Opinions from A. A. Olsson 1964
- 'Acteocina belongs to Acteocinidae'
- 'Acteocina subbullata belongs to Acteocina'
- 'Admete belongs to Cancellariidae'
- 'Admete (Bonellitia) beatrix belongs to Admete (Bonellitia)'
- 'Admete (Marksella) belongs to Admete'
- 'Admete (Marksella) jumala belongs to Admete (Marksella)'
- 'Admete crispa belongs to Admete' according to Möller 1842
- 'Ademete (Admetula) is a subjective synonym of Admete (Bonellitia)'
- 'Adrana aegra belongs to Adrana'
- 'Aforia belongs to Cochlespirinae'
- 'Aforia ecuadoriana belongs to Aforia'
- 'Agladrillia belongs to Drillinae'
- 'Amusium bocasense belongs to Amusium'
- 'Anadara (Anadara) springvalensis is recombined as Anadara (Rasia) springvalensis'
- 'Anadara (Caloosarca) mompicha belongs to Anadara (Caloosarca)'
- 'Anadara (Cunearca) boggsi belongs to Anadara (Cunearca)'
- 'Anadara (Cunearca) melita belongs to Anadara (Cunearca)'
- 'Anadara (Diluvarca) pasada belongs to Anadara (Diluvarca)'
- 'Anadara (Sectiarca) marksi belongs to Anadara (Sectiarca)'
- 'Ancistrosyrinx belongs to Cochlespirinae'
- 'Anodontia (Lissosphaira) belongs to Anodontia' according to Olsson 1961
- 'Anodontia (Lissosphaira) belongs to Anodontia'
- 'Arca (Anadara) toroensis is recombined as Anadara (Grandiarca) chiriquiensis toroensis'
- 'Arca (Arca) suspecta belongs to Arca (Arca)'
- 'Arca colomba is recombined as Anadara (Diluvarca) colomba'
- 'Arca hindsi is recombined as Anadara (Cunearca) hindsi'
- 'Arca proletaria is recombined as Lunarca proletaria'
- 'Artemis ponderosa is recombined as Dosinia (Dosinidia) ponderosa'
- 'Barbatia (Barbatia) picota belongs to Barbatia (Barbatia)'
- 'Bathybembix dalliana belongs to Bathybembix'
- 'Bonellitia was reranked as Admete (Bonellitia) and belongs to Admete'
- 'Borsonella belongs to Borsoniinae'
- 'Borsoniinae belongs to Turridae'
- 'Buccinum taurinum belongs to Buccinum' according to Lightfoot 1786
- 'Buccinum taurinum is recombined as Terebra (Paraterebra) taurina'
- 'Calcarata was reranked as Cancellaria (Calcarata) and belongs to Cancellaria'
- 'Calliotectinae belongs to Volutidae'
- 'Calliotectum belongs to Calliotectinae'
- 'Calliotectum fischeri belongs to Calliotectum'
- 'Calliotectum vernicosum belongs to Calliotectum' according to Dall 1890
- 'Calliotectum vernicosum belongs to Calliotectum'
- 'Cancellaria belongs to Cancellariidae'
- 'Cancellaria (Calcarata) trochilia belongs to Cancellaria (Calcarata)'
- 'Cancellaria (Cancellaria) belongs to Cancellaria'
- 'Cancellaria (Cancellaria) esmeralda belongs to Cancellaria (Cancellaria)'
- 'Cancellaria (Cancellaria) metuloides belongs to Cancellaria (Cancellaria)'
- 'Cancellaria (Cancellaria) penita belongs to Cancellaria (Cancellaria)' according to Olsson 1942
- 'Cancellaria (Cancellaria) penita belongs to Cancellaria (Cancellaria)'
- 'Cancellaria (Cancellaria) xenia belongs to Cancellaria (Cancellaria)'
- 'Cancellaria (Charcolleria) belongs to Cancellaria'
- 'Cancellaria (Charcolleria) terryi belongs to Cancellaria (Charcolleria)'
- 'Cancellaria (Euclia) fragosa belongs to Cancellaria (Euclia)'
- 'Cancellaria (Euclia) serrata belongs to Cancellaria (Euclia)'
- 'Cancellaria (Hertleinia) belongs to Cancellaria'
- 'Cancellaria (Hertleinia) angosturana belongs to Cancellaria (Hertleinia)' according to Marks 1949
- 'Cancellaria (Hertleinia) angosturana belongs to Cancellaria (Hertleinia)'
- 'Cancellaria (Hertleinia) marksi belongs to Cancellaria (Hertleinia)'
- 'Cancellaria (Massyla) jadisi belongs to Cancellaria (Massyla)'
