus'
- 'Drepanacanthus stellatus belongs to Drepanacanthus' according to Newberry and Worthen 1866
- 'Drepanacanthus stellatus is recombined as Batacanthus stellatus' according to Hambach 1890
- 'Elonichthys belongs to Palaeoniscidae'
- 'Elonichthys disjunctus belongs to Elonichthys'
- 'Elonichthys perpennatus belongs to Elonichthys'
- 'Erismacanthus belongs to Cochliodontidae'
- 'Erismacanthus barbatus belongs to Erismacanthus'
- 'Erismacanthus formosus belongs to Erismacanthus' according to Eastman 1902
- 'Erismacanthus formosus belongs to Erismacanthus'
- 'Erismacanthus maccoyanus belongs to Erismacanthus' according to Stjohn and Worthen 1875
- 'Erismacanthus maccoyanus belongs to Erismacanthus'
- 'Fissodus dentatus belongs to Fissodus'
- 'Helodus incisus belongs to Helodus'
- 'Helodus rugosus belongs to Helodus' according to Newberry and Worthen 1870
- 'Helodus rugosus belongs to Helodus'
- 'Homacanthus acinaciformis belongs to Homacanthus'
- 'Homacanthus delicatulus belongs to Homacanthus'
- 'Janassa maxima belongs to Janassa'
- 'Lophodus variabilis is recombined as Campodus variabilis'
- 'Megalichthys belongs to Osteolepidae'
- 'Megalichthys macropomus belongs to Megalichthys'
- 'Orodus intermedius belongs to Orodus'
- 'Osteolepidae belongs to Crossopterygii'
- 'Petalodus allegheniensis belongs to Petalodus'
- 'Phoebodus belongs to Pleuracanthidae'
- 'Phoebodus densneptuni belongs to Phoebodus'
- 'Phoebodus knightianus belongs to Phoebodus'
- 'Physonemus belongs to Cochliodontidae'
- 'Physonemus altonensis is recombined as Stethacanthus altonensis'
- 'Physonemus arcuatus belongs to Physonemus'
- 'Physonemus depressus belongs to Physonemus' according to Stjohn and Worthen 1875
- 'Physonemus depressus is recombined as Stethacanthus depressus'
- 'Physonemus hamuspiscatorius belongs to Physonemus'
- 'Platysomus belongs to Platysomidae'
- 'Platysomus circularis belongs to Platysomus' according to Newberry and Worthen 1870
- 'Platysomus circularis belongs to Platysomus'
- 'Platysomus orbicularis belongs to Platysomus' according to Newberry and Worthen 1870
- 'Platysomus orbicularis is recombined as Chirodus orbicularis'
- 'Pleuracanthidae belongs to Elasmobranchii'
- 'Poecilodus belongs to Cochliodontidae'
- 'Poecilodus rugosus belongs to Poecilodus' according to Newberry and Worthen 1866
- 'Sagenodus copeanus belongs to Sagenodus' according to Williston 1899
- 'Sagenodus copeanus belongs to Sagenodus'
- 'Sandalodus belongs to Cochliodontidae'
- 'Sandalodus carbonarius belongs to Sandalodus'
- 'Sandalodus laevissimus belongs to Sandalodus' according to Newberry and Worthen 1866
- 'Stethacanthus belongs to Cochliodontidae'
- 'Stethacanthus productus belongs to Stethacanthus'
- 'Streblodus angustus belongs to Streblodus'
- 'Styptobasis is a subjective synonym of Cladodus'
- 'Styptobasis knightiana belongs to Styptobasis' according to Cope 1891
- 'Styptobasis knightiana is recombined as Cladodus knightianus'
- 'Taeniodus contortus belongs to Taeniodus' according to Stjohn and Worthen 1883
- 'Taeniodus contortus is recombined as Deltodus contortus'
- 'Xystracanthus arcuatus belongs to Xystracanthus' according to Leidy 1859
- 'Xystracanthus arcuatus is recombined as Physonemus asper'
- 'Xystrodus occidentalis is recombined as Platyxystrodus occidentalis'