Opinions from R. Rivera 1957
- 'Acrilla was reranked as Epitonium (Acrilla) and belongs to Epitonium'
- 'Admete belongs to Cancellariidae'
- 'Admete (Bonellitia) olssoni belongs to Admete (Bonellitia)'
- 'Ampullina paracasina belongs to Ampullina'
- 'Anconia belongs to Melanidae'
- 'Anconia elenensis belongs to Anconia'
- 'Anconia elenensis surensis belongs to Anconia elenensis'
- 'Andicula belongs to Turridae'
- 'Andicula olssoni belongs to Andicula'
- 'Antigona belongs to Veneridae'
- 'Antigona (Artena) inca belongs to Antigona (Artena)' according to Olsson 1939
- 'Arcacea belongs to Taxodonta'
- 'Architectonica belongs to Architectonicidae'
- 'Architectonica sullana belongs to Architectonica' according to Olsson 1928
- 'Architectonica sullana is recombined as Architectonica (Stellaxis) sullana'
- 'Architectonicidae belongs to Cerithiacea'
- 'Arcidae belongs to Arcacea'
- 'Arginella belongs to Arcidae'
- 'Arginella icaensis belongs to Arginella'
- 'Artena was reranked as Antigona (Artena) and belongs to Antigona'
- 'Asthenodonta belongs to Teleodesmacea'
- 'Bonellitia was reranked as Admete (Bonellitia) and belongs to Admete'
- 'Buccinacea belongs to Rachiglossa'
- 'Buccinidae belongs to Buccinacea'
- 'Cancellariidae belongs to Toxoglossa'
- 'Cardita belongs to Carditidae'
- 'Cardita (Carditamera) newelli belongs to Cardita (Carditamera)'
- 'Carditacea belongs to Diagenodonta'
- 'Carditamera was reranked as Cardita (Carditamera) and belongs to Cardita'
- 'Carditidae belongs to Carditacea'
- 'Cerithiacea belongs to Taenioglossa'
- 'Cerithiopsidae belongs to Cerithiacea'
- 'Cerithiopsis belongs to Cerithiopsidae'
- 'Cerithiopsis lechuzaensis belongs to Cerithiopsis'
- 'Corbula belongs to Corbulidae'
- 'Corbula paracasensis belongs to Corbula'
- 'Corbulidae belongs to Myacea'
- 'Costacallista was reranked as Macrocallista (Costacallista) and belongs to Macrocallista'
- 'Ctenobranchiata belongs to Streptoneura'
- 'Diagenodonta belongs to Teleodesmacea'
- 'Dorsanum belongs to Pseudolivinae'
- 'Dosinia belongs to Dosiniidae'
- 'Dosinia coloradoensis belongs to Dosinia'
- 'Dosinia lechuzaensis belongs to Dosinia'
- 'Eopleurotoma belongs to Turridae'
- 'Eopleurotoma paracasina belongs to Eopleurotoma'
- 'Epitoniidae belongs to Ptenoglossa'
- 'Epitonium belongs to Epitoniidae'
- 'Epitonium (Acrilla) peruvianum belongs to Epitonium (Acrilla)'
- 'Fasciolariidae is corrected as Fasciolaridae and belongs to Buccinacea'
- 'Glycymerididae is corrected as Glycymeridae and belongs to Arcacea'
- 'Glycymeris belongs to Glycymeridae'
- 'Glycymeris arquilloensis belongs to Glycymeris'
- 'Macrocallista belongs to Veneridae'
- 'Melaniidae [misspelled as Melanidae] belongs to Cerithiacea'
- 'Melongena belongs to Pseudolivinae'
- 'Myacea belongs to Asthenodonta'
- 'Nassa lagunitensis is recombined as Dorsanum lagunitensis'
- 'Naticacea belongs to Taenioglossa'
- 'Naticidae belongs to Naticacea'
- 'Ostrea belongs to Ostreidae'
- 'Ostrea paracasensis belongs to Ostrea'
- 'Ostrea pejerreyensis belongs to Ostrea'
- 'Ostreacea belongs to Schizodonta'
- 'Ostreidae belongs to Ostreacea'
- 'Perna arbolensis is recombined as Raetomya arbolensis'
- 'Peruficus belongs to Fasciolaridae'
- 'Peruficus lagunitensis belongs to Peruficus'
- 'Pitar belongs to Veneridae'
- 'Pitar (Lamelliconcha) belongs to Pitar'
- 'Pitaria (Lamelliconcha) baldryi belongs to Pitaria (Lamelliconcha)' according to Olsson 1928
- 'Pitaria (Lamelliconcha) baldryi is recombined as Pitar (Lamelliconcha) baldryi'
- 'Polinices belongs to Naticidae'
- 'Prionodesmacea belongs to Pelecypoda'
- 'Pseudoliva belongs to Pseudolivinae'
- 'Pseudoliva monilis belongs to Pseudoliva' according to Olsson 1928
- 'Pseudoliva parinasensis belongs to Pseudoliva' according to Olsson 1928
- 'Pseudoliva parinasensis samanica belongs to Pseudoliva parinasensis' according to Olsson 1928
- 'Pseudolivinae belongs to Buccinidae'
- 'Ptenoglossa was reranked as a suborder and belongs to Ctenobranchiata'
- 'Rachiglossa was reranked as a suborder and belongs to Ctenobranchiata'
- 'Raetomya belongs to Corbulidae'
- 'Schizodonta belongs to Prionodesmacea'
- 'Sinum belongs to Naticidae'
- 'Sinum pacificum belongs to Sinum'
- 'Siphonalia belongs to Pseudolivinae'
- 'Siphonalia acuta belongs to Siphonalia'
- 'Siphonalia trilica belongs to Siphonalia'
- 'Stellaxis was reranked as Architectonica (Stellaxis) and belongs to Architectonica'
- 'Streptoneura belongs to Gastropoda'
- 'Surcula occidentalis is recombined as Andicula occidentalis'
- 'Taenioglossa was reranked as a suborder and belongs to Ctenobranchiata'
- 'Taxodonta belongs to Prionodesmacea'
- 'Teleodesmacea belongs to Pelecypoda'
- 'Teleodonta belongs to Teleodesmacea'
- 'Toxoglossa belongs to Ctenobranchiata'
- 'Turridae belongs to Toxoglossa'
- 'Turritella belongs to Turritellidae'
- 'Turritella portaroi belongs to Turritella' according to Lisson 1925
- 'Turritella portaroi is a subjective synonym of Turritella woodsi'
- 'Turritella woodsi belongs to Turritella'
- 'Turritellidae belongs to Cerithiacea'
- 'Veneracea belongs to Teleodonta'
- 'Veneridae belongs to Veneracea'
- 'Voluta belongs to Volutidae'
- 'Voluta (Peruluta) belongs to Voluta'
- 'Voluta (Peruluta) mancorensis belongs to Voluta (Peruluta)' according to Olsson 1928
- 'Voluta (Peruluta) mancorensis belongs to Voluta (Peruluta)'
- 'Volutacea belongs to Rachiglossa'
- 'Volutidae belongs to Volutacea'
- 'Xancidae belongs to Buccinacea'
- 'Xancus belongs to Xancidae'
- 'Xancus (Eoxancus) talarensis is recombined as Xancus talarensis'