Opinions from G. C. Martin 1904
- 'Actaeon belongs to Acteonidae'
- 'Actaeon calvertensis belongs to Actaeon'
- 'Actaeon ovoides belongs to Actaeon'
- 'Actaeon ovoides belongs to Actaeon' according to Conrad 1830
- 'Actaeon punctostriatus is a subjective synonym of Actaeon shilohensis'
- 'Actaeon shilohensis belongs to Actaeon' according to Whitfield 1894
- 'Actaeon shilohensis belongs to Actaeon'
- 'Acteon melanoides belongs to Acteon' according to Conrad 1830
- 'Acteon melanoides is recombined as Odostomia (Chrysallida) melanoides'
- 'Acteonininae belongs to Tectibranchiata'
- 'Adeorbiidae belongs to Taenioglossa'
- 'Adeorbis supranitidus belongs to Adeorbis' according to Wood 1842
- 'Admete was reranked as Cancellaria (Admete) and belongs to Cancellaria'
- 'Amalthea marylandica belongs to Amalthea'
- 'Amaltheidae belongs to Taenioglossa'
- 'Amycla (Astyris) communis is recombined as Columbella (Astyris) communis'
- 'Amycla (Astyris) communis belongs to Amycla (Astyris)' according to Conrad 1862
- 'Anisocycla was reranked as Eulimella (Anisocycla) and belongs to Eulimella'
- 'Astyris was reranked as Columbella (Astyris) and belongs to Columbella'
- 'Astyris was reranked as Amycla (Astyris) and belongs to Amycla' according to Conrad 1862
- 'Bonellia lineata belongs to Bonellia' according to Conrad 1841
- 'Bonellia lineata is recombined as Niso lineata'
- 'Buccinidae belongs to Rachiglossa'
- 'Buccinofusus belongs to Buccinidae'
- 'Buccinum altile belongs to Buccinum' according to Conrad 1832
- 'Buccinum altile is recombined as Ptychosalpinx altilis'
- 'Buccinum lienosum is recombined as Ptychosalpinx lienosa'
- 'Buccinum lienosum belongs to Buccinum' according to Conrad 1843
- 'Buccinum multirugatum belongs to Buccinum' according to Conrad 1841
- 'Buccinum multirugatum is recombined as Ptychosalpinx multirugatum'
- 'Buccinum porcinum belongs to Buccinum' according to Say 1824
- 'Buccinum porcinum is recombined as Ilyanassa (Paranassa) porcinum'
- 'Buccinum protractum belongs to Buccinum' according to Conrad 1843
- 'Buccinum protractum is recombined as Pisania (Celatoconus) protractum'
- 'Bulla (Bulliopsis) marylandica belongs to Bulla (Bulliopsis)' according to Conrad 1862
- 'Bulla (Bulliopsis) marylandica is recombined as Bulla marylandica'
- 'Bulla acuminata belongs to Bulla' according to Conrad 1830
- 'Bulla acuminata is a subjective synonym of Volvula iota'
- 'Bulla conutus belongs to Bulla' according to Deshayes 1824
- 'Bulla conutus is recombined as Retusa (Cylichnina) conutus'
- 'Bulla subspissa belongs to Bulla' according to Conrad 1848
- 'Bulla subspissa is recombined as Retusa (Cylichnina) subspissa'
- 'Bulliopsis belongs to Nassidae'
- 'Bulliopsis was reranked as Tritia (Bulliopsis) and belongs to Tritia' according to Meek 1864
- 'Bulliopsis was reranked as Bulla (Bulliopsis) and belongs to Bulla' according to Conrad 1862
- 'Bursa centrosa belongs to Bursa' according to Cope 1867
- 'Bursa centrosa is recombined as Tritonium centrosum'
- 'Busycon alveatum is recombined as Fulgur alveatum' according to Conrad 1863
- 'Busycon alveatum is recombined as Fulgur alveatum'
- 'Caecidae belongs to Taenioglossa'
