Opinions from J. G. Maisey 1982
- 'Amelacanthus belongs to Ctenacanthidae'
- 'Amelacanthus laevis belongs to Amelacanthus' according to Davis 1883
- 'Amelacanthus plicatus belongs to Amelacanthus' according to Davis 1883
- 'Amelacanthus pustulatus belongs to Amelacanthus'
- 'Amelacanthus pustulatus belongs to Amelacanthus' according to Davis 1883
- 'Asteracanthus siderius is recombined as Bythiacanthus siderius'
- 'Bythiacanthus belongs to Ctenacanthidae'
- 'Bythiacanthus ianishevskyi belongs to Bythiacanthus' according to Khabakob 1926
- 'Bythiacanthus ianishevskyi belongs to Bythiacanthus'
- 'Bythiacanthus lucasi belongs to Bythiacanthus' according to Eastman 1902
- 'Bythiacanthus lucasi belongs to Bythiacanthus'
- 'Bythiacanthus solidus belongs to Bythiacanthus' according to Eastman 1903
- 'Bythiacanthus solidus belongs to Bythiacanthus'
- 'Bythiacanthus vanhornei belongs to Bythiacanthus' according to StJohn and Worthen 1875
- 'Bythiacanthus vanhornei belongs to Bythiacanthus'
- 'Ctenacanthus brevis is recombined as Bythiacanthus brevis'
- 'Ctenacanthus costellatus is recombined as Sphenacanthus costellatus'
- 'Eunemacanthus belongs to Ctenacanthidae'
- 'Eunemacanthus heterogyrus belongs to Eunemacanthus' according to McCoy 1855
- 'Eunemacanthus venator belongs to Eunemacanthus' according to Khabakob 1928
- 'Eunemacanthus venator belongs to Eunemacanthus'
- 'Glymmatacanthus belongs to Ctenacanthidae'
- 'Glymmatacanthus irishii belongs to Glymmatacanthus' according to StJohn and Worhten 1875
- 'Glymmatacanthus irishii belongs to Glymmatacanthus'
- 'Glymmatacanthus petrodoides belongs to Glymmatacanthus' according to StJohn et al. 1883
- 'Glymmatacanthus petrodoides belongs to Glymmatacanthus'
- 'Glymmatacanthus rudis belongs to Glymmatacanthus' according to StJohn and Worthen 1883
- 'Glymmatacanthus rudis belongs to Glymmatacanthus'
- 'Sphenacanthus aequistriatus belongs to Sphenacanthus' according to Davis 1879
- 'Sphenacanthus aequistriatus belongs to Sphenacanthus'
- 'Sphenacanthus hybodoides belongs to Sphenacanthus' according to Newberry 1873
- 'Sphenacanthus marshi belongs to Sphenacanthus' according to Newberry 1873
- 'Sphenacanthus marshi belongs to Sphenacanthus'
- 'Sphenacanthus serrulatus belongs to Sphenacanthus'