Opinions from A. A. Olsson 1928
- 'Alectrion salina belongs to Alectrion'
- 'Alectrion terebratula belongs to Alectrion'
- 'Amotapidae belongs to Mytilacea'
- 'Amotapus belongs to Amotapidae'
- 'Ampullina gabbi belongs to Ampullina' according to Woods 1922
- 'Ampullina gabbi belongs to Ampullina'
- 'Ampullina ortoni belongs to Ampullina' according to Gavv 1870
- 'Ampullina ortoni belongs to Ampullina'
- 'Anomia septenaria belongs to Anomia'
- 'Arca (Scapharca) pittieri belongs to Arca (Scapharca)' according to Dall 1912
- 'Arca grandis belongs to Arca' according to Pilsbry 1921
- 'Architectonica chiraensis belongs to Architectonica'
- 'Architectonica jabonillensis belongs to Architectonica'
- 'Atrina talarensis belongs to Atrina'
- 'Aturia alabamensis peruviana belongs to Aturia alabamensis'
- 'Callocardia salvia belongs to Callocardia'
- 'Cardium (Ringicardium) belongs to Cardium' according to Fischer 1887
- 'Cardium (Ringicardium) belongs to Cardium'
- 'Cardium (Ringicardum) restinense belongs to Cardium (Ringicardum)'
- 'Cardium (Trigoniocardia) samanicum belongs to Cardium (Trigoniocardia)'
- 'Carolia (Carolia) belongs to Carolia' according to Cantraine 1838
- 'Carolia (Carolia) belongs to Carolia'
- 'Carolia (Carolia) peruviana belongs to Carolia (Carolia)'
- 'Cassidea maccormacki belongs to Cassidea'
- 'Cerithium boweni belongs to Cerithium'
- 'Cerithium hopkinsi belongs to Cerithium'
- 'Cerithium iddingsi belongs to Cerithium'
- 'Cerithium xenium belongs to Cerithium'
- 'Clavilithes lagunitensis belongs to Clavilithes'
- 'Clavilithes pozoensis belongs to Clavilithes'
- 'Clavilithes woodringi belongs to Clavilithes'
- 'Clementia (Clementia) restinensis belongs to Clementia (Clementia)'
- 'Corbula (Cuspicorbula) belongs to Corbula'
- 'Corbula (Cuspicorbula) busera belongs to Corbula (Cuspicorbula)'
- 'Corbula boggsi belongs to Corbula'
- 'Corbula greda belongs to Corbula'
- 'Corbula jabonillaensis belongs to Corbula'
- 'Corbula negritensis belongs to Corbula'
- 'Corbula salina belongs to Corbula'
- 'Corbula tangara belongs to Corbula'
- 'Cornulina was reranked as Melongena (Cornulina) and belongs to Melongena'
- 'Cypraea (Monetaria) boggsi belongs to Cypraea (Monetaria)'
- 'Diplodonta dissona belongs to Diplodonta'
- 'Donax (Donax) belongs to Donax'
- 'Donax (Donax) parinensis belongs to Donax (Donax)'
- 'Donax (Latona) capparis belongs to Donax (Latona)'
- 'Donax (Latona) prosopsis belongs to Donax (Latona)'
- 'Dorsanum parinense belongs to Dorsanum'
- 'Eovasum peruvianum belongs to Eovasum' according to H. Douvillé 1921
- 'Eovasum peruvianum is recombined as Voluta (Peruluta) peruviana'
- 'Eutrephoceras haughti belongs to Eutrephoceras'
- 'Eutrephoceras negritensis belongs to Eutrephoceras'
- 'Grateloupia (Grateloupia) belongs to Grateloupia' according to Des Moulins 1828
- 'Grateloupia (Grateloupia) belongs to Grateloupia'
- 'Grateloupia (Grateloupia) peruviana belongs to Grateloupia (Grateloupia)'
- 'Haminea labrea belongs to Haminea'
- 'Haminea solaria belongs to Haminea'
- 'Hercoglossa peruviana belongs to Hercoglossa'
- 'Liothyrina peruviana belongs to Liothyrina'
- 'Lyria sabulosa belongs to Lyria'