- 'Caecum belongs to Caecidae'
- 'Caecum calvertense belongs to Caecum'
- 'Caecum greensboroense belongs to Caecum'
- 'Caecum patuxentium belongs to Caecum'
- 'Calliostoma belongs to Trochidae'
- 'Calliostoma aphelium belongs to Calliostoma' according to Dall 1892
- 'Calliostoma aphelium belongs to Calliostoma'
- 'Calliostoma calvertanum belongs to Calliostoma'
- 'Calliostoma marylandicum belongs to Calliostoma'
- 'Calliostoma wagneri belongs to Calliostoma' according to Dall 1892
- 'Calliostoma wagneri belongs to Calliostoma'
- 'Calyptraea belongs to Calyptraeidae'
- 'Calyptraea costata belongs to Calyptraea' according to Say 1820
- 'Calyptraea costata is recombined as Crucibulum costatum'
- 'Calyptraea greensboroensis belongs to Calyptraea'
- 'Calyptraeidae belongs to Taenioglossa'
- 'Cancellaria belongs to Pleurotomidae'
- 'Cancellaria (Admete) marylandica belongs to Cancellaria (Admete)'
- 'Cancellaria (Cancellaria) belongs to Cancellaria'
- 'Cancellaria (Sveltia) calvertensis belongs to Cancellaria (Sveltia)'
- 'Cancellaria (Sveltia) patuxentia belongs to Cancellaria (Sveltia)'
- 'Cancellaria alternata belongs to Cancellaria' according to Conrad 1834
- 'Cancellaria alternata is recombined as Cancellaria (Cancellaria) alternata'
- 'Cancellaria biplicifera belongs to Cancellaria' according to Conrad 1841
- 'Cancellaria biplicifera is recombined as Cancellaria (Trigonostoma) biplicifera'
- 'Cancellaria engonata belongs to Cancellaria' according to Conrad 1841
- 'Cancellaria engonata belongs to Cancellaria'
- 'Cancellaria lunata belongs to Cancellaria'
- 'Cancellaria perspectiva belongs to Cancellaria' according to Conrad 1834
- 'Cancellaria perspectiva is recombined as Cancellaria (Trigonostoma) perspectiva'
- 'Cancellaria prunicola belongs to Cancellaria'
- 'Cancellaria reticulatoides belongs to Cancellaria'
- 'Cantharus cumberlandiana belongs to Cantharus' according to Gabb 1860
- 'Cantharus cumberlandiana is recombined as Coralliophila cumberlandiana'
- 'Cassidae belongs to Taenioglossa'
- 'Celatoconus was reranked as Pisania (Celatoconus) and belongs to Pisania'
- 'Cerithiopsidae belongs to Taenioglossa'
- 'Cerithiopsis belongs to Cerithiopsidae'
- 'Cerithiopsis calvertensis belongs to Cerithiopsis'
- 'Cerithium adamsii is recombined as Seila adamsii'
- 'Cerithium unilineatum is recombined as Terebra unilineatum'
- 'Cerithium unilineatum belongs to Cerithium' according to Conrad 1841
- 'Chemnitzia was reranked as Turbonilla (Chemnitzia) and belongs to Turbonilla'
- 'Chemnitzia nivea belongs to Chemnitzia' according to Stimpson 1851
- 'Chemnitzia nivea is recombined as Turbonilla (Chemnitzia) ivea'
- 'Chrysallida was reranked as Odostomia (Chrysallida) and belongs to Odostomia'
- 'Chrysodomus belongs to Buccinidae'
- 'Chrysodomus patuxentensis belongs to Chrysodomus'
- 'Cochliolepis belongs to Umboniidae'
- 'Cochliolepis striata belongs to Cochliolepis' according to Dall 1889
- 'Cochliolepis striata belongs to Cochliolepis'
- 'Columbella belongs to Columbellidae'
- 'Columbella calvertensis belongs to Columbella'
- 'Columbellidae belongs to Rachiglossa'
- 'Conidae belongs to Toxoglossa'
- 'Conus belongs to Conidae'
