Opinions from A. Stoyanow 1949
- 'Acanthoceras compitalis belongs to Acanthoceras'
- 'Acanthoceras joserita belongs to Acanthoceras'
- 'Acanthoceras justinae belongs to Acanthoceras' according to Hill 1893
- 'Acanthoceras justinae is recombined as Dufrenoya justinae'
- 'Acanthohoplites belongs to Acanthoplitinae'
- 'Acanthohoplites berkleyi belongs to Acanthohoplites'
- 'Acanthohoplites erraticus belongs to Acanthohoplites'
- 'Acanthohoplites hesper belongs to Acanthohoplites'
- 'Acanthohoplites impetrabilis belongs to Acanthohoplites'
- 'Acanthohoplites schucherti belongs to Acanthohoplites'
- 'Acanthohoplites teres belongs to Acanthohoplites'
- 'Acanthohoplitinae is corrected as Acanthoplitinae and belongs to Parahoplitidae'
- 'Acila (Truncacila) schencki belongs to Acila (Truncacila)'
- 'Ammonites crassicostatus is recombined as Colombiceras crassicostatus'
- 'Ammonites crassicostatus belongs to Ammonites' according to d'Orbigny 1840
- 'Ammonites deshayesi belongs to Ammonites' according to Leymerie 1840
- 'Ammonites deshayesi is recombined as Deshayesites deshayesi'
- 'Ammonites dispar is recombined as Stoliczkaia dispar'
- 'Ammonites dufrenoyi belongs to Ammonites' according to d'Orbigny 1840
- 'Ammonites dufrenoyi is recombined as Dufrenoya dufrenoyi'
- 'Astarte adkinsi belongs to Astarte'
- 'Beudanticeras belongs to Desmoceratidae'
- 'Beudanticeras victoris belongs to Beudanticeras'
- 'Cleoniceras schlaudti belongs to Cleoniceras'
- 'Colombiceras belongs to Acanthoplitinae'
- 'Colombiceras brumale belongs to Colombiceras'
- 'Deshayesites belongs to Deshayesitinae'
- 'Deshayesites butleri belongs to Deshayesites'
- 'Deshayesites temerarius belongs to Deshayesites'
- 'Deshayesitinae belongs to Parahoplitidae'
- 'Desmoceratidae belongs to Ammonoidea'
- 'Douvilleiceras belongs to Ammonoidea'
- 'Douvilleiceras muralense belongs to Douvilleiceras'
- 'Exogyra lancha belongs to Exogyra'
- 'Gervillia cholla belongs to Gervillia'
- 'Gervillia heinemani belongs to Gervillia'
- 'Gervillia rasori belongs to Gervillia'
- 'Hypacanthohoplites belongs to Acanthoceratinae'
- 'Idonearca belongs to Parallelodontidae'
- 'Idonearca stephensoni belongs to Idonearca'
- 'Immunitoceras belongs to Acanthoplitinae'
- 'Immunitoceras immunitum belongs to Immunitoceras'
- 'Kazanskyella belongs to Parahoplitinae'
- 'Kazanskyella arizonica belongs to Kazanskyella'
- 'Lima cholla belongs to Lima'
- 'Lima espinal belongs to Lima'
- 'Lima muralensis belongs to Lima'
- 'Neithea belongs to Pectinidae'
- 'Neithea vicinalis belongs to Neithea'
- 'Ostrea edwilsoni belongs to Ostrea'
- 'Paracanthohoplites belongs to Acanthoplitinae'
- 'Paracanthohoplites meridionalis belongs to Paracanthohoplites'
- 'Parahoplites belongs to Parahoplitinae'
- 'Parahoplites (Dufrenoyia) [misspelled as Dufrenoya] belongs to Deshayesitinae'
- 'Parahoplites aschiltaensis belongs to Parahoplites' according to Anthula 1899
- 'Parahoplites aschiltaensis is recombined as Acanthohoplites aschiltaensis'
- 'Parahoplites melchioris belongs to Parahoplites'
- 'Parahoplitidae belongs to Ammonoidea'
- 'Parahoplitinae belongs to Parahoplitidae'
- 'Pecten (Chlamys) thompsoni belongs to Pecten (Chlamys)'
- 'Pteria peregrina belongs to Pteria'
- 'Sinzowiella belongs to Parahoplitinae'
- 'Sinzowiella spathi belongs to Sinzowiella'
- 'Stoliczkaia belongs to Lyelliceratidae'
- 'Stoliczkaia excentrumbilicata belongs to Stoliczkaia'
- 'Stoliczkaia patagonica belongs to Stoliczkaia'
- 'Stoliczkaia scotti belongs to Stoliczkaia'
- 'Trigonia cragini belongs to Trigonia'
- 'Trigonia guildi belongs to Trigonia'
- 'Trigonia kitchini belongs to Trigonia'
- 'Trigonia maloneana belongs to Trigonia'
- 'Trigonia mearnsi belongs to Trigonia'
- 'Trigonia reesidei belongs to Trigonia'
- 'Trigonia resoluta belongs to Trigonia'
- 'Trigonia saavedra belongs to Trigonia'
- 'Trigonia stolleyi belongs to Trigonia' according to Hill 1893
- 'Trigonia taffi belongs to Trigonia' according to Cragin 1893
- 'Trigonia vyschetzkii belongs to Trigonia' according to Cragin 1905
- 'Trigonia weaveri belongs to Trigonia'