- 'Cancellaria (Pyruclia) belongs to Cancellaria'
- 'Cancellaria (Pyruclia) [misspelled as Cancellaria (Peruclia)] belongs to Cancellaria' according to Pilsbry and Olsson 1941
- 'Cancellaria (Pyruclia) lacondamini belongs to Cancellaria (Pyruclia)'
- 'Cancellaria (Pyruclia) pycta belongs to Cancellaria (Pyruclia)'
- 'Cancellaria (Pyruclia) telemba belongs to Cancellaria (Pyruclia)'
- 'Cancellaria bonellii belongs to Cancellaria' according to Bellardi 1841
- 'Cancellaria bonellii is recombined as Admete (Bonellitia) bonellii'
- 'Cancellaria calcarata belongs to Cancellaria' according to Brochhi 1814
- 'Cancellaria calcarata is recombined as Cancellaria (Calcarata) calcarata'
- 'Cancellaria cassidiformis is recombined as Cancellaria (Euclia) cassidiformis'
- 'Cancellaria cerithea belongs to Cancellaria'
- 'Cancellaria corrugata belongs to Cancellaria' according to Hinds 1843
- 'Cancellaria corrugata is recombined as Cancellaria (Massyla) corrugata'
- 'Cancellaria dariena is recombined as Cancellaria (Cancellaria) dariena'
- 'Cancellaria mitriformis belongs to Cancellaria' according to Sowerby 1832
- 'Cancellaria mitriformis is recombined as Cancellaria (Hertleinia) mitriformis'
- 'Cancellaria solida is recombined as Cancellaria (Pyruclia) solida'
- 'Cancellaria solida [misspelled as Cancellaria (Peruclia) solida] belongs to Cancellaria (Peruclia)' according to Pilsbry and Olsson 1941
- 'Cantharus (Triumphis) predistortus is recombined as Northia (Nicema) predistorta'
- 'Cardita cuvieri is recombined as Cardita (Cardita) cuvieri'
- 'Cardium (Dinocardium) ecuadorialis is recombined as Dinocardium (Exocardium) ecuadorialis'
- 'Cardium (Trachycardium) dominicense is recombined as Trachycardium (Trachycardium) dominicense'
- 'Cardium (Trigoniocardia) hannai belongs to Cardium (Trigoniocardia)' according to Olsson 1932
- 'Cardium (Trigoniocardia) hannai is recombined as Trigoniocardia (Trigoniocardia) hannai'
- 'Cardium belcheri is recombined as Trachycardium (Phlogocardia) belcheri'
- 'Cardium ecuadoriale is recombined as Dinocardium (Exocardium) ecuadoriale'
- 'Cavilucina (Pegophysema) thalmanni belongs to Cavilucina (Pegophysema)' according to Marks 1951
- 'Cavilucina (Pegophysema) thalmanni is recombined as Anodontia (Lissosphaira) thalmanni'
- 'Chione tegulum is recombined as Chionopsis tegula'
- 'Clathrodrillia belongs to Drillinae'
- 'Clathrodrillia (Buridrillia) was reranked as Buridrillia and belongs to Drillinae'
- 'Clathrodrillia (Buridrillia) panarica belongs to Clathrodrillia (Buridrillia)' according to Olsson 1942
- 'Clathrodrillia (Buridrillia) panarica is recombined as Buridrillia panarica'
- 'Clathrodrillia (Carinodrillia) was reranked as Carinodrillia and belongs to Drillinae'
- 'Cochlespirinae belongs to Turridae'
- 'Compsodrillia belongs to Drillinae'
- 'Conus belongs to Conidae'
- 'Conus (Leptoconus) imitator lius is recombined as Conus imitator lius'
- 'Conus (Leptoconus) sophus belongs to Conus (Leptoconus)' according to Olsson 1932
- 'Conus (Leptoconus) sophus is recombined as Conus sophus'
- 'Conus cacuminatus belongs to Conus'
- 'Conus granozonatus belongs to Conus'
- 'Conus harrisi belongs to Conus'
- 'Conus mompichensis belongs to Conus' according to Olsson 1964
- 'Conus patricius belongs to Conus'
- 'Conus planiliratus belongs to Conus'
- 'Conus veatchi belongs to Conus'
- 'Corbula hexacyma is recombined as Caryocorbula (Hexacorbula) hexacyma'
- 'Crassatellites (Crassinella) bowdenensis is recombined as Crassinella bowdenensis'