- 'Conus deluvianus belongs to Conus' according to Green 1830
- 'Conus deluvianus belongs to Conus'
- 'Conus marylandicus belongs to Conus'
- 'Coralliophila belongs to Coralliophilidae'
- 'Coralliophilidae belongs to Rachiglossa'
- 'Crepidula belongs to Calyptraeidae'
- 'Crepidula plana belongs to Crepidula'
- 'Crucibulum belongs to Calyptraeidae'
- 'Ctenobranchiata belongs to Streptoneura'
- 'Cyclostrematidae belongs to Rhipidoglossa'
- 'Cylichna belongs to Scaphandridae'
- 'Cylichna calvertensis belongs to Cylichna'
- 'Cylichna greensboroensis belongs to Cylichna'
- 'Cylichnina was reranked as Retusa (Cylichnina) and belongs to Retusa'
- 'Cymatosyrinx belongs to Pleurotomidae'
- 'Delphinula lipara belongs to Delphinula' according to H. C. Lea 1843
- 'Delphinula lipara is recombined as Teinostoma liparum'
- 'Dispotaea constricta is recombined as Crucibulum constrictum'
- 'Dispotaea multilineatum is recombined as Crucibulum multilineatum'
- 'Dispotaea multilineatum belongs to Dispotaea' according to Conrad 1842
- 'Doliidae belongs to Taenioglossa'
- 'Drillia belongs to Pleurotomidae'
- 'Drillia calvertensis belongs to Drillia'
- 'Drillia elegans belongs to Drillia' according to Whitfield 1894
- 'Drillia elegans is a subjective synonym of Drillia whitfieldi'
- 'Drillia pseudeburnea is corrected as Drillia pseudoeburnea and belongs to Drillia' according to Heilprin 1887
- 'Drillia pseudeburnea is recombined as Pleurotoma pseudeburnea'
- 'Drillia whitfieldi belongs to Drillia'
- 'Ecphora belongs to Purpuridae'
- 'Ecphora tricostata belongs to Ecphora'
- 'Emarginula belongs to Emarginulidae'
- 'Emarginula marylandica belongs to Emarginula'
- 'Emarginulidae was reranked as the family Emarginulinae and belongs to Fissurellidae'
- 'Erato belongs to Cassidae'
- 'Eulima belongs to Eulimidae'
- 'Eulima eborea belongs to Eulima'
- 'Eulima migrans belongs to Eulima' according to Conrad 1846
- 'Eulima migrans belongs to Eulima'
- 'Eulimella belongs to Pyramidellidae'
- 'Eulimella (Anisocycla) marylandica belongs to Eulimella (Anisocycla)'
- 'Eulimidae belongs to Gymnoglossa'
- 'Euthyneura belongs to Gastropoda'
- 'Evalea was reranked as Odostomia (Evalea) and belongs to Odostomia'
- 'Fasciolaria mutabilis is recombined as Scaphella (Aurinia) mutabilis'
- 'Fasciolariidae is corrected as Fasciolaridae and belongs to Rachiglossa'
- 'Fissurella alticosta belongs to Fissurella' according to Conrad 1834
- 'Fissurella alticosta is recombined as Fissuridea alticosta'
- 'Fissurella griscomi is recombined as Fissuridea griscomi'
- 'Fissurella marylandica belongs to Fissurella' according to Conrad 1841
- 'Fissurella marylandica is recombined as Fissuridea marylandica'
- 'Fissurella nassula belongs to Fissurella' according to Conrad 1845
- 'Fissurella nassula is recombined as Fissuridea nassula'
- 'Fissurella redimicula belongs to Fissurella' according to Say 1824
- 'Fissurella redimicula is recombined as Fissuridea redimicula'
- 'Fissurellidae belongs to Zygobranchia'
- 'Fissuridea belongs to Emarginulidae'
- 'Fossaridae belongs to Taenioglossa'
- 'Fossarus belongs to Fossaridae'
- 'Fulgur belongs to Fasciolaridae'
- 'Fulgur coronatus belongs to Fulgur' according to Conrad 1840
