Opinions from D. Frassinetti and V. Covacevich 1999
- 'Adelomelon belongs to Volutidae'
- 'Arca belongs to Arcidae'
- 'Arca (Arca) belongs to Arca'
- 'Arca darwini belongs to Arca' according to Philippi 1887
- 'Arca darwini is recombined as Cucullaea darwini' according to Ortmann 1900
- 'Arca darwini is recombined as Cucullaria darwini'
- 'Arca patagonica is recombined as Arca (Arca) patagonica'
- 'Archaeogeryon belongs to Geryonidae'
- 'Atrina magellanica belongs to Atrina' according to Ihering 1907
- 'Brachidontes belongs to Mytilidae'
- 'Bucardiomya was reranked as Pholadomya (Bucardiomya) and belongs to Pholadomya'
- 'Cancellaria belongs to Cancellariidae'
- 'Cardiocardita belongs to Carditidae'
- 'Cardita elegantoides is recombined as Pleuromeris elegantoides'
- 'Cardita inaequalis is recombined as Cardiocardita inaequalis'
- 'Cardium philippi is recombined as Patagonicardium philippii'
- 'Cardium puelchum is recombined as Trachycardium puelchum'
- 'Chione belongs to Veneridae'
- 'Chlamys belongs to Pectinidae'
- 'Crassatella belongs to Crassatellidae'
- 'Crassatella longior belongs to Crassatella' according to Ihering 1897
- 'Crassatella longior belongs to Crassatella'
- 'Crassatellites patagonicus belongs to Crassatellites' according to Ihering 1907
- 'Crassatellites patagonicus is recombined as Crassatella patagonica'
- 'Crassostrea belongs to Ostreidae'
- 'Cucullaea belongs to Cucullaeidae'
- 'Cucullaea alta belongs to Cucullaea' according to Sowerby 1846
- 'Cucullaea alta belongs to Cucullaea'
- 'Cucullaria belongs to Parallelodontidae'
- 'Cucullaria was reranked as Cucullaea (Cucullaria) and belongs to Cucullaea' according to Ortmann 1902
- 'Cymbiola burmeisteri is recombined as Adelomelon burmeisteri'
- 'Discinisca belongs to Disciniidae'
- 'Dolium ovulum belongs to Dolium' according to Ortmann 1900
- 'Dolium ovulum is recombined as Sconsia ovulum' according to Ihering 1907
- 'Dolium ovulum is recombined as Semicassis ovulum'
- 'Dosinia belongs to Veneridae'
- 'Dosinia meridonalis belongs to Dosinia' according to Ihering 1897
- 'Dosinia meridonalis belongs to Dosinia'
- 'Eurhomalea belongs to Veneridae'
- 'Eurhomalea navidadiformis belongs to Eurhomalea'
- 'Ficus belongs to Ficidae'
- 'Fissurella belongs to Fissurellidae'
- 'Fusus patagonicus is recombined as Trophon patagonicus'
- 'Gibbula belongs to Trochidae'
- 'Gibbula dalli belongs to Gibbula' according to Ihering 1897
- 'Gibbula dalli belongs to Gibbula'
- 'Glycimeris nucleus is recombined as Panopea nucleus'
- 'Iheringiella belongs to Monophorasteridae'
- 'Iheringithyris belongs to Terebratellidae'
- 'Isognomon belongs to Isognomonidae'
- 'Lahillia belongs to Lahilliidae'
- 'Leionucula was reranked as Nucula (Leionucula) and belongs to Nucula'
- 'Limopsis belongs to Limopsidae'
- 'Macoma belongs to Tellinidae'
- 'Modiola ameghinoi is recombined as Modiolus ameghinoi'
- 'Modiola andina belongs to Modiola' according to Ortmann 1900
- 'Modiola andina is recombined as Brachydontes andina' according to Ihering 1907
- 'Modiola andina is recombined as Brachidontes andinus'
- 'Monophorinae was reranked as the family Monophorasteridae and belongs to Clypeasteroida'
- 'Neilo belongs to Malletiinae'
- 'Nucula ornata is recombined as Neilo ornata'