- 'Macoma (Psammacoma) talarensis belongs to Macoma (Psammacoma)'
- 'Macrocallista inca belongs to Macrocallista'
- 'Melongena (Cornulina) levifusoides belongs to Melongena (Cornulina)'
- 'Melongena (Pugilina) oedicnema belongs to Melongena (Pugilina)'
- 'Mytilus euglyphus belongs to Mytilus'
- 'Natica (Natica) peruviana belongs to Natica (Natica)'
- 'Olivancillaria (Agaronia) saxosa belongs to Olivancillaria (Agaronia)'
- 'Olivella vicana belongs to Olivella'
- 'Ostrea negritensis belongs to Ostrea'
- 'Ostrea samanensis belongs to Ostrea'
- 'Ovula negritensis belongs to Ovula'
- 'Oxyperas was reranked as Spisula (Oxyperas) and belongs to Spisula'
- 'Perna arbolensis is recombined as Amotapus arbolensis'
- 'Pitaria (Lamelliconcha) negritensis belongs to Pitaria (Lamelliconcha)'
- 'Pitaria (Lamelliconcha) parinensis belongs to Pitaria (Lamelliconcha)'
- 'Pitaria (Lamelliconcha) salsola belongs to Pitaria (Lamelliconcha)'
- 'Pitaria (Lamelliconcha) samanensis belongs to Pitaria (Lamelliconcha)'
- 'Pitaria (Lamelliconcha) saponaria belongs to Pitaria (Lamelliconcha)'
- 'Pitaria (Pitaria) sciaena belongs to Pitaria (Pitaria)'
- 'Pitaria (Tivelina) siliqua belongs to Pitaria (Tivelina)'
- 'Polinices (Lunatia) vicanus belongs to Polinices (Lunatia)'
- 'Polinices (Neverita) samanensis belongs to Polinices (Neverita)'
- 'Polinices (Polinices) woodsi belongs to Polinices (Polinices)'
- 'Polinices (Sigaticus) harrisi belongs to Polinices (Sigaticus)'
- 'Pseudoliva modesta belongs to Pseudoliva'
- 'Pseudoliva mutabilis belongs to Pseudoliva'
- 'Pseudoliva parinasensis mancorensis belongs to Pseudoliva parinasensis'
- 'Pyrula otaria belongs to Pyrula'
- 'Rostellaria gaudichaudi belongs to Rostellaria' according to d'Orbigny 1842
- 'Rostellaria gaudichaudi is recombined as Ectinochilus gaudichaudi'
- 'Rostellaria laqueata belongs to Rostellaria' according to Conrad 1833
- 'Dientomochilus (Ectinochilus) laqueata is a subjective synonym of Ectinochilus gaudichaudi'
- 'Sconsia samanica belongs to Sconsia'
- 'Sigaretus (Sigatica) is reassigned into Polinices'
- 'Spisula (Oxyperas) callistoides belongs to Spisula (Oxyperas)'
- 'Spisula (Oxyperas) deserta belongs to Spisula (Oxyperas)'
- 'Spisula (Oxyperas) parinensis belongs to Spisula (Oxyperas)'
- 'Spisula (Spisula) caleta belongs to Spisula (Spisula)'
- 'Spisula (Spisula) hualtaca belongs to Spisula (Spisula)'
- 'Spisula (Spisula) summa belongs to Spisula (Spisula)'
- 'Telescopium parinense belongs to Telescopium'
- 'Telescopium samanense belongs to Telescopium'
- 'Tibia (Aulacodiscus) is reassigned into Calyptraphorus'
- 'Tibia (Aulacodiscus) lissoni is recombined as Calyptraphorus (Aulacodiscus) lissoni'
- 'Tibia (Aulacodiscus) lissoni belongs to Tibia (Aulacodiscus)' according to H. Douvillé 1921
- 'Tivelina was reranked as Pitaria (Tivelina) and belongs to Pitaria'
- 'Tritonidea staufti belongs to Tritonidea'
- 'Trochus apertus is recombined as Calyptraea (Trochatella) aperta'
- 'Turritella boughtoni belongs to Turritella'
- 'Turritella hopkinsi belongs to Turritella'
- 'Turritella iddingsi belongs to Turritella'
- 'Turritella keswickensis belongs to Turritella'
- 'Xancus peruvianus belongs to Xancus'