- 'Fulgur coronatus is corrected as Fulgur coronatum and belongs to Fulgur'
- 'Fulgur fusiformis belongs to Fulgur' according to Conrad 1840
- 'Fulgur fusiformis is corrected as Fulgur fusiforme and belongs to Fulgur'
- 'Fulgur tuberculatus belongs to Fulgur' according to Conrad 1840
- 'Fulgur tuberculatus is corrected as Fulgur tuberculatum and belongs to Fulgur'
- 'Fusus cinereus belongs to Fusus' according to Say 1822
- 'Fusus cinereus is recombined as Urosalpinx cinereus'
- 'Fusus devexus belongs to Fusus' according to Conrad 1843
- 'Fusus devexus is recombined as Siphonalia devexa'
- 'Fusus migrans belongs to Fusus' according to Conrad 1843
- 'Fusus migrans is recombined as Siphonalia migrans'
- 'Fusus parilis belongs to Fusus' according to Conrad 1832
- 'Fusus parilis is recombined as Buccinofusus parilis'
- 'Fusus quadricostatus belongs to Fusus' according to Conrad 1830
- 'Fusus quadricostatus is recombined as Ecphora quadricostatus'
- 'Fusus rusticus belongs to Fusus' according to Conrad 1839
- 'Fusus rusticus is recombined as Urosalpinx rusticus'
- 'Fusus spiniger belongs to Fusus' according to Conrad 1848
- 'Fusus spiniger is recombined as Fulgur spiniger'
- 'Fusus strumosus belongs to Fusus' according to Conrad 1832
- 'Fusus strumosus is recombined as Scalaspira strumosa'
- 'Fusus tetricus belongs to Fusus' according to Conrad 1832
- 'Fusus tetricus is recombined as Trophon tetricus'
- 'Glyphostoma was reranked as Mangilia (Glyphostoma) and belongs to Mangilia'
- 'Goniobasis marylandica belongs to Goniobasis'
- 'Gymnoglossa was reranked as a superfamily and belongs to Streptodonta'
- 'Hastula was reranked as Terebra (Hastula) and belongs to Terebra'
- 'Hemipleurotoma was reranked as Pleurotoma (Hemipleurotoma) and belongs to Pleurotoma'
- 'Ilyanassa belongs to Nassidae'
- 'Infundibulum centrale is recombined as Calyptraea centralis'
- 'Isapis was reranked as Fossarus (Isapis) and belongs to Fossarus'
- 'Leiotrochus distans belongs to Leiotrochus' according to Conrad 1862
- 'Leiotrochus distans is recombined as Calliostoma distans'
- 'Lirosoma belongs to Fasciolaridae'
- 'Littorina belongs to Littorinidae'
- 'Littorinidae belongs to Taenioglossa'
- 'Lunatia was reranked as Polynices (Lunatia) and belongs to Polynices'
- 'Mangilia belongs to Pleurotomidae'
- 'Mangilia (Glyphostoma) obtusa belongs to Mangilia (Glyphostoma)'
- 'Mangilia parvoidea belongs to Mangilia'
- 'Mangilia patuxentia belongs to Mangilia'
- 'Marginella belongs to Marginellidae'
- 'Marginella calvertensis belongs to Marginella'
- 'Marginella denticulata belongs to Marginella' according to Conrad 1830
- 'Marginella minuta belongs to Marginella' according to Pfeiffer 1840
- 'Marginella perexigua is recombined as Erato perexigua'
- 'Marginella perexigua belongs to Marginella' according to Conrad 1841
- 'Marginellidae belongs to Rachiglossa'
- 'Mitra belongs to Mitridae'
- 'Mitra mariana belongs to Mitra'
- 'Mitridae belongs to Rachiglossa'
- 'Molleria belongs to Cyclostrematidae'
- 'Molleria miniscula belongs to Molleria'
- 'Molleria miniscula belongs to Molleria' according to Dall 1892
- 'Murex belongs to Muricidae'