- 'Crassatellites (Scambula) berryi belongs to Crassatellites (Scambula)' according to Spieker 1922
- 'Crassatellites (Scambula) berryi is recombined as Eucrassatella (Hybolophus) berryi'
- 'Cyclinella beteyensis belongs to Cyclinella'
- 'Cylichna belongs to Scaphandridae'
- 'Cypraea henikeni is recombined as Siphocypraea (Muracypraea) henekeni'
- 'Dalium belongs to Cassidae'
- 'Dalium ecuadoriana belongs to Dalium'
- 'Dallora belongs to Drillinae'
- 'Dallora ecuadoria belongs to Dallora'
- 'Daphnella (Eubela) imparella belongs to Daphnella (Eubela)' according to Dall 1908
- 'Daphnella (Eubela) imparella is recombined as Dallora imparella'
- 'Delphinula trigonostoma is recombined as Trigonostoma trigonostoma'
- 'Dinocardium (Exocardium) belongs to Dinocardium'
- 'Dinocardium chipolanum belongs to Dinocardium' according to Dall 1900
- 'Dinocardium chipolanum is recombined as Dinocardium (Exocardium) chipolanum'
- 'Dosinia grandis is a subjective synonym of Dosinia (Dosinidia) ponderosa'
- 'Eubela was reranked as Daphnella (Eubela) and belongs to Daphnella' according to Dall 1908
- 'Euclia was reranked as Cancellaria (Euclia) and belongs to Cancellaria'
- 'Ficus lanzi belongs to Ficus'
- 'Fusiturricula belongs to Turriculinae'
- 'Gemophos belongs to Buccinidae'
- 'Glyphostoma belongs to Mangeliinae'
- 'Gordanops belongs to Buccinidae'
- 'Gratelupia mactropsis is recombined as Chione (Panchione) mactropsis'
- 'Hastula belongs to Terebridae'
- 'Hemipleurotoma is a subjective synonym of Gemmula'
- 'Hindsia belongs to Buccinidae'
- 'Hindsiclava belongs to Drillinae'
- 'Kelletia ecuadorium belongs to Kelletia' according to Olsson 1964
- 'Kelletia rugosa belongs to Kelletia'
- 'Leda ornata is recombined as Nuculana (Saccella) ornata'
- 'Lepicythara belongs to Mangeliinae'
- 'Lirotarte belongs to Astartidae'
- 'Lucina (Lucinoma) chiripanica belongs to Lucina (Lucinoma)'
- 'Lucina (Paslucina) belongs to Lucina'
- 'Lucina (Paslucina) follis belongs to Lucina (Paslucina)'
- 'Lucinoma was reranked as Lucina (Lucinoma) and belongs to Lucina'
- 'Lutraria undulata is recombined as Raeta undulata'
- 'Mactra (Harvella) was reranked as Harvella and belongs to Mactrinae'
- 'Mactra (Harvella) belongs to Mactra' according to Gray 1853
- 'Mactra (Harvella) sanctiblasii is a subjective synonym of Harvella elegans'
- 'Mactra elegans is recombined as Harvella elegans'
- 'Mactra pallida is recombined as Mulinia pallida'
- 'Mangeliinae belongs to Turridae'
- 'Massyla was reranked as Cancellaria (Massyla) and belongs to Cancellaria'
- 'Meretrix dariena is recombined as Clementia (Clementia) dariena'
- 'Metaphos belongs to Buccinidae'
- 'Myrtaea (Levimyrtaea) belongs to Myrtaea'
- 'Myrtaea (Levimyrtaea) inconspicua belongs to Myrtaea (Levimyrtaea)'
- 'Mysterostropha belongs to Calliotectinae'
- 'Mysterostropha gyrina belongs to Mysterostropha'
- 'Nannoidella belongs to Cochlespirinae'
- 'Neosconsia belongs to Cassidae'
- 'Nicema was reranked as Northia (Nicema) and belongs to Northia'
- 'Nucula (Ennucula) docilis belongs to Nucula (Ennucula)'
- 'Nucula (Nucula) mirada belongs to Nucula (Nucula)'
- 'Nuculana (Jupiteria) chiriquiana belongs to Nuculana (Jupiteria)'
- 'Nuculana (Saccella) crassatelloides belongs to Nuculana (Saccella)'
- 'Ostrea megodon is recombined as Ostrea (Alectryonia) megadon'
- 'Pachyturris belongs to Drillinae'
- 'Pachyturris carissa belongs to Pachyturris'
- 'Panchione was reranked as Chione (Panchione) and belongs to Chione'
- 'Panopaea coquimbensis is recombined as Panopea coquimbensis'