- 'Nucula reticularis belongs to Nucula' according to Ortmann 1900
- 'Nucula reticularis belongs to Nucula'
- 'Ostrea hatcheri is recombined as Crassostrea hatcheri'
- 'Panopaea bagualesia is recombined as Panopea bagualesia'
- 'Panope is corrected as Panopea and belongs to Hiatellidae'
- 'Patagonicardium belongs to Cardiidae'
- 'Patagonicardium iheringi belongs to Patagonicardium'
- 'Patagonicardium quadalensis belongs to Patagonicardium'
- 'Pecten centralis is recombined as Chlamys centralis'
- 'Pecten geminatus is recombined as Zygochlamys geminatus'
- 'Peonza belongs to Neogastropoda'
- 'Peonza torquata belongs to Peonza'
- 'Periploma belongs to Periplomatidae'
- 'Perna quadrisulcata is recombined as Isognomon quadrisulcata'
- 'Perna quadrisulcata belongs to Perna' according to Ihering 1897
- 'Pholadidea belongs to Pholadidae'
- 'Pholadomya belongs to Pholadomyidae'
- 'Pholadomya bucardium belongs to Pholadomya' according to Agassiz 1842
- 'Pholadomya bucardium is recombined as Pholadomya (Bucardiomya) bucardium'
- 'Pholas patagonica belongs to Pholas' according to Philippi 1887
- 'Pholas patagonica is recombined as Martesia patagonica' according to Ihering 1897
- 'Pholas patagonica is recombined as Pholadidea patagonica'
- 'Pinna belongs to Pinnidae'
- 'Pleuromeris belongs to Carditidae'
- 'Proscaphella belongs to Volutidae'
- 'Proscaphella cossmanni belongs to Proscaphella' according to Ihering 1907
- 'Proscaphella cossmanni belongs to Proscaphella'
- 'Pyrula carolina belongs to Pyrula' according to d'Orbigny 1847
- 'Pyrula carolina is recombined as Ficus carolina'
- 'Schizaster belongs to Schizasteridae'
- 'Schizasterinae was reranked as the family Schizasteridae and belongs to Spatangoida'
- 'Sedentarida belongs to Polychaeta'
- 'Semicassis belongs to Cassidae'
- 'Serpula belongs to Serpulidae'
- 'Serpulidae belongs to Sedentarida'
- 'Siphonalia belongs to Buccinidae'
- 'Solena belongs to Solenidae'
- 'Struthiolarella belongs to Struthiolariidae'
- 'Struthiolaria ameghinoi belongs to Struthiolaria' according to Ihering 1897
- 'Struthiolaria ameghinoi is recombined as Struthiolarella ameghinoi'
- 'Taioma belongs to Taiomidae'
- 'Taioma tricarinata belongs to Taioma'
- 'Taiomidae belongs to Neogastropoda'
- 'Terebratella belongs to Terebratellidae'
- 'Trachycardium belongs to Cardiidae'
- 'Trigonocoelia insolita belongs to Trigonocoelia' according to Sowerby 1846
- 'Trigonocoelia insolita is recombined as Limopsis insolita'
- 'Trochus belongs to Trochidae'
- 'Trochus laevis belongs to Trochus' according to Sowerby 1846
- 'Trochus laevis belongs to Trochus'
- 'Trophon belongs to Muricidae'
- 'Turritella belongs to Turritellidae'
- 'Turritella ambulacrum belongs to Turritella'
- 'Venus darwini belongs to Venus' according to Philippi 1887
- 'Venus darwini is recombined as Chione darwini'
- 'Venus meridonalis belongs to Venus' according to Sowerby 1846
- 'Venus meridonalis is recombined as Chione meridonalis'
- 'Venus patagonica belongs to Venus' according to Philippi 1887
- 'Venus patagonica is recombined as Chione patagonica'
- 'Voluta quemadensis belongs to Voluta' according to Ihering 1987
- 'Voluta quemadensis is recombined as Proscaphella quemadensis'