- 'Murex (Pterorhytis) conradi belongs to Murex (Pterorhytis)'
- 'Murex acuticosta belongs to Murex' according to Conrad 1830
- 'Murex acuticosta is recombined as Typhis acuticosta'
- 'Murex shilohensis belongs to Murex' according to Heilprin 1887
- 'Murex shilohensis is recombined as Muricidea shilohensis'
- 'Murex subulatus is recombined as Cerithiopsis subulata'
- 'Muricidae belongs to Rachiglossa'
- 'Muricidea belongs to Muricidae'
- 'Nassa belongs to Nassidae'
- 'Nassa calvertensis belongs to Nassa'
- 'Nassa greensboroensis belongs to Nassa'
- 'Nassa gubernatoria belongs to Nassa'
- 'Nassa marylandica belongs to Nassa'
- 'Nassa peraltoides belongs to Nassa'
- 'Nassa quadrata belongs to Nassa' according to Conrad 1830
- 'Nassa quadrata is recombined as Bulliopsis quadrata'
- 'Nassa trivittata belongs to Nassa'
- 'Nassidae belongs to Rachiglossa'
- 'Natica duplicatus is recombined as Polynices (Neverita) duplicatus'
- 'Natica fragilis is recombined as Sigaretus fragilis'
- 'Natica hemicrypta belongs to Natica' according to Gabb 1860
- 'Natica hemicrypta is recombined as Polynices (Lunatia) hemicrypta'
- 'Natica heros is recombined as Polynices (Lunatia) heros'
- 'Naticidae belongs to Taenioglossa'
- 'Neverita was reranked as Polynices (Neverita) and belongs to Polynices'
- 'Niso belongs to Eulimidae'
- 'Odostomia belongs to Gymnoglossa'
- 'Odostomia (Evalea) mariana belongs to Odostomia (Evalea)'
- 'Odostomia (Pyrgulina) calvertensis belongs to Odostomia (Pyrgulina)'
- 'Odostomia (Syrnola) marylandica belongs to Odostomia (Syrnola)'
- 'Oliva belongs to Olividae'
- 'Oliva harrisi belongs to Oliva'
- 'Oliva litterata belongs to Oliva' according to Lamarck 1810
- 'Oliva litterata belongs to Oliva'
- 'Olividae belongs to Rachiglossa'
- 'Onoba was reranked as Rissoa (Onoba) and belongs to Rissoa'
- 'Opalia was reranked as Scala (Opalia) and belongs to Scala'
- 'Opisthobranchia was reranked as the order Opisthobranchiata and belongs to Euthyneura'
- 'Orthodonta belongs to Ctenobranchiata'
- 'Ovula iota is recombined as Volvula iota'
- 'Ovula iota belongs to Ovula' according to Conrad 1843
- 'Ovula iota is recombined as Amphiceras iota' according to Conrad 1854
- 'Paranassa was reranked as Ilyanassa (Paranassa) and belongs to Ilyanassa'
- 'Pasithea laevigata belongs to Pasithea' according to H. C. Lea 1843
- 'Pasithea laevigata is recombined as Eulima laevigata'
- 'Patella fornicata is recombined as Crepidula fornicata'
- 'Pisania belongs to Buccinidae'
- 'Pleurotoceratidae belongs to Taenioglossa'
- 'Pleurotoma belongs to Pleurotomidae'
- 'Pleurotoma (Hemipleurotoma) calvertensis belongs to Pleurotoma (Hemipleurotoma)'
- 'Pleurotoma (Hemipleurotoma) choptankensis belongs to Pleurotoma (Hemipleurotoma)'
- 'Pleurotoma albida is recombined as Pleurotoma (Hemipleurotoma) albida'
- 'Pleurotoma bellacrenata belongs to Pleurotoma' according to Conrad 1841
- 'Pleurotoma bellacrenata is recombined as Pleurotoma (Hemipleurotoma) bellacrenata'
- 'Pleurotoma biscatenaria belongs to Pleurotoma' according to Conrad 1834
- 'Pleurotoma biscatenaria is recombined as Surcula biscatenaria'
- 'Pleurotoma communis belongs to Pleurotoma' according to Conrad 1830