- 'Pecten (Flabellipecten) gatunensis belongs to Pecten (Flabellipecten)'
- 'Pecten sericeus is recombined as Pecten (Flabellipecten) sericeus'
- 'Perunassa belongs to Buccinidae'
- 'Pitar (Lamelliconcha) thomsoni is recombined as Lamelliconcha thomsoni'
- 'Placunanomia [misspelled as Placuanomia] belongs to Anomiidae'
- 'Pleurodon subdolus is recombined as Nucinella subdolus'
- 'Pleurotoma (Gemmula) was reranked as Gemmula and belongs to Turrinae'
- 'Pleurotoma (Gemmula) vaningeni is recombined as Gemmula vaningeni'
- 'Pleurotoma militaris is recombined as Hindsiclava militaris'
- 'Pleurotomella belongs to Mangeliinae'
- 'Pleurotomella (Phymorhynchus) agina belongs to Pleurotomella (Phymorhynchus)' according to Olsson 1942
- 'Pleurotomella (Phymorhynchus) agina is recombined as Dallora agina'
- 'Pleurotomella esmeralda belongs to Pleurotomella'
- 'Polystira belongs to Turrinae'
- 'Prodallia is a subjective synonym of Calliotectum'
- 'Protocardia gurabica is recombined as Lophocardium gurabicum'
- 'Prunum belongs to Marginellidae'
- 'Prunum (Prunum) belongs to Prunum' according to Swainson 1840
- 'Prunum (Prunum) belongs to Prunum'
- 'Prunum (Prunum) godini belongs to Prunum (Prunum)'
- 'Psammothalia is a subjective synonym of Temnoconcha'
- 'Scaphander belongs to Scaphandridae'
- 'Scapharca henekeni is recombined as Anadara (Sectiarca) henekeni'
- 'Scobinella belongs to Borsoniinae'
- 'Semele laevis costaricensis is recombined as Semele costaricensis'
- 'Strioterebrum belongs to Terebridae'
- 'Tellina (Moerella) meropsis belongs to Tellina (Moerella)' according to Dall 1900
- 'Tellina (Moerella) meropsis is recombined as Moerella meropsis'
- 'Tellina (Moerella) paziana belongs to Tellina (Moerella)' according to Dall 1900
- 'Tellina (Moerella) paziana is a subjective synonym of Moerella meropsis'
- 'Tellina (Scissula) cercadica belongs to Tellina (Scissula)' according to Maury 1917
- 'Tellina (Scissula) cercadica is recombined as Temnoconcha cercadica'
- 'Tellina lamproleuca is recombined as Psammacoma lamproleuca'
- 'Temnoconcha belongs to Macominae'
- 'Teramachia is a subjective synonym of Calliotectum'
- 'Terebra belongs to Terebridae'
- 'Terebra (Myurellina) belongs to Terebra'
- 'Terebra (Oxymeria) gatunensis is recombined as Strioterebrum gatunensis'
- 'Terebra (Paraterebra) belongs to Terebra'
- 'Terebra (Strioterebrum) guanabana belongs to Terebra (Strioterebrum)' according to Olsson 1942
- 'Terebra (Strioterebrum) guanabana is recombined as Strioterebrum guanabanum'
- 'Terebra flammea is a subjective synonym of Terebra (Paraterebra) taurina'
- 'Terebra robusta is recombined as Terebra (Paraterebra) robusta'
- 'Terebra subsulcifera is recombined as Terebra (Myurella) subsulcifera'
- 'Terebra texana is a subjective synonym of Terebra (Paraterebra) taurina'
- 'Thatcheria belongs to Cochlespirinae'
- 'Thatcheria (Conicheria) belongs to Thatcheria'
- 'Thatcheria (Conicheria) ecuadoriana belongs to Thatcheria (Conicheria)'
- 'Trigonostoma belongs to Cancellariidae'
- 'Trigonostoma thisbe belongs to Trigonostoma'
- 'Trigonostoma triumpha belongs to Trigonostoma'
- 'Turriculinae belongs to Turridae'
- 'Turrigemma is a subjective synonym of Hindsiclava'
- 'Turrinae belongs to Turridae'
- 'Turris (Surcula) fusinella is recombined as Fusiturricula fusinella'
- 'Venus concentrica is recombined as Dosinia (Dosinidia) concentrica'
- 'Voluta prunum is recombined as Prunum prunum'
- 'Voluta reticulata is recombined as Cancellaria reticulata'