Opinions from J. B. Knight et al. 1960
- 'Acanthonema belongs to Turritellidae'
- 'Aclisina belongs to Murchisoniidae'
- 'Aclisina selkirkii is a subjective synonym of Aclisina striatula'
- 'Acmaea belongs to Acmaeidae'
- 'Acmaeadae is corrected as Acmaeidae and belongs to Patellacea'
- 'Acteonidae belongs to Acteonacea'
- 'Actita is a subjective synonym of Platyceras'
- 'Actita munsteriana is recombined as Platyceras munsteriana'
- 'Agathodonta belongs to Chilodontinae'
- 'Aglaoglypta was reranked as Bellerophon (Aglaoglypta) and belongs to Bellerophon'
- 'Agnathodonta is an objective synonym of Agathodonta'
- 'Agnesia belongs to Agnesiinae'
- 'Agnesiinae belongs to Eotomariinae'
- 'Agniesella belongs to Portlockiellidae'
- 'Altomarginula was reranked as Emarginula (Altomarginula) and belongs to Emarginula'
- 'Altrix was reranked as Puncturella (Altrix) and belongs to Puncturella'
- 'Amaurotoma belongs to Trochonematidae'
- 'Amberleyacea belongs to Archaeogastropoda'
- 'Amberleyidae belongs to Amberleyacea'
- 'Amblychilepas belongs to Fissurellinae'
- 'Amphiscapha was reranked as Straparollus (Amphiscapha) and belongs to Straparollus'
- 'Amphiscapha (Cylicioscapha) was reranked as Cylicioscapha and belongs to Euomphalidae'
- 'Amphitomaria belongs to Euomphalidae'
- 'Ampulloscalites is a subjective synonym of Scalitina'
- 'Ananias was reranked as Glabrocingulum (Ananias) and belongs to Glabrocingulum'
- 'Anastrophina belongs to Holopeinae'
- 'Anconochilus belongs to Sinuitinae'
- 'Anconochilus barnesi belongs to Anconochilus'
- 'Angariinae belongs to Trochidae'
- 'Ankorella is a subjective synonym of Cylindritopsis'
- 'Angyomphalus was reranked as Trepospira (Angyomphalus) and belongs to Trepospira'
- 'Anisostoma belongs to Euomphalidae'
- 'Anomphalacea belongs to Trochina'
- 'Anomphalidae belongs to Anomphalacea'
- 'Anomphalus belongs to Anomphalidae'
- 'Antirotella is a subjective synonym of Anomphalus'
- 'Antispira belongs to Scaevogyrinae'
- 'Antitrochus belongs to Gyronematinae'
- 'Apachella belongs to Neilsoniinae'
- 'Araeonema belongs to Gyronematinae'
- 'Arastra belongs to Liospirinae'
- 'Archaeogastropoda belongs to Prosobranchia'
- 'Archinacella belongs to Archinacellidae'
- 'Archinacellidae belongs to Archinacellacea'
- 'Arctomphalus is a subjective synonym of Maclureadae'
- 'Arginula was reranked as Emarginula (Arginula) and belongs to Emarginula'
- 'Arizonella belongs to Raphistomidae'
- 'Arizonella allecta belongs to Arizonella'
- 'Aspidotheca belongs to Pterothecinae'
- 'Aspidotheca schrieli belongs to Aspidotheca'
- 'Astralites belongs to Pseudophoridae'
- 'Atractotrema belongs to Fissurellinae'
- 'Atrypa transversa is recombined as Pterotheca transversa'
- 'Aulacomerella is a subjective synonym of Pterotheca'
- 'Aulacostrepsis belongs to Loxonematidae'
- 'Aulopea is a subjective synonym of Visitator'
- 'Aulopea nelsoni is recombined as Visitator nelsoni'
- 'Auriptygma belongs to Meekospiridae'
- 'Austriacopsis belongs to Emarginulinae'
- 'Austriacopsis (Austriacopsis) belongs to Austriacopsis'
- 'Austroglyphis was reranked as Diodora (Austroglyphis) and belongs to Diodora'
- 'Babylonites belongs to Omphalotrochidae'
- 'Balboaina was reranked as Fissurella (Balboaina) and belongs to Fissurella'
- 'Balinula was reranked as Austriacopsis (Balinula) and belongs to Austriacopsis'
- 'Barnesella was reranked as Lecanospira (Barnesella) and belongs to Lecanospira'
- 'Bathmopterus is a subjective synonym of Euomphalopterus'
- 'Bathmopterus liratus is recombined as Euomphalopterus liratus'
- 'Bathyclides belongs to Codonocheilidae'
- 'Baylea belongs to Omospirinae'
- 'Bellerophon belongs to Bellerophontidae'
- 'Bellerophon (Bellerophon) belongs to Bellerophon'
- 'Bellerophon (Coelocyclus) was reranked as Coelocyclus and belongs to Bucaniides'
- 'Bellerophon (Coelocyclus) rarissimus is recombined as Coelocyclus rarissimus'
- 'Bellerophon (Prosoptychus) was reranked as Prosoptychus and belongs to Bellerophontinae'
- 'Sphaerocyclus is a subjective synonym of Bellerophon'
- 'Bellerophon bilobatus is recombined as Sinuites bilobatus'
- 'Bellerophon cancellatus is recombined as Sinuites (Sinuites) cancellatus'
- 'Bellerophon clausus is recombined as Sphenosphaera clausus'
- 'Bellerophon contortus is recombined as Megalomphala contorta'
- 'Bellerophon crenistria is recombined as Crenistriella crenistria'
- 'Bellerophon curvilineatus is recombined as Tropidodiscus curvilineatus'
- 'Bellerophon lindsleyi is recombined as Bucania lindsleyi'
- 'Bellerophon megalostoma is recombined as Salpingostoma megalostoma'
- 'Bellerophon patulus is recombined as Ptomatis patulus'
- 'Bellerophon sulcatinus is recombined as Bucania sulcatinus'
- 'Bellerophon tubulosus is recombined as Liljevallospira tubulosa'
- 'Bellerophontacea belongs to Bellerophontida'
- 'Bellerophontidae belongs to Bellerophontacea'
- 'Bellerophontina belongs to Archaeogastropoda'
- 'Bellerophontinae belongs to Bellerophontidae'
- 'Bembexia belongs to Eotomariides'
- 'Beraunia belongs to Oriostomatidae'
- 'Berlieria belongs to Patellinae'
- 'Borestus belongs to Phymatopleuridae'
- 'Brachytomaria belongs to Phanerotrematidae'
- 'Brilonella belongs to Murchisoniidae'
- 'Brochidium belongs to Craspedostomatidae'
- 'Brochidium (Temnospira) was reranked as Temnospira and belongs to Craspedostomatidae'
- 'Brunonia belongs to Patellinae'
- 'Bucanella belongs to Bucaniellidae'
- 'Bucanella nana belongs to Bucanella'
- 'Bucania belongs to Bucaniides'
- 'Bucania bidorsata is recombined as Tetranota bidorsata'
- 'Bucaniella esthona is recombined as Kokenospira esthona'
- 'Bucaniellidae belongs to Sinuitidae'
- 'Bucaniellinae is corrected as Bucanellinae and belongs to Sinuitidae'
- 'Bucaniides belongs to Bucaniinae'
- 'Bucaniinae belongs to Bellerophontidae'
- 'Bucanopsis belongs to Carinaropsinae'
- 'Bucanopsis carinifera belongs to Bucanopsis'
- 'Bucanospira belongs to Craspedostomatidae'
- 'Bucanospira expansa belongs to Bucanospira'
- 'Buechelia belongs to Raphistomatinae'
- 'Bulimorpha belongs to Subulitinae'
- 'Caenogastropoda belongs to Gastropoda'
- 'Calaurops belongs to Ophiletinae'
- 'Caliendrum belongs to Pithodeinae'
- 'Calliostoma (Eocalliostoma) was reranked as Eocalliostoma and belongs to Proconulinae'
- 'Calliostomatinae belongs to Trochidae'
- 'Callistadia belongs to Omospirinae'
- 'Callitomaria belongs to Phymatopleuridae'
- 'Callonema is replaced by Elasmonema'
- 'Callotrochus belongs to Proconulinae'
- 'Carcellesia was reranked as Fissurella (Carcellesia) and belongs to Fissurella'
- 'Carinaropsidae was reranked as the subfamily Carinaropsinae and belongs to Bellerophontidae'
- 'Carinaropsis belongs to Carinaropsinae'
- 'Carinaropsis (Phragmostoma) cymbula is recombined as Carinaropsis cymbula'
- 'Carinaropsis carinatus is corrected as Carinaropsis carinata and belongs to Carinaropsis'
- 'Catantostoma belongs to Catantostomatinae'
- 'Catantostomatinae was reranked as the family Catantostomatidae and belongs to Pleurotomariacea'
- 'Cataschisma belongs to Planozonides'
- 'Centrifugus belongs to Euomphaloidea'
- 'Centrifugus planorbis belongs to Centrifugus'
- 'Ceratopea belongs to Pleurotomariacea'
- 'Ceraunocochlis belongs to Subulitinae'
- 'Cerithiacea belongs to Caenogastropoda'
- 'Cerithioides belongs to Murchisoniidae'
- 'Chalarostrepsis belongs to Tropidodiscinae'
- 'Chalarostrepsis praecursor belongs to Chalarostrepsis'
- 'Cheilotomona belongs to Murchisoniidae'
- 'Chepultapecia belongs to Platyschismatinae'
- 'Chilodonta belongs to Chilodontinae'
- 'Chilodonta (Chilodonta) belongs to Chilodonta' according to Etallon 1862
- 'Chilodontinae belongs to Trochidae'
- 'Chilodontoidea belongs to Chilodontinae'
- 'Cibecuia belongs to Murchisoniidae'
- 'Cinclidonema belongs to Gyronematinae'
- 'Cirridae belongs to Amberleyacea'
- 'Cirropsis is a subjective synonym of Holopea'
- 'Clathrospira belongs to Eotomariides'
- 'Climacoraphistoma is a subjective synonym of Pararaphistoma'
- 'Clioderma is a subjective synonym of Pterotheca'
- 'Clioderma saffordi is recombined as Pterotheca saffordi'
- 'Clisospira belongs to Clisospirinae'
- 'Clisospiracea belongs to Archaeogastropoda'
- 'Clisospiridae belongs to Clisospiracea'
- 'Clisospirinae belongs to Clisospiridae'
- 'Cloudia belongs to Cyrtolitidae'
- 'Cloudia buttsi belongs to Cloudia'
- 'Clypidella was reranked as Fissurella (Clypidella) and belongs to Fissurella'
- 'Clypidina belongs to Emarginulinae'
- 'Cocculinidae belongs to Cocculinacea'
- 'Codinella belongs to Phymatopleuridae'
- 'Codonocheilidae belongs to Craspedostomatacea'
- 'Codonocheilus belongs to Codonocheilidae'
- 'Codonocheilus striatum belongs to Codonocheilus'
- 'Coelocaulus is a subjective synonym of Michelia'
- 'Coelocentrus is an objective synonym of Maclurites'
- 'Coelodiscus belongs to Euomphalidae'
- 'Coelozonides belongs to Coelozoninae'
- 'Coelozoninae belongs to Gosseletinidae'
- 'Colpites belongs to Platyschismatinae'
- 'Colpomphalus belongs to Helicotominae'
- 'Colubrella belongs to Tubinidae'
- 'Condonella belongs to Euomphalidae'
- 'Conorhytis belongs to Acmaeidae'
- 'Conradella is a subjective synonym of Phragmolites'
- 'Conradella obliqua is recombined as Phragmolites obliqua'
- 'Coreospira belongs to Coreospiridae'
- 'Coreospiridae belongs to Helcionellacea'
- 'Cosmetalepas belongs to Fissurellinae'
- 'Cowwarrella is a subjective synonym of Visitator'
- 'Cowwarrella cylindrica is recombined as Visitator cylindrica'
- 'Craniopsis was reranked as Puncturella (Cranopsis) and belongs to Puncturella'
- 'Craspedostoma belongs to Craspedostomatidae'
- 'Craspedostoma (Ploconema) is reassigned into Cyclonema'
- 'Craspedostoma (Sellinema) was reranked as Sellinema and belongs to Sinuopeinae'
- 'Craspedostomatacea belongs to Archaeogastropoda'
- 'Craspedostomatidae belongs to Craspedostomatacea'
- 'Cremides was reranked as Fissurella (Cremides) and belongs to Fissurella'
- 'Crenilunula belongs to Euomphalopteridae'
- 'Crenistriella belongs to Sinuitinae'
- 'Crossostomatidae belongs to Craspedostomatacea'
- 'Cyclites belongs to Trochonematidae'
- 'Cyclobathmus belongs to Trochonematidae'
- 'Cycloholcus belongs to Coreospiridae'
- 'Cyclonema belongs to Platyceratidae'
- 'Cyclonemina is a subjective synonym of Cyclonema'
- 'Cyclonema delicatulum belongs to Cyclonema'
- 'Cyclophoracea belongs to Caenogastropoda'
- 'Cyclophoridae belongs to Cyclophoracea'
- 'Cyclora is a subjective synonym of Cyclonema'
- 'Cyclotheca belongs to Pterothecinae'
- 'Cyclozyga belongs to Pseudozygopleuridae'
- 'Cylindritopsis belongs to Soleniscinae'
- 'Cymatospira was reranked as Knightites (Cymatospira) and belongs to Knightites'
- 'Cymbularia belongs to Bellerophontinae'
- 'Cymbularia galeata belongs to Cymbularia'
- 'Cyrtolites belongs to Cyrtolitidae'
- 'Cyrtolites discus is recombined as Tropidodiscus discus'
- 'Cyrtolites lamellifer is recombined as Temnodiscus lamellifer'
- 'Cyrtolites pharetra is recombined as Pharetrolites pharetra'
- 'Cyrtolitidae belongs to Bellerophontacea'
- 'Cyrtolitina is an objective synonym of Temnodiscus'
- 'Cyrtospira was reranked as Subulites (Cyrtospira) and belongs to Subulites'
- 'Daidia belongs to Microdomatidae'
- 'Damesia belongs to Naticopsinae'
- 'Dendropupa belongs to Cyclophoridae'
- 'Deslongchampsia belongs to Acmaeidae'
- 'Devonocerithioides belongs to Murchisoniidae'
- 'Devonozyga belongs to Palaeozygopleuridae'
- 'Diaphorostoma is a subjective synonym of Platyostoma'
- 'Dichostasia belongs to Craspedostomatidae'
- 'Dicosmos belongs to Naticopsinae'
- 'Dictyotomaria was reranked as Glyptotomaria (Dictyotomaria) and belongs to Glyptotomaria'
- 'Dietrichiella was reranked as Scurriopsis (Dietrichiella) and belongs to Scurriopsis'
- 'Dihelice belongs to Codonocheilidae'
- 'Dimorphotectus belongs to Proconulinae'
- 'Diodora belongs to Diodorinae'
- 'Diodora (Diodora) belongs to Diodora'
- 'Diodorinae belongs to Fissurellidae'
- 'Diplochilus belongs to Proconulinae'
- 'Diploconula belongs to Omphalotrochidae'
- 'Diplozone belongs to Plethospirinae'
- 'Dirachis belongs to Plagiothyridae'
- 'Dirhachopea belongs to Ophiletinae'
- 'Discohelix belongs to Euomphalidae'
- 'Discordichilus belongs to Elasmonematidae'
- 'Discotectus belongs to Proconulinae'
- 'Discotomaria belongs to Phymatopleuridae'
- 'Discotropis belongs to Omphalotrochidae'
- 'Distemnostoma is a subjective synonym of Visitator'
- 'Distemnostoma princeps is recombined as Visitator princeps'
- 'Dolichoschisma was reranked as Macroschisma (Dolichoschisma) and belongs to Macroschisma'
- 'Donaldiella was reranked as Loxoplocus (Donaldiella) and belongs to Loxoplocus'
- 'Donaldina belongs to Streptacididae'
- 'Dyeria was reranked as Cyclonema (Dyeria) and belongs to Cyclonema'
- 'Ecculiomphalus belongs to Euomphaloidea'
- 'Eccyliomphalus alatus is recombined as Ecculiomphalus alatus'
- 'Eccyliopterus is a subjective synonym of Ecculiomphalus'
- 'Echinocirrus belongs to Luciellidae'
- 'Ectomaria belongs to Murchisoniidae'
- 'Eirlysia belongs to Eotomariides'
- 'Eiselia belongs to Anomphalidae'
- 'Elasmonema belongs to Elasmonematidae'
- 'Elasmonematidae belongs to Microdomatacea'
- 'Elegidion was reranked as Diodora (Elegidion) and belongs to Diodora'
- 'Emarginula belongs to Emarginulinae'
- 'Emarginula (Emarginula) belongs to Emarginula'
- 'Emarginula (Subzeidora) belongs to Emarginula'
- 'Emarginula (Tauschia) belongs to Emarginula'
- 'Emarginulidae belongs to Fissurellacea'
- 'Emersonia belongs to Emarginulinae'
- 'Enantiostoma belongs to Agnesiinae'
- 'Entomella was reranked as Emarginula (Entomella) and belongs to Emarginula'
- 'Eobucania belongs to Bucaniides'
- 'Eobucania pulchra belongs to Eobucania'
- 'Eocryptaenia is a subjective synonym of Liospira'
- 'Eocryptaenia singularis belongs to Eocryptaenia'
- 'Eocryptaulina is a subjective synonym of Mourlonia'
- 'Eoptychia belongs to Pseudozygopleuridae'
- 'Eotomaria belongs to Eotomariides'
- 'Eotomariidae belongs to Pleurotomariacea'
- 'Eotomariides belongs to Eotomariinae'
- 'Eotomariinae belongs to Eotomariidae'
- 'Eotrochus belongs to Pseudophoridae'
- 'Epiptychia belongs to Luciellidae'
- 'Episfaxis belongs to Microdomatidae'
- 'Epulotrochus belongs to Proconulinae'
- 'Eucochlis belongs to Elasmonematidae'
- 'Euconia belongs to Ophiletinae'
- 'Euconospira belongs to Ptychomphalides'
- 'Eunema was reranked as Trochonema (Eunema) and belongs to Trochonema'
- 'Euomphalacea belongs to Macluritina'
- 'Euomphalidae belongs to Euomphalacea'
- 'Euomphalopsis was reranked as Macluritella (Euomphalopsis) and belongs to Macluritella'
- 'Euomphalopteridae belongs to Pleurotomariacea'
- 'Euomphalopterus belongs to Euomphalopteridae'
- 'Euomphalus was reranked as Straparollus (Euomphalus) and belongs to Straparollus'
- 'Euomphalus (Woehrmannia) was reranked as Woehrmannia and belongs to Euomphalidae'
- 'Euomphalus pugilis is recombined as Straparollus (Euomphalus) pugilis'
- 'Euphemites belongs to Euphemitinae'
- 'Euphemitinae belongs to Sinuitidae'
- 'Euryalox belongs to Phymatopleuridae'
- 'Euryzone belongs to Coelozonides'
- 'Euzone belongs to Ptychomphalides'
- 'Exogyroceras is a subjective synonym of Platyostoma'
- 'Eymarella belongs to Phymatopleuridae'
- 'Fissurella belongs to Fissurellinae'
- 'Fissurella (Fissurella) belongs to Fissurella'
- 'Fissurellacea belongs to Pleurotomariina'
- 'Fissurellidae belongs to Fissurellacea'
- 'Fissurellidea belongs to Fissurellinae'
- 'Fissurellinae belongs to Fissurellidae'
- 'Fissurisepta was reranked as Puncturella (Fissurisepta) and belongs to Puncturella'
- 'Flemingella is a subjective synonym of Pseudophorus'
- 'Floyda belongs to Palaeotrochidae'
- 'Forolepas was reranked as Macroschisma (Forolepas) and belongs to Macroschisma'
- 'Frombachia belongs to Naticopsinae'
- 'Fuchsella belongs to Sinuitinae'
- 'Fusispira was reranked as Subulites (Fusispira) and belongs to Subulites'
- 'Gasconadia belongs to Murchisoniidae'
- 'Geronticeras is a subjective synonym of Orthonychia'
- 'Girtyspira belongs to Meekospiridae'
- 'Glabrocingulum belongs to Eotomariides'
- 'Globispira is a subjective synonym of Cataschisma'
- 'Glyphodeta belongs to Murchisoniidae'
- 'Glyptospira belongs to Microdomatidae'
- 'Glyptotomaria belongs to Phymatopleuridae'
- 'Goniasma belongs to Murchisoniidae'
- 'Gonionema is a subjective synonym of Proturritella'
- 'Goniospira filosa is recombined as Donaldiella filosa'
- 'Goniostropha is a subjective synonym of Murchisonia'
- 'Gosseletina belongs to Gosseletininae'
- 'Gosseletinidae belongs to Pleurotomariacea'
- 'Gosseletininae belongs to Gosseletinidae'
- 'Gyrodoma belongs to Pithodeinae'
- 'Gyroma belongs to Pleurotomariacea'
- 'Gyronema belongs to Gyronematinae'
- 'Gyronema altispiralis is recombined as Shansiella altispiralis'
- 'Gyronematinae belongs to Holopeidae'
- 'Gyrospira belongs to Carinaropsinae'
- 'Gyrospira tourteloti belongs to Gyrospira'
- 'Gyrotrema is an objective synonym of Tremanotus'
- 'Haliotidae belongs to Pleurotomariacea'
- 'Halistylinae belongs to Trochidae'
- 'Hamptoniella belongs to Acmaeidae'
- 'Haplospira is a subjective synonym of Holopea'
- 'Haplospira variabilis is recombined as Holopea variabilis'
- 'Helcion belongs to Patellinae'
- 'Helcionella belongs to Helcionellidae'
- 'Helcionellacea belongs to Bellerophontina'
- 'Helcionellidae belongs to Helcionellacea'
- 'Helicospira belongs to Murchisoniidae'
- 'Helicotis belongs to Scaevogyrinae'
- 'Helicotoma belongs to Helicotominae'
- 'Helicotominae was reranked as the family Helicotomidae and belongs to Euomphaloidea'
- 'Helictes helicinaeformis is recombined as Anomphalus helicinaeformis'
- 'Helictostylus is an objective synonym of Strophostylus'
- 'Helminthozyga belongs to Pseudozygopleuridae'
- 'Hemitoma belongs to Fissurellidae'
- 'Hemitoma (Hemitoma) belongs to Hemitoma'
- 'Hemizyga belongs to Pseudozygopleuridae'
- 'Hemizyga (Hyphantozyga) belongs to Hemizyga'
- 'Hemizyga (Plocezyga) was reranked as Plocezyga and belongs to Pseudozygopleurinae'
- 'Hesperiella belongs to Agnesiinae'
- 'Himantonia belongs to Platyceratidae'
- 'Hippocampoides belongs to Euomphalidae'
- 'Hisingeria is an objective synonym of Centrifugus'
- 'Hologyra (Vernelia) was reranked as Vernelia and belongs to Naticopsinae'
- 'Holopea belongs to Holopeinae'
- 'Holopea sweeti is recombined as Sinuopea sweeti'
- 'Holopeidae belongs to Platyceratacea'
- 'Holopeinae belongs to Holopeidae'
- 'Holopella is a subjective synonym of Loxonema'
- 'Horiostoma is a subjective synonym of Oriostoma'
- 'Horiostomella belongs to Sinuopeinae'
- 'Hormotomina was reranked as Murchisonia (Hormotomina) and belongs to Murchisonia'
- 'Horologium belongs to Planitrochidae'
- 'Hungariella belongs to Neritopsinae'
- 'Hydrobiidae belongs to Rissoacea'
- 'Hypselentoma belongs to Omospirinae'
- 'Hystricoceras belongs to Pseudophoridae'
- 'Ianthinopsis belongs to Soleniscinae'
- 'Igoceras is a subjective synonym of Orthonychia'
- 'Isonema belongs to Anomphalidae'
- 'Isospira belongs to Bellerophontacea'
- 'Jarlopsis is a subjective synonym of Euconia'
- 'Jarlopsis conicus is recombined as Euconia conicus'
- 'Katoptychia belongs to Loxonematidae'
- 'Katospira (Girvania) was reranked as Girvania and belongs to Loxonematidae'
- 'Keeneia belongs to Turbonellininae'
- 'Keration belongs to Tubinidae'
- 'Kittlitrochus belongs to Calliostomatidae'
- 'Knightella belongs to Pseudozygopleurinae'
- 'Knightites belongs to Knightitinae'
- 'Knightites (Knightites) belongs to Knightites'
- 'Knightites multicornutus is recombined as Knightites (Knightites) multicornutus'
- 'Knightitinae belongs to Bellerophontidae'
- 'Kobayashiella belongs to Scaevogyrinae'
- 'Kokenella belongs to Porcelliidae'
- 'Kokenospira belongs to Bucaniides'
- 'Kokenospira (Tritonophon) trimetra is recombined as Bucanella trimetra'
- 'Koniakaua was reranked as Rimulopsis (Koniakaua) and belongs to Rimulopsis'
- 'Labridens belongs to Soleniscinae'
- 'Laeogyra belongs to Onychochilinae'
- 'Latischisma is a subjective synonym of Shansiella'
- 'Latitaenia belongs to Coelozonides'
- 'Latouchella belongs to Coreospiridae'
- 'Lecanospira belongs to Maclureadae'
- 'Lepetellidae belongs to Cocculinacea'
- 'Lepetidae belongs to Patellacea'
- 'Lepetopsis belongs to Metoptomatidae'
- 'Leptomphalus was reranked as Straparollus (Leptomphalus) and belongs to Straparollus'
- 'Leptoptygma belongs to Subulitinae'
- 'Lesueurilla belongs to Euomphaloidea'
- 'Liljevallospira belongs to Bellerophontinae'
- 'Liomphalus is a subjective synonym of Euomphalus'
- 'Liospira belongs to Liospirinae'
- 'Liospirinae belongs to Raphistomidae'
- 'Liotiinae belongs to Turbinidae'
- 'Lithotrochus belongs to Proconulinae'
- 'Littorina scotoburdigalensis is recombined as Platyceras (Platyostoma) scotoburdigalensis'
- 'Littorinides belongs to Plagiothyridae'
- 'Lodanaria belongs to Murchisoniidae'
- 'Longstaffia belongs to Lophospirinae'
- 'Lophonema belongs to Helicotominae'
- 'Lophospira was reranked as Loxoplocus (Lophospira) and belongs to Loxoplocus'
- 'Lophospiridae belongs to Pleurotomariacea'
- 'Lophospirinae belongs to Lophospiridae'
- 'Loxobucania is a subjective synonym of Bucania'
- 'Loxonema belongs to Loxonematidae'
- 'Rhabdostropha is a subjective synonym of Loxonema'
- 'Loxonematacea belongs to Caenogastropoda'
- 'Loxonematidae belongs to Loxonematacea'
- 'Loxoplocus belongs to Lophospirinae'
- 'Loxotoma belongs to Emarginulinae'
- 'Lucapina belongs to Fissurellinae'
- 'Lucapinella belongs to Fissurellinae'
- 'Luciella belongs to Luciellidae'
- 'Luciellidae belongs to Pleurotomariacea'
- 'Luciellina belongs to Ptychomphalides'
- 'Lytospira belongs to Euomphaloidea'
- 'Maclureadae is corrected as Macluritidae and belongs to Macluritoidea'
- 'Maclurina is a subjective synonym of Maclurites'
- 'Macluritella belongs to Maclureadae'
- 'Maclurites belongs to Maclureadae'
- 'Macluritina belongs to Archaeogastropoda'
- 'Macluritoidea is corrected as Macluritacea and belongs to Macluritina'
- 'Macrocheilus is a subjective synonym of Soleniscus'
- 'Macrochilina is a subjective synonym of Soleniscus'
- 'Macroschisma belongs to Fissurellinae'
- 'Macroschisma (Macroschisma) belongs to Macroschisma' according to Sowerby 1829
- 'Macroschisma (Macroschisma) belongs to Macroschisma'
- 'Marbodeia belongs to Acmaeidae'
- 'Margarites (Atira) was reranked as Atira and belongs to Margaritinae'
- 'Margaritinae belongs to Trochidae'
- 'Mastigospira belongs to Euomphalidae'
- 'Matherella belongs to Onychochilinae'
- 'Matherellina belongs to Onychochilinae'
- 'Meandrella belongs to Tubinidae'
- 'Meandrella sculpta belongs to Meandrella'
- 'Meekospira belongs to Meekospiridae'
- 'Meekospiridae belongs to Subulitacea'
- 'Megalomphala belongs to Bucaniides'
- 'Megatebennus belongs to Fissurellinae'
- 'Megathura belongs to Diodorinae'
- 'Melissosoa is a subjective synonym of Michelia'
- 'Metoptoma belongs to Metoptomatidae'
- 'Metoptomatidae belongs to Patellacea'
- 'Michelia belongs to Murchisoniidae'
- 'Michelia cylindrica belongs to Michelia'
- 'Micrentoma belongs to Murchisoniidae'
- 'Microdoma belongs to Microdomatidae'
- 'Microdomatacea belongs to Trochina'
- 'Microdomatidae belongs to Microdomatacea'
- 'Micromphalus belongs to Euomphalidae'
- 'Microptychis belongs to Pseudozygopleurinae'
- 'Mimospira belongs to Clisospirinae'
- 'Mitchellia is a subjective synonym of Scoliostoma'
- 'Mitrospira is a subjective synonym of Palliseria'
- 'Mogulia is a subjective synonym of Bellerophon'
- 'Mogulia regularis is recombined as Bellerophon regularis'
- 'Montfortia was reranked as Hemitoma (Montfortia) and belongs to Hemitoma'
- 'Montfortia (Montfortista) is reassigned into Hemitoma'
- 'Montfortula belongs to Emarginulinae'
- 'Morania is a subjective synonym of Sinuspira'
- 'Morania vsinuata is recombined as Murchisonia (Sinuspira) vsinuata'
- 'Morphotropis belongs to Oriostomatidae'
- 'Mourlonia belongs to Ptychomphalides'
- 'Trechmannia is a subjective synonym of Euconospira'
- 'Mourlonia (Trechmannia) trochiformis is recombined as Euconospira trochiformis'
- 'Murchisonia belongs to Murchisoniidae'
- 'Murchisonia (Catazone) was reranked as Catazone and belongs to Murchisoniidae'
- 'Murchisonia (Catazone) cuneus is recombined as Catazone cuneus'
- 'Cyrtostropha is a subjective synonym of Murchisonia'
- 'Murchisonia (Diplozone) redux is recombined as Diplozone redux'
- 'Murchisonia (Hormotoma) is reassigned into Murchisonia'
- 'Murchisonia (Hypergonia) is reassigned into Stegocoelia'
- 'Murchisonia (Mesocoelia) was reranked as Mesocoelia and belongs to Murchisoniidae'
- 'Murchisonia (Mesocoelia) janus is recombined as Murchisonia janus'
- 'Murchisonia (Ptychocaulus) was reranked as Ptychocaulus and belongs to Murchisoniidae'
- 'Murchisonia (Stegocoelia) was reranked as Stegocoelia and belongs to Murchisoniidae'
- 'Murchisonia acrea is recombined as Turritoma acrea'
- 'Murchisonia gracilis is recombined as Murchisonia (Hormotoma) gracilis'
- 'Murchisonia maia is recombined as Hormotomina maia'
- 'Murchisonia nieszkowskii is recombined as Ectomaria nieszkowskii'
- 'Murchisonia putilla is recombined as Gasconadia putilla'
- 'Murchisoniacea belongs to Murchisoniina'
- 'Murchisoniidae belongs to Murchisonioidea'
- 'Murchisoniina belongs to Archaeogastropoda'
- 'Nacellinae belongs to Patellidae'
- 'Nannoscutum was reranked as Scutus (Nannoscutum) and belongs to Scutus'
- 'Natica globosa is recombined as Naticopsis globosa'
- 'Naticellina belongs to Platyceratidae'
- 'Naticonema belongs to Platyceratidae'
- 'Naticopsinae belongs to Neritopsidae'
- 'Naticopsis belongs to Naticopsinae'
- 'Naticopsis (Jedria) belongs to Naticopsis'
- 'Naticopsis (Marmolatella) belongs to Naticopsis'
- 'Naticopsis linearis is recombined as Isonema linearis'
- 'Natiria belongs to Craspedostomatidae'
- 'Neilsonia belongs to Neilsoniinae'
- 'Neilsoniinae belongs to Eotomariinae'
- 'Nematotrochus belongs to Holopeinae'
- 'Nematrochus belongs to Planitrochidae'
- 'Neritacea belongs to Neritopsina'
- 'Neritidae belongs to Neritacea'
- 'Neritinae belongs to Neritidae'
- 'Catubrina is a nomen nudum'
- 'Neritopsidae belongs to Neritacea'
- 'Neritopsina belongs to Archaeogastropoda'
- 'Neritopsinae belongs to Neritopsidae'
- 'Neritopsis belongs to Neritopsinae'
- 'Neritoptyx belongs to Neritopsinae'
- 'Nesta was reranked as Zeidora (Nesta) and belongs to Zeidora'
- 'Vetotuba is a subjective synonym of Michelia'
- 'Niso (Vetotuba) brazieri is recombined as Michelia brazieri'
- 'Nodoloxonema belongs to Loxonematidae'
- 'Notomella belongs to Emarginulinae'
- 'Nummocalcar belongs to Euomphalidae'
- 'Odontomaria belongs to Euomphalidae'
- 'Odontoturbo was reranked as Chilodonta (Odontoturbo) and belongs to Chilodonta'
- 'Oelandia pauciplicata is recombined as Latouchella pauciplicata'
- 'Omospira belongs to Omospirinae'
- 'Omospira laticincta belongs to Omospira'
- 'Omospirinae belongs to Raphistomidae'
- 'Omphalocirrus belongs to Maclureadae'
- 'Omphalonema belongs to Gyronematinae'
- 'Omphalotrochidae belongs to Euomphaloidea'
- 'Omphalotrochus belongs to Omphalotrochidae'
- 'Onychochilidae belongs to Macluritacea'
- 'Onychochilinae belongs to Onychochilidae'
- 'Onychochilus belongs to Onychochilidae'
- 'Ophileta belongs to Ophiletinae'
- 'Ophiletina belongs to Helicotominae'
- 'Ophiletinae belongs to Raphistomidae'
- 'Opisthobranchia belongs to Gastropoda'
- 'Orbitestellidae belongs to Trochacea'
- 'Orecopia belongs to Omphalotrochidae'
- 'Oriostoma belongs to Oriostomatidae'
- 'Oriostomatacea belongs to Trochina'
- 'Oriostomatidae belongs to Oriostomatoidea'
- 'Orospira belongs to Helicotominae'
- 'Orthonema belongs to Turritellidae'
- 'Orthonychia was reranked as Platyceras (Orthonychia) and belongs to Platyceras'
- 'Ostlerina is a subjective synonym of Platyostoma'
- 'Ostlerina delicata is recombined as Platyostoma delicata'
- 'Otospira is an objective synonym of Naticonema'
- 'Owenella belongs to Bucaniellinae'
- 'Oxydiscus is an objective synonym of Tropidodiscus'
- 'Oxydiscus (Cyrtodiscus) was reranked as Cyrtodiscus and belongs to Cyrtolitidae'
- 'Joleaudella is a subjective synonym of Tropidodiscus'
- 'Oxydiscus (Joleaudella) mansuyi is recombined as Tropidodiscus mansuyi'
- 'Ozarkina belongs to Archaeogastropoda'
- 'Ozarkispira was reranked as Ophileta (Ozarkispira) and belongs to Ophileta'
- 'Pachyomphalus belongs to Naticopsinae'
- 'Pachystrophia is a subjective synonym of Lesueurilla'
- 'Pagodea belongs to Microdomatidae'
- 'Pagodina belongs to Neilsoniinae'
- 'Pagodispira is a subjective synonym of Donaldiella'
- 'Palaeocapulus is a subjective synonym of Orthonychia'
- 'Palaeomphalus is a subjective synonym of Helicotoma'
- 'Palaeopupa belongs to Onychochilinae'
- 'Palaeoscurria belongs to Metoptomatidae'
- 'Palaeostylus belongs to Pseudozygopleurinae'
- 'Palaeostylus (Palaeostylus) belongs to Palaeostylus'
- 'Palaeotrochacea belongs to Archaeogastropoda'
- 'Palaeotrochidae belongs to Palaeotrochacea'
- 'Palaeotrochus belongs to Palaeotrochidae'
- 'Palaeoturbina is a subjective synonym of Araeonema'
- 'Palaeozyga is a subjective synonym of Palaeozygopleura'
- 'Bojozyga is a subjective synonym of Palaeozygopleura'
- 'Nodozyga is a subjective synonym of Stephanozyga'
- 'Palaeozygopleuridae belongs to Loxonematoidea'
- 'Palliseria belongs to Maclureadae'
- 'Paragalerus belongs to Progalerinae'
- 'Paragoniozona belongs to Phymatopleuridae'
- 'Pararaphistoma belongs to Raphistomatinae'
- 'Paraturbinidae belongs to Palaeotrochacea'
- 'Paraviviana belongs to Helicotominae'
- 'Pareuryalox belongs to Neilsoniinae'
- 'Parmophoridea was reranked as Tugali (Parmophoridea) and belongs to Tugali'
- 'Paromphalus is a subjective synonym of Euomphalus'
- 'Paromphalus mapingensis is recombined as Euomphalus mapingensis'
- 'Patella belongs to Patellinae'
- 'Patellidae belongs to Patellacea'
- 'Patellilabia belongs to Knightitinae'
- 'Patellinae belongs to Patellidae'
- 'Pedasiola belongs to Pterothecinae'
- 'Pedasiola rhenana belongs to Pedasiola'
- 'Pelagiella belongs to Pelagiellidae'
- 'Parapelagiella is a subjective synonym of Pelagiella'
- 'Pelagiellacea belongs to Gastropoda'
- 'Pelagiellidae belongs to Pelagiellacea'
- 'Perneritrochus belongs to Planitrochidae'
- 'Pernotrochus belongs to Ptychomphalides'
- 'Peruvispira belongs to Neilsoniinae'
- 'Phanerotinus belongs to Euomphalidae'
- 'Phanerotrema belongs to Phanerotrematidae'
- 'Phanerotrema welleri is recombined as Glabrocingulum (Ananias) welleri'
- 'Phanerotrematidae belongs to Pleurotomariacea'
- 'Pharetrolites belongs to Bucaniellidae'
- 'Pharkidonotus was reranked as Bellerophon (Pharkidonotus) and belongs to Bellerophon'
- 'Phasianellidae belongs to Trochacea'
- 'Philoxene was reranked as Straparollus (Philoxene) and belongs to Straparollus'
- 'Phragmolites belongs to Tropidodiscinae'
- 'Phragmolites compressus belongs to Phragmolites'
- 'Phragmosphaera belongs to Carinaropsinae'
- 'Phragmosphaera miranda belongs to Phragmosphaera'
- 'Phryx belongs to Symmetrocapulidae'
- 'Phymatifer is a subjective synonym of Euomphalus'
- 'Phymatopleura belongs to Phymatopleuridae'
- 'Phymatopleuridae belongs to Pleurotomariacea'
- 'Pirper belongs to Codonocheilidae'
- 'Pithodea belongs to Pithodeinae'
- 'Pithodeinae belongs to Plethospiridae'
- 'Plagiothyra belongs to Plagiothyridae'
- 'Plagiothyridae belongs to Neritacea'
- 'Planitrochidae belongs to Pseudophoracea'
- 'Planitrochus belongs to Planitrochidae'
- 'Planospirina belongs to Naticopsinae'
- 'Planotectus belongs to Euomphalidae'
- 'Planozone belongs to Planozonides'
- 'Planozonides belongs to Coelozoninae'
- 'Platyacridae belongs to Amberleyacea'
- 'Platybasis belongs to Euomphalidae'
- 'Platyceras belongs to Platyceratidae'
- 'Platyceras (Orthonychia) subrectum is recombined as Orthonychia subrectum'
- 'Platyceras (Platyceras) belongs to Platyceras' according to T.A. Conrad 1840
- 'Platyceratacea belongs to Trochina'
- 'Platyceratidae belongs to Platyceratacea'
- 'Platycerina is a subjective synonym of Platyostoma'
- 'Platyconcha belongs to Streptacididae'
- 'Platyconus belongs to Pleurotomariacea'
- 'Platyloron belongs to Gosseletininae'
- 'Platyostoma was reranked as Platyceras (Platyostoma) and belongs to Platyceras'
- 'Platypleurotomaria is a subjective synonym of Borestus'
- 'Platypleurotomaria planiapicata is recombined as Borestus planiapicata'
- 'Platyschisma belongs to Platyschismatinae'
- 'Platyschismatinae belongs to Sinuopeidae'
- 'Platyteichum belongs to Eotomariides'
- 'Platyworthenia is a subjective synonym of Worthenia'
- 'Platyzona belongs to Pithodeinae'
- 'Plectonotus was reranked as Bucanella (Plectonotus) and belongs to Bucanella'
- 'Plectonotus derbyi is recombined as Bucanella (Plectonotus) derbyi'
- 'Plethospira belongs to Plethospirinae'
- 'Plethospiridae belongs to Murchisoniacea'
- 'Plethospirinae belongs to Plethospiridae'
- 'Pleuromphalus was reranked as Euomphalopterus (Pleuromphalus) and belongs to Euomphalopterus'
- 'Pleuromphalus seductor is recombined as Euomphalopterus seductor'
- 'Pleuronotus belongs to Euomphalidae'
- 'Pleurotoma coralli is recombined as Murchisonia coralli'
- 'Pleurotomaria belongs to Pleurotomariidae'
- 'Pleurotomaria (Biangularia) was reranked as Biangularia and belongs to Murchisoniidae'
- 'Pleurotomaria (Coelozone) was reranked as Coelozone and belongs to Coelozonides'
- 'Pleurotomaria (Conotoma) was reranked as Conotoma and belongs to Coelozonides'
- 'Pleurotomaria (Leptozone) was reranked as Leptozone and belongs to Turbonellininae'
- 'Pleurotomaria (Leptozone) esthetica is recombined as Leptozone esthetica'
- 'Pleurotomaria (Oehlertia) was reranked as Oehlertia and belongs to Ptychomphalides'
- 'Palaeoschisma is a subjective synonym of Clathrospira'
- 'Pleurotomaria (Palaeoschisma) girvanense is recombined as Clathrospira girvanense'
- 'Pleurotomaria (Pleurorima) was reranked as Pleurorima and belongs to Planozonides'
- 'Spiroraphe is a subjective synonym of Eotomaria'
- 'Pleurotomaria (Spiroraphe) bohemica is recombined as Eotomaria bohemica'
- 'Pleurotomaria (Stenoloron) was reranked as Stenoloron and belongs to Gosseletininae'
- 'Pleurotomaria (Stenoloron) viennayi is recombined as Stenoloron viennayi'
- 'Pleurotomaria baltica is recombined as Brachytomaria baltica'
- 'Pleurotomaria radians is recombined as Rhaphistomella radians'
- 'Pleurotomaria robusta is recombined as Ruedemannia robusta'
- 'Pleurotomaria subsinuata is recombined as Amaurotoma subsinuata'
- 'Pleurotomaria trilineata is recombined as Platyzona trilineata'
- 'Pleurotomariacea belongs to Pleurotomariina'
- 'Pleurotomariidae belongs to Pleurotomariacea'
- 'Pleurotomariina belongs to Archaeogastropoda'
- 'Pleurotrochus is a subjective synonym of Microdoma'
- 'Pleurotrochus tricarinatus is recombined as Microdoma tricarinatus'
- 'Poleumita belongs to Euomphaloidea'
- 'Polhemia belongs to Helicotominae'
- 'Polhemia taneyensis belongs to Polhemia'
- 'Polyenaulus is an objective synonym of Maclurites'
- 'Polygyrina belongs to Loxonematidae'
- 'Polyphemopsis is a subjective synonym of Subulites'
- 'Polytremaria belongs to Polytremariidae'
- 'Polytremariinae was reranked as the family Polytremariidae and belongs to Pleurotomariacea'
- 'Polytropina is an objective synonym of Poleumita'
- 'Porcellia belongs to Porcelliidae'
- 'Porcellia (Tremanotus) was reranked as Tremanotus and belongs to Salpingostomatides'
- 'Porcellia (Tremanotus) alpheus is recombined as Tremanotus alpheus'
- 'Porcelliidae belongs to Pleurotomariacea'
- 'Portlockiella belongs to Portlockiellidae'
- 'Portlockiellidae belongs to Pleurotomariacea'
- 'Praenatica was reranked as Platyceras (Praenatica) and belongs to Platyceras'
- 'Procarinaria belongs to Cyrtolitidae'
- 'Procerithiidae belongs to Cerithiacea'
- 'Procerithiopsis belongs to Soleniscinae'
- 'Procerithiopsis ambiguus is corrected as Procerithiopsis ambigua and belongs to Procerithiopsis'
- 'Proconulinae belongs to Trochidae'
- 'Proconulus belongs to Proconulinae'
- 'Procrucibulum belongs to Progalerinae'
- 'Proeccyliopterus is a subjective synonym of Pelagiella'
- 'Progalerinae belongs to Clisospiridae'
- 'Progalerus belongs to Progalerinae'
- 'Promourlonia is a subjective synonym of Mourlonia'
- 'Proscutum was reranked as Scutus (Proscutum) and belongs to Scutus'
- 'Prosobranchia belongs to Gastropoda'
- 'Prosolarium belongs to Luciellidae'
- 'Protocalyptraea belongs to Pseudophoridae'
- 'Protoscaevogyra is a subjective synonym of Pelagiella'
- 'Protospira belongs to Murchisoniidae'
- 'Protospirialis belongs to Holopeinae'
- 'Protowarthia is a subjective synonym of Sinuites'
- 'Proturritella belongs to Trochonematidae'
- 'Pseudeunema is a subjective synonym of Proturritella'
- 'Pseudoclanculus belongs to Chilodontinae'
- 'Pseudocryptaenia belongs to Gosseletininae'
- 'Pseudofissurella belongs to Diodorinae'
- 'Pseudomurchisonia is a subjective synonym of Murchisonia'
- 'Pseudophoracea belongs to Archaeogastropoda'
- 'Pseudophoridae belongs to Pseudophoracea'
- 'Pseudophorus belongs to Pseudophoridae'
- 'Pseudoplagiothyra belongs to Gyronematinae'
- 'Pseudorhytidopilus belongs to Patellinae'
- 'Pseudotectus belongs to Pseudophoridae'
- 'Pseudotectus carinatus belongs to Pseudotectus'
- 'Pseudotubina belongs to Tubinidae'
- 'Pseudozygopleura was reranked as Palaeostylus (Pseudozygopleura) and belongs to Palaeostylus'
- 'Pseudozygopleura (Leptozyga) was reranked as Palaeostylus (Leptozyga) and belongs to Palaeostylus'
- 'Pseudozygopleura (Leptozyga) minuta belongs to Pseudozygopleura (Leptozyga)'
- 'Pyrgozyga is a subjective synonym of Pseudozygopleura'
- 'Pseudozygopleura (Stephanozyga) was reranked as Palaeostylus (Stephanozyga) and belongs to Palaeostylus'
- 'Pseudozygopleurinae was reranked as the family Pseudozygopleuridae and belongs to Loxonematacea'
- 'Pterotheca belongs to Pterothecinae'
- 'Pterotheca bohemica is recombined as Cyclotheca bohemica'
- 'Pterotheca lata belongs to Pterotheca'
- 'Pterothecinae belongs to Bellerophontidae'
- 'Ptomatis belongs to Sinuitinae'
- 'Ptychobellerophon belongs to Bellerophontinae'
- 'Ptychomphalides belongs to Eotomariinae'
- 'Ptychomphalina is a subjective synonym of Mourlonia'
- 'Ptychomphalus belongs to Ptychomphalides'
- 'Ptychonema is a subjective synonym of Lophospira'
- 'Ptychonema nigrum is recombined as Lophospira nigrum'
- 'Ptychosphaera belongs to Bellerophontinae'
- 'Ptychospirina belongs to Platyceratidae'
- 'Ptychozone belongs to Pleurotomarioidea'
- 'Puncturella belongs to Emarginulinae'
- 'Puncturella (Puncturella) belongs to Puncturella'
- 'Puncturellopsis was reranked as Austriacopsis (Puncturellopsis) and belongs to Austriacopsis'
- 'Pupillaea was reranked as Fissurellidea (Pupillaea) and belongs to Fissurellidea'
- 'Pycnomphalus belongs to Anomphalidae'
- 'Pycnotrochus belongs to Platyschismatinae'
- 'Pyramidellacea belongs to Opisthobranchia'
- 'Raphispira belongs to Holopeinae'
- 'Raphispira plena belongs to Raphispira'
- 'Raphistoma belongs to Raphistomatinae'
- 'Raphistoma leiosomella is recombined as Chepultapecia leiosomella'
- 'Raphistomatinae belongs to Raphistomidae'
- 'Raphistomidae is corrected as Raphistomatidae and belongs to Pleurotomariacea'
- 'Raphistomina belongs to Planitrochidae'
- 'Retispira was reranked as Knightites (Retispira) and belongs to Knightites'
- 'Retispira bellireticulata is recombined as Knightites (Retispira) bellireticulata'
- 'Rhabdospira is a subjective synonym of Aclisina'
- 'Rhabdotocochlis belongs to Gyronematinae'
- 'Rhachopea is a subjective synonym of Schizopea'
- 'Rhachopea grandis is recombined as Dirhachopea grandis'
- 'Rhaphischisma belongs to Rhaphischismatidae'
- 'Rhaphischismatidae belongs to Pleurotomariacea'
- 'Rhaphistomella belongs to Eotomariinae'
- 'Rhinoderma is corrected as Rhineoderma and belongs to Turbonellininae'
- 'Rhombella belongs to Luciellidae'
- 'Rhytidopilus belongs to Patellinae'
- 'Rimula belongs to Emarginulinae'
- 'Rimulopsis belongs to Emarginulinae'
- 'Rimulopsis (Rimulopsis) belongs to Rimulopsis' according to Haber 1932
- 'Rimulopsis (Rimulopsis) belongs to Rimulopsis'
- 'Rissoa (Turbonilla) gracilior is recombined as Loxonema gracilior'
- 'Rissoacea belongs to Caenogastropoda'
- 'Rixa was reranked as Puncturella (Rixa) and belongs to Puncturella'
- 'Rotellomphalus is a subjective synonym of Raphistomina'
- 'Rotellomphalus tardus is recombined as Raphistomina tardus'
- 'Rothpletzella belongs to Astraeinae'
- 'Ruedemannia belongs to Ruedemanninae'
- 'Ruedemanniinae belongs to Lophospiridae'
- 'Ruedemanninae belongs to Lophospiridae'
- 'Rufilla belongs to Gosseletininae'
- 'Saffordella is a subjective synonym of Visitator'
- 'Saffordella tennesseensis is recombined as Visitator tennesseensis'
- 'Sallya belongs to Pseudophoridae'
- 'Salpingostoma belongs to Salpingostomatides'
- 'Salpingostomatinae was reranked as the tribe Salpingostomatides and belongs to Bucaniinae'
- 'Scaevogyra belongs to Scaevogyrinae'
- 'Scaevogyrinae belongs to Onychochilidae'
- 'Scaliconus is a subjective synonym of Floyda'
- 'Scalites belongs to Raphistomatinae'
- 'Scalitina belongs to Raphistomatinae'
- 'Scenellopsis belongs to Metazoa'
- 'Schizolopha is a subjective synonym of Lophospira'
- 'Schizolopha textilis is recombined as Lophospira textilis'
- 'Schizopea belongs to Ophiletinae'
- 'Schizostoma is a subjective synonym of Euomphalus'
- 'Scissurellidae belongs to Pleurotomariacea'
- 'Scoliostoma belongs to Codonocheilidae'
- 'Scurriopsis belongs to Acmaeidae'
- 'Scurriopsis (Hennocquia) belongs to Scurriopsis'
- 'Scurriopsis (Scurriopsis) belongs to Scurriopsis'
- 'Scutus belongs to Emarginulinae'
- 'Scutus (Scutus) belongs to Scutus'
- 'Seelya belongs to Plethospirinae'
- 'Semitubina belongs to Tubinidae'
- 'Semperia was reranked as Emarginula (Semperia) and belongs to Emarginula'
- 'Serpularia centrifuga is recombined as Straparollus (Serpulospira) centrifuga'
- 'Serpulospira was reranked as Straparollus (Serpulospira) and belongs to Straparollus'
- 'Shansiella belongs to Portlockiellidae'
- 'Shwedagonia belongs to Ptychomphalides'
- 'Siluriphorus belongs to Pseudophoridae'
- 'Sinistracirsa belongs to Onychochilinae'
- 'Sinospira belongs to Subulitinae'
- 'Sinuella belongs to Bucaniellinae'
- 'Sinuella minuta belongs to Sinuella'
- 'Sinuites belongs to Sinuitinae'
- 'Sinuites (Sinuites) belongs to Sinuites' according to E. Koken 1896
- 'Sinuitidae belongs to Bellerophontacea'
- 'Sinuitina belongs to Bucaniellidae'
- 'Sinuitinae belongs to Sinuitidae'
- 'Sinuitopsis was reranked as Sinuites (Sinuitopsis) and belongs to Sinuites'
- 'Sinuitopsis neglecta belongs to Sinuitopsis'
- 'Sinuopea belongs to Sinuopeinae'
- 'Sinuopeidae belongs to Pleurotomarioidea'
- 'Sinuopeinae belongs to Sinuopeidae'
- 'Sinuspira was reranked as Murchisonia (Sinuspira) and belongs to Murchisonia'
- 'Sinuspira tenera is recombined as Murchisonia (Sinuspira) tenera'
- 'Sinutropis belongs to Euomphaloidea'
- 'Sisenna belongs to Omospirinae'
- 'Smaragdiinae belongs to Neritidae'
- 'Solariella (Eosolariella) was reranked as Eosolariella and belongs to Margaritinae'
- 'Solariellinae belongs to Trochidae'
- 'Solarioconulus belongs to Margaritinae'
- 'Soleniscinae belongs to Subulitidae'
- 'Soleniscus belongs to Soleniscinae'
- 'Soleniscus typicus belongs to Soleniscus'
- 'Solenospira is a subjective synonym of Ectomaria'
- 'Sosiolytes belongs to Anomphalidae'
- 'Spanionema belongs to Procerithiidae'
- 'Sphaerodoma is a subjective synonym of Ianthinopsis'
- 'Sphenosphaera belongs to Salpingostomatides'
- 'Spirina belongs to Craspedostomatidae'
- 'Spiromphalus belongs to Pseudozygopleurinae'
- 'Spiroraphella is a subjective synonym of Mourlonia'
- 'Spiroscala belongs to Ptychomphalides'
- 'Spirotomaria belongs to Pleurotomariacea'
- 'Stachella belongs to Euphemitinae'
- 'Staurospira is a subjective synonym of Holopea'
- 'Stenothecoides belongs to Cambridiidae'
- 'Stephanocosmia (Spiroecus) was reranked as Spiroecus and belongs to Loxonematidae'
- 'Straparella belongs to Anomphalidae'
- 'Straparollina belongs to Holopeinae'
- 'Straparollus belongs to Euomphaloidea'
- 'Straparollus (Straparollus) belongs to Straparollus' according to P.D. de Montfort 1810
- 'Straparollus dionysii belongs to Straparollus'
- 'Strepsodiscus belongs to Cyrtolitidae'
- 'Strepsodiscus major belongs to Strepsodiscus'
- 'Streptacididae belongs to Pyramidellacea'
- 'Streptacis belongs to Streptacididae'
- 'Streptotrochus belongs to Elasmonematidae'
- 'Streptotrochus rugulosus belongs to Streptotrochus'
- 'Strobeus is a subjective synonym of Ianthinopsis'
- 'Strobeus ventricosus is recombined as Ianthinopsis ventricosus'
- 'Stromboli belongs to Diodorinae'
- 'Strophostylus belongs to Platyceratidae'
- 'Strophostylus (Anematina) was reranked as Anematina and belongs to Elasmonematidae'
- 'Stylifer primogenia is recombined as Ianthinopsis primogenia'
- 'Stylonema belongs to Loxonematidae'
- 'Subulitacea belongs to Caenogastropoda'
- 'Subulites belongs to Subulitidae'
- 'Subulitidae belongs to Subulitacea'
- 'Subulitinae belongs to Subulitidae'
- 'Symmetrocapulus belongs to Symmetrocapulidae'
- 'Taeniospira belongs to Ptychomphalides'
- 'Talantodiscus belongs to Porcelliidae'
- 'Taosia was reranked as Stegocoelia (Taosia) and belongs to Stegocoelia'
- 'Tapinotomaria belongs to Portlockiellidae'
- 'Temnodiscus belongs to Tropidodiscinae'
- 'Tetranota belongs to Bucaniides'
- 'Threavia belongs to Holopeinae'
- 'Tmetonema belongs to Pseudozygopleurinae'
- 'Tomoceras is a subjective synonym of Porcellia'
- 'Tortilla is a subjective synonym of Holopea'
- 'Trachybembix belongs to Pleurotomariacea'
- 'Trachydomia belongs to Neritopsinae'
- 'Trachyspira belongs to Neritopsinae'
- 'Transylvanella belongs to Pleurotomariacea'
- 'Tremagyrus is a subjective synonym of Tremanotus'
- 'Tremagyrus scaber is recombined as Tremanotus scaber'
- 'Trepospira belongs to Liospirinae'
- 'Triangularia belongs to Gosseletininae'
- 'Trigyra belongs to Cyrtolitidae'
- 'Trochacea belongs to Trochina'
- 'Trochidae belongs to Trochacea'
- 'Trochina belongs to Archaeogastropoda'
- 'Trochinae belongs to Trochidae'
- 'Trochomphalus belongs to Planitrochidae'
- 'Trochonema belongs to Trochonematidae' according to K.A. von Zittel 1895
- 'Trochonema belongs to Trochonematidae'
- 'Trochonema (Globonema) was reranked as Globonema and belongs to Holopeinae'
- 'Trochonematacea belongs to Pleurotomariina'
- 'Trochonematidae belongs to Trochonematacea'
- 'Trochonemella belongs to Lophospirinae'
- 'Trochonemopsis was reranked as Trochonema (Trochonemopsis) and belongs to Trochonema'
- 'Trochus (Scalaetrochus) was reranked as Scalaetrochus and belongs to Pseudophoridae'
- 'Trochus dentigerus belongs to Trochus' according to d'Orbigny 1843
- 'Trochus dentigerus is recombined as Agathodonta dentigerus'
- 'Trochus nudus is recombined as Solarioconulus nudus'
- 'Tropidocyclus is a subjective synonym of Tropidodiscus'
- 'Tropidocyclus cordiformis is recombined as Sinuitina cordiformis'
- 'Tropidodiscinae belongs to Bellerophontidae'
- 'Tropidodiscus belongs to Tropidodiscinae'
- 'Tropidostropha belongs to Ptychomphalides'
- 'Trypanocochlea belongs to Murchisoniidae'
- 'Trypanotrochus belongs to Proconulinae'
- 'Tuberculopleura anomala is recombined as Microdoma anomala'
- 'Tubina belongs to Tubinidae'
- 'Tubina armata belongs to Tubina'
- 'Tubinidae belongs to Oriostomatacea'
- 'Tubogyra is a subjective synonym of Bucania'
- 'Tubogyra primula is recombined as Bucania primula'
- 'Tubomphalus was reranked as Platyceras (Tubomphalus) and belongs to Platyceras'
- 'Tubomphalus crenistria is recombined as Platyceras (Tubomphalus) crenistria'
- 'Tugali belongs to Emarginulinae'
- 'Tugali (Tugali) belongs to Tugali' according to Gray 1843
- 'Tugali (Tugali) belongs to Tugali'
- 'Turbinidae belongs to Trochacea'
- 'Turbinilopsis belongs to Anomphalidae'
- 'Turbininae belongs to Turbinidae'
- 'Turbinites bicarinatus is recombined as Proturritella bicarinata'
- 'Turbocheilus belongs to Anomphalidae'
- 'Turbomaria belongs to Turbonellininae'
- 'Turbonellina belongs to Turbonellininae'
- 'Turbonellininae belongs to Sinuopeidae'
- 'Turbonitella belongs to Neritopsinae'
- 'Turbonopsis belongs to Palaeotrochidae'
- 'Turritella bilineata is recombined as Murchisonia bilineata'
- 'Turritellidae belongs to Cerithiacea'
- 'Turritoma was reranked as Murchisonia (Turritoma) and belongs to Murchisonia'
- 'Turritospira is a subjective synonym of Turritoma'
- 'Tychonia belongs to Anomphalidae'
- 'Tylotrochus belongs to Proconulinae'
- 'Ulrichospira belongs to Phanerotrematidae'
- 'Umbonellina belongs to Craspedostomatidae'
- 'Umboniidae was reranked as the subfamily Umboniinae and belongs to Trochidae'
- 'Umbospira belongs to Platyschismatinae'
- 'Umbotrochus belongs to Archaeogastropoda'
- 'Umbotrochus aspersus belongs to Umbotrochus'
- 'Umbotropis belongs to Gosseletininae'
- 'Velainellidae belongs to Trochacea'
- 'Ventricaria belongs to Codonocheilidae'
- 'Versispira belongs to Scaevogyrinae'
- 'Virgella belongs to Zygopleuridae'
- 'Visitator was reranked as Platyceras (Visitator) and belongs to Platyceras'
- 'Vistilia belongs to Murchisoniidae'
- 'Viviparidae belongs to Cyclophoracea'
- 'Waagenella is a subjective synonym of Bellerophon'
- 'Warthia belongs to Euphemitinae'
- 'Weeksia belongs to Euomphalidae'
- 'Westerna belongs to Palaeotrochidae'
- 'Wilsoniconcha belongs to Chilodontinae'
- 'Worthenia belongs to Ruedemanninae'
- 'Wortheniopsis belongs to Pithodeinae'
- 'Yunnania belongs to Gyronematinae'
- 'Zeidora belongs to Emarginulinae'
- 'Zeidora (Zeidora) belongs to Zeidora'
- 'Zeidora (Zeidora) belongs to Zeidora' according to A. Adams 1860
- 'Zonidiscus is a subjective synonym of Tropidodiscus'
- 'Zygopleura belongs to Zygopleuridae'
- 'Zygopleuridae belongs to Loxonematacea'