- 'Pleurotoma communis is recombined as Pleurotoma (Hemipleurotoma) communis'
- 'Pleurotoma gracilis belongs to Pleurotoma' according to Conrad 1830
- 'Pleurotoma gracilis is a subjective synonym of Drillia incilifera'
- 'Pleurotoma incilifera is recombined as Drillia incilifera'
- 'Pleurotoma incilifera belongs to Pleurotoma' according to Conrad 1834
- 'Pleurotoma limatula belongs to Pleurotoma' according to Conrad 1830
- 'Pleurotoma limatula is recombined as Drillia limatula'
- 'Pleurotoma parva belongs to Pleurotoma' according to Conrad 1830
- 'Pleurotoma parva is recombined as Mangilia parva'
- 'Pleurotoma rotifera belongs to Pleurotoma' according to Conrad 1830
- 'Pleurotoma rotifera is recombined as Surcula rotifera'
- 'Pleurotomidae belongs to Toxoglossa'
- 'Polinices [misspelled as Polynices] belongs to Naticidae'
- 'Ptenoglossa was reranked as a superfamily and belongs to Streptodonta'
- 'Pterorhytis was reranked as Murex (Pterorhytis) and belongs to Murex'
- 'Ptychosalpinx belongs to Buccinidae'
- 'Ptychosalpinx (Tritiaria) peralta belongs to Ptychosalpinx (Tritiaria)' according to Conrad 1868
- 'Ptychosalpinx (Tritiaria) peralta is recombined as Nassa peralta'
- 'Purpuridae belongs to Rachiglossa'
- 'Pyramidellidae belongs to Gymnoglossa'
- 'Pyrgiscus was reranked as Turbonilla (Pyrgiscus) and belongs to Turbonilla'
- 'Pyrgulina was reranked as Odostomia (Pyrgulina) and belongs to Odostomia'
- 'Pyrula belongs to Doliidae'
- 'Pyrula harrisi belongs to Pyrula'
- 'Pyrula sulcosa belongs to Pyrula' according to Conrad 1830
- 'Pyrula sulcosa is recombined as Lirosoma sulcosa'
- 'Rapana tampaensis belongs to Rapana' according to Dall 1890
- 'Rapana tampaensis is recombined as Ecphora tampaensis'
- 'Retusa belongs to Tornatinidae'
- 'Retusa (Cylichnina) marylandica belongs to Retusa (Cylichnina)'
- 'Rhachiglossa belongs to Orthodonta'
- 'Rhipidoglossa belongs to Streptodonta'
- 'Rissoa belongs to Rissoidae'
- 'Rissoa (Onoba) marylandica belongs to Rissoa (Onoba)'
- 'Rissoidae belongs to Taenioglossa'
- 'Rotella nana belongs to Rotella' according to Lea 1833
- 'Rotella nana is recombined as Teinostoma nanum'
- 'Scala belongs to Scalidae'
- 'Scala (Opalia) calvertensis belongs to Scala (Opalia)'
- 'Scala (Opalia) prunicola belongs to Scala (Opalia)'
- 'Scala (Opalia) reticulata belongs to Scala (Opalia)'
- 'Scala marylandica belongs to Scala'
- 'Scala sayana belongs to Scala' according to Dall 1889
- 'Scala sayana belongs to Scala'
- 'Scalaria expansa is recombined as Scala (Sthenorytis) expansa'
- 'Scalaria expansa belongs to Scalaria' according to Conrad 1842
- 'Scalaria pachypleura belongs to Scalaria' according to Conrad 1841
- 'Scalaria pachypleura is recombined as Scala (Sthenorytis) pachypleura'
- 'Scalaspira belongs to Muricidae'
- 'Scalidae belongs to Ptenoglossa'
- 'Scaphandridae belongs to Tetrabranchiata'
- 'Scaphella belongs to Volutidae'
- 'Scaphella (Aurinia) belongs to Scaphella'
- 'Seila belongs to Cerithiopsidae'
- 'Serpula granifera is recombined as Vermetus granifera'
- 'Serpula virginica belongs to Serpula' according to Conrad 1839
- 'Serpula virginica is recombined as Vermetus virginicus'
- 'Sigaretus belongs to Naticidae'
- 'Siphonalia belongs to Buccinidae'
- 'Siphonalia calvertana belongs to Siphonalia'
- 'Siphonalia marylandica belongs to Siphonalia'
- 'Solariidae belongs to Taenioglossa'
- 'Solarium belongs to Taenioglossa'
- 'Solarium amphitermum belongs to Solarium' according to Dall 1892
- 'Solarium amphitermum belongs to Solarium'
- 'Solarium trilineatum belongs to Solarium' according to Conrad 1841
- 'Stenorhytis was reranked as Scala (Sthenorytis) and belongs to Scala' according to Conrad 1863
- 'Streptodonta belongs to Ctenobranchiata'
- 'Streptoneura belongs to Gastropoda'
- 'Surcula engonata belongs to Surcula' according to Conrad 1862
- 'Surcula engonata belongs to Surcula'
- 'Surcula mariana belongs to Surcula'
- 'Surcula marylandica belongs to Surcula' according to Conrad 1841
- 'Surcula marylandica belongs to Surcula'
- 'Surcula rugata belongs to Surcula' according to Conrad 1862
- 'Surcula rugata belongs to Surcula'
- 'Sveltia was reranked as Cancellaria (Sveltia) and belongs to Cancellaria'
- 'Syrnola was reranked as Odostomia (Syrnola) and belongs to Odostomia'
- 'Tachyrhynchus belongs to Turritellidae'
- 'Taenioglossa belongs to Streptodonta'
- 'Tectibranchiata belongs to Opisthobranchiata'
- 'Teinostoma belongs to Umboniidae'
- 'Teinostoma calvertense belongs to Teinostoma'
- 'Teinostoma greensboroense belongs to Teinostoma'
- 'Terebra belongs to Terebridae'
- 'Terebra (Acus) belongs to Terebra' according to Adams 1854
- 'Terebra (Acus) curvilineata belongs to Terebra (Acus)' according to Dall 1895
- 'Terebra (Acus) curvilineata belongs to Terebra (Acus)'
- 'Terebra (Acus) sincera belongs to Terebra (Acus)' according to Dall 1895
- 'Terebra (Acus) sincera belongs to Terebra (Acus)'
- 'Terebra (Hastula) patuxentia belongs to Terebra (Hastula)'
- 'Terebra curvilirata belongs to Terebra' according to Conrad 1843
- 'Terebra curvilirata is recombined as Terebra (Acus) curvilirata'
- 'Terebra inornata belongs to Terebra' according to Whitfield 1894
- 'Terebra inornata is recombined as Terebra (Hastula) inornata'
- 'Terebra simplex belongs to Terebra' according to Conrad 1830
- 'Terebra simplex is recombined as Terebra (Hastula) simplex'
- 'Terebridae belongs to Toxoglossa'
- 'Tornatella pusilla belongs to Tornatella' according to Forbes 1843
- 'Tornatella pusilla is recombined as Actaeon pusilla'
- 'Tornatinidae belongs to Tectibranchiata'
- 'Toxoglossa was reranked as a superfamily and belongs to Orthodonta'
- 'Tragula was reranked as Turbonilla (Tragula) and belongs to Turbonilla'
- 'Trichotropis dalli belongs to Trichotropis' according to Whitfield 1894
- 'Trichotropis dalli is recombined as Fossarus (Isapis) dalli'
- 'Trigonostoma was reranked as Cancellaria (Trigonostoma) and belongs to Cancellaria'
- 'Tritia (Bulliopsis) integra belongs to Tritia (Bulliopsis)' according to Meek 1864
- 'Tritia (Bulliopsis) integra is recombined as Bulliopsis integra'
- 'Tritia trivittatoides belongs to Tritia' according to Whitfield 1894
- 'Tritia trivittatoides is recombined as Nassa trivittatoides'
- 'Tritiaria was reranked as Ptychosalpinx (Tritiaria) and belongs to Ptychosalpinx' according to Conrad 1868
- 'Tritonium belongs to Tritonidae'
- 'Trochidae belongs to Rhipidoglossa'
- 'Trochus apertus is recombined as Calyptraea aperta'
- 'Trochus bellus belongs to Trochus' according to Conrad 1834
- 'Trochus bellus is recombined as Calliostoma bellum'
- 'Trochus conchyliophorus is recombined as Xenophora conchyliophora'
- 'Trochus eboreus belongs to Trochus' according to Wagner 1839
- 'Trochus eboreus is recombined as Calliostoma eboreus'
- 'Trochus humile belongs to Trochus' according to Conrad 1830
- 'Trochus humile is recombined as Calliostoma humile'
- 'Trochus peralveatus belongs to Trochus' according to Conrad 1841
- 'Trochus peralveatus is recombined as Calliostoma peralveatum'
- 'Trochus philanthropus is recombined as Calliostoma philanthropus'
- 'Trochus philanthropus belongs to Trochus' according to Conrad 1834
- 'Trochus reclusus is recombined as Calliostoma reclusus'
- 'Trochus reclusus belongs to Trochus' according to Conrad 1830
- 'Trophon belongs to Muricidae'
- 'Trophon chesapeakeanus belongs to Trophon'
- 'Turbinella demissa belongs to Turbinella' according to Conrad 1834
- 'Turbinella demissa belongs to Turbinella'
- 'Turbo conoideus belongs to Turbo' according to Brocchi 1814
- 'Turbo conoideus is recombined as Odostomia conoidea'
- 'Turbo irroratus belongs to Turbo' according to Say 1822
- 'Turbo irroratus is recombined as Littorina irrorata'
- 'Turbonilla belongs to Pyramidellidae'
- 'Turbonilla (Tragula) gubernatoria belongs to Turbonilla (Tragula)'
- 'Turritella belongs to Turritellidae'
- 'Turritella aequistriata belongs to Turritella' according to Conrad 1863
- 'Turritella indenta belongs to Turritella' according to Conrad 1841
- 'Turritella interrupta belongs to Turritella' according to Totten 1835
- 'Turritella interrupta is recombined as Turbonilla (Pyrgiscus) interrupta'
- 'Turritella perlaqueata belongs to Turritella' according to Conrad 1841
- 'Turritella perlaqueata is recombined as Tachyrhynchus perlaqueata'
- 'Turritella plebeia belongs to Turritella'
- 'Turritella variabilis belongs to Turritella' according to Conrad 1830
- 'Turritellidae belongs to Taenioglossa'
- 'Typhis belongs to Muricidae'
- 'Umboniidae belongs to Rhipidoglossa'
- 'Urosalpinx belongs to Muricidae'
- 'Vermetidae belongs to Taenioglossa'
- 'Vermetus belongs to Vermetidae'
- 'Voluta lamberti belongs to Voluta' according to Morton 1830
- 'Voluta lamberti is a subjective synonym of Scaphella (Aurinia) mutabilis'
- 'Voluta obtusa is recombined as Scaphella (Aurinia) obtusa'
- 'Voluta solitaria belongs to Voluta' according to Conrad 1830
- 'Voluta solitaria is recombined as Scaphella solitaria'
- 'Voluta trenholmii is recombined as Scaphella trenholmii'
- 'Volutidae belongs to Rachiglossa'
- 'Volutifusus typus belongs to Volutifusus' according to Conrad 1866
- 'Volutifusus typus is recombined as Scaphella (Aurinia) typus'
- 'Volvula belongs to Tornatinidae'
- 'Xenophora belongs to Xenophoridae'
- 'Xenophoridae belongs to Taenioglossa'
- 'Zizyphinus virginicum belongs to Zizyphinus' according to Conrad 1875
- 'Zizyphinus virginicum is recombined as Calliostoma virginicum'
- 'Zygobranchia belongs to Streptodonta'