Opinions from L. C. Glenn 1904
- 'Abra belongs to Semelidae'
- 'Abra marylandica belongs to Abra'
- 'Adesmacea belongs to Teleodesmacea'
- 'Aligena belongs to Leptonidae'
- 'Aligena pustulosa belongs to Aligena' according to Dall 1898
- 'Aligena pustulosa belongs to Aligena'
- 'Amphidesma aequata belongs to Amphidesma' according to Conrad 1843
- 'Amphidesma aequata is recombined as Aligena aequata'
- 'Amphidesma carinata belongs to Amphidesma' according to Conrad 1830
- 'Amphidesma carinata is recombined as Semele carinata'
- 'Amphidesma subovata belongs to Amphidesma' according to Say 1824
- 'Amphidesma subovata is recombined as Semele subovata'
- 'Amussium was reranked as Pecten (Amusium) and belongs to Pecten'
- 'Anadara was reranked as Scapharca (Anadara) and belongs to Scapharca' according to Dall 1898
- 'Anatinacea belongs to Anomalodesmacea'
- 'Angulus was reranked as Tellina (Angulus) and belongs to Tellina'
- 'Anomalodesmacea belongs to Pelecypoda'
- 'Anomia belongs to Anomiidae'
- 'Anomia aculeata belongs to Anomia'
- 'Anomia simplex belongs to Anomia'
- 'Anomiacea belongs to Prionodesmacea'
- 'Anomiidae belongs to Anomiacea'
- 'Antigona was reranked as Cytherea (Antigona) and belongs to Cytherea'
- 'Arca belongs to Arcinae'
- 'Arca (Scapharca) elnia belongs to Arca (Scapharca)'
- 'Arca arata belongs to Arca' according to Say 1824
- 'Arca arata is recombined as Arca (Scapharca) arata'
- 'Arca centenaria belongs to Arca' according to Say 1824
- 'Arca centenaria is recombined as Arca (Barbatia) centenaria'
- 'Arca idonea belongs to Arca' according to Conrad 1832
- 'Arca idonea is recombined as Arca (Scapharca) idonea'
- 'Arca incile belongs to Arca' according to Say 1824
- 'Arca incile is recombined as Arca (Noetia) incile'
- 'Arca staminea belongs to Arca' according to Say 1832
- 'Arca staminea is recombined as Arca (Scapharca) staminea'
- 'Arca subrostrata belongs to Arca' according to Conrad 1841
- 'Arca subrostrata is recombined as Arca (Scapharca) subrostrata'
- 'Arcacea belongs to Prionodesmacea'
- 'Arcidae belongs to Arcacea'
- 'Arcinae belongs to Arcidae'
- 'Artemis acetabulum is recombined as Dosinia acetabulum'
- 'Asaphis belongs to Psammobiidae'
- 'Ashtarotha was reranked as Astarte (Ashtarotha) and belongs to Astarte' according to Dall 1903
- 'Astartacea belongs to Teleodesmacea'
- 'Astarte (Ashtarotha) parma belongs to Astarte (Ashtarotha)' according to Dall 1903
- 'Astarte calvertensis belongs to Astarte'
- 'Astarte castrana belongs to Astarte'
- 'Astarte cuneiformis belongs to Astarte' according to Conrad 1840
- 'Astarte cuneiformis belongs to Astarte'
- 'Astarte obruta belongs to Astarte' according to Conrad 1834
- 'Astarte perplana belongs to Astarte' according to Conrad 1840
- 'Astarte perplana belongs to Astarte'
- 'Astarte symmetrica belongs to Astarte' according to Conrad 1834
- 'Astarte symmetrica belongs to Astarte'
- 'Astarte thisphila belongs to Astarte'
- 'Astarte thomasii belongs to Astarte' according to Conrad 1855
- 'Astarte thomasii belongs to Astarte'
- 'Atrina belongs to Pinnidae'
- 'Atrina harrisii belongs to Atrina' according to Dall 1898
- 'Atrina harrisii belongs to Atrina'
- 'Atrina piscatoria belongs to Atrina'
- 'Barbatia was reranked as Arca (Barbatia) and belongs to Arca'
- 'Barnea belongs to Pholadinae'
- 'Bornia belongs to Leptonidae'
- 'Bornia depressa belongs to Bornia'
- 'Bornia marylandica belongs to Bornia'
- 'Byssoarca marylandica belongs to Byssoarca' according to Conrad 1840
- 'Byssoarca marylandica is recombined as Arca (Barbatia) marylandica'
- 'Callocardia belongs to Meretricinae'
- 'Callocardia (Agriopoma) belongs to Callocardia'
- 'Callocardia (Agriopoma) prunensis belongs to Callocardia (Agriopoma)'
- 'Capulus lugubris belongs to Capulus' according to Conrad 1834
- 'Cardiacea belongs to Teleodesmacea'
- 'Cardiidae belongs to Cardiacea'
- 'Cardita belongs to Carditidae'
- 'Carditamera protracta is recombined as Cardita protracta'
- 'Carditidae belongs to Carditacea'
- 'Cardium belongs to Cardiidae'
- 'Cardium (Cerastoderma) calvertensium belongs to Cardium (Cerastoderma)'
- 'Cardium (Cerastoderma) patuxentium belongs to Cardium (Cerastoderma)'
- 'Cardium craticuloides belongs to Cardium' according to Conrad 1845
- 'Cardium craticuloides is recombined as Cardium (Cerastoderma) craticuloides'
- 'Cardium leptopleura belongs to Cardium' according to Conrad 1841
- 'Cardium leptopleura is recombined as Cardium (Cerastoderma) leptopleura'
- 'Cardium medium is recombined as Cardium (Fragum) medium'
- 'Cardium mortoni belongs to Cardium' according to Conrad 1831
- 'Cardium mortoni is recombined as Cardium (Laevicardium) mortoni'
- 'Cellepora informata belongs to Cellepora' according to Lonsdale 1845
- 'Cellepora massalis belongs to Cellepora'
- 'Cellepora umbilicata belongs to Cellepora' according to Lonsdale 1845
- 'Cerastoderma was reranked as Cardium (Cerastoderma) and belongs to Cardium'
- 'Chama belongs to Chamidae'
- 'Chama congregata belongs to Chama'
- 'Chamacea belongs to Teleodesmacea'
- 'Chamidae belongs to Chamacea'
- 'Chione belongs to Venerinae'
- 'Chione parkeria belongs to Chione'
- 'Chlamys was reranked as Pecten (Chlamys) and belongs to Pecten'
- 'Clementia belongs to Dosiniinae'
- 'Clidiophora was reranked as Pandora (Clidiophora) and belongs to Pandora'
- 'Corbula belongs to Corbulidae'
- 'Corbula elevata belongs to Corbula' according to Conrad 1838
- 'Corbula elevata belongs to Corbula'
- 'Corbula idonea belongs to Corbula' according to Conrad 1833
- 'Corbula idonea belongs to Corbula'
- 'Corbula inaequalis belongs to Corbula' according to Say 1824
- 'Corbula inaequalis belongs to Corbula'
- 'Corbulidae belongs to Myacea'
- 'Crassatella marylandica belongs to Crassatella' according to Conrad 1832
- 'Crassatella marylandica is recombined as Crassatellites marylandicus'
- 'Crassatella melina belongs to Crassatella' according to Conrad 1832
- 'Crassatella melina is recombined as Crassatellites melina'
- 'Crassatella turgidula is recombined as Crassatellites turgidulus'
- 'Crassatella undulata belongs to Crassatella' according to Say 1824
- 'Crassatella undulata is recombined as Crassatellites undulatus'
- 'Crassatellites belongs to Crassatellitidae'
- 'Crassatellites (Crassinella) duplinianus belongs to Crassatellites (Crassinella)'
- 'Crassatellites (Crassinella) duplinianus belongs to Crassatellites (Crassinella)' according to Dall 1903
- 'Crassatellitidae belongs to Astartacea'
- 'Crassinella was reranked as Crassatellites (Crassinella) and belongs to Crassatellites'
- 'Crenella belongs to Mytilidae'
- 'Crenella gubernatoria belongs to Crenella'
- 'Crenella virida belongs to Crenella'
- 'Crisina striatopora belongs to Crisina'
- 'Cumingia belongs to Semelidae'
- 'Cumingia medialis belongs to Cumingia' according to Conrad 1866
- 'Cumingia medialis belongs to Cumingia'
- 'Cytherea belongs to Meretricinae'
- 'Cytherea marylandica belongs to Cytherea' according to Conrad 1833
- 'Cytherea marylandica is recombined as Macrocallista marylandica'
- 'Cytherea sayana is recombined as Callocardia (Agriopoma) sayana'
- 'Cytherea staminea belongs to Cytherea' according to Conrad 1838
- 'Cytherea staminea is recombined as Cytherea (Antigona) staminea'
- 'Cytherea subnasuta belongs to Cytherea' according to Conrad 1841
- 'Cytherea subnasuta is recombined as Callocardia (Agriopoma) subnasuta'
- 'Dicranodesma was reranked as Thecodonta (Dicranodesma) and belongs to Thecodonta'
- 'Diplodonta belongs to Diplodontidae'
- 'Diplodonta shilohensis belongs to Diplodonta' according to Dall 1900
- 'Diplodonta shilohensis belongs to Diplodonta'
- 'Divaricella belongs to Lucinidae'
- 'Dosinia belongs to Dosiniinae'
- 'Dosiniinae belongs to Veneridae'
- 'Ensis belongs to Solenidae'
- 'Eriphyla galvestonensis is recombined as Crassatellites (Crassinella) galvestonensis'
- 'Eriphyla galvestonensis belongs to Eