Opinions from H. Parent 1998
- 'Alcidellus was reranked as Oxycerites (Alcidellus) and belongs to Oxycerites'
- 'Ammonites subbackeriae belongs to Ammonites' according to d'Orbigny 1850
- 'Ammonites subbackeriae is recombined as Choffatia subbakeriae'
- 'Ammonites tenuistriatus belongs to Ammonites' according to de Grossouvre 1888
- 'Ammonites tenuistriatus is recombined as Oxycerites (Alcidellus) tenuistriatus'
- 'Eurycephalites belongs to Eurycephalitinae'
- 'Eurycephalites steinmanni belongs to Eurycephalites' according to Spath 1928
- 'Eurycephalites steinmanni is recombined as Lilloettia steinmanni'
- 'Indocephalites gerthi belongs to Indocephalites' according to Spath 1928
- 'Indocephalites gerthi is recombined as Stehnocephalites gerthi'
- 'Iniskinites belongs to Eurycephalitinae'
- 'Iniskinites crassus belongs to Iniskinites' according to Riccardi and Westermann 1991
- 'Iniskinites crassus belongs to Iniskinites'
- 'Iniskinites evolutus belongs to Iniskinites'
- 'Lilloettia belongs to Eurycephalitinae'
- 'Macrocephalites araucanus belongs to Macrocephalites' according to Burckhardt 1903
- 'Macrocephalites araucanus is recombined as Xenocephalites araucanus'
- 'Macrocephalites neuquensis belongs to Macrocephalites' according to Stehn 1923
- 'Macrocephalites neuquensis is recombined as Xenocephalites neuquensis'
- 'Perisphinctes cualacensis belongs to Perisphinctes' according to Buckhardt 1927
- 'Perisphinctes cualacensis is a subjective synonym of Choffatia suborion'
- 'Perisphinctes jupiter is recombined as Choffatia jupiter'
- 'Perisphinctes jupiter belongs to Perisphinctes' according to Steinmann 1881
- 'Perisphinctes neumayri belongs to Perisphinctes' according to Siemiradzki 1899
- 'Perisphinctes neumayri is recombined as Choffatia neumayri'
- 'Perisphinctes suborion belongs to Perisphinctes' according to Burckhardt 1927
- 'Perisphinctes suborion is recombined as Choffatia suborion'
- 'Sphaeroceras extremum belongs to Sphaeroceras' according to Tornquist 1898
- 'Sphaeroceras extremum is recombined as Eurycephalites extremus'
- 'Sphaeroceras gottschei belongs to Sphaeroceras' according to Tornquist 1898
- 'Sphaeroceras gottschei is recombined as Eurycephalites gottschei'
- 'Sphaeroceras rotundum belongs to Sphaeroceras' according to Tornquist 1898
- 'Sphaeroceras rotundum is recombined as Eurycephalites rotundus'
- 'Stehnocephalites belongs to Eurycephalitinae'
- 'Stehnocephalites crassicostatus belongs to Stehnocephalites' according to Riccardi and Westermann 1991
- 'Stehnocephalites crassicostatus belongs to Stehnocephalites'
- 'Xenocephalites belongs to Eurycephalitinae'
- 'Xenocephalites involutus belongs to Xenocephalites' according to Riccardi and Westermann 1991
- 'Xenocephalites involutus is recombined as Eurycephalites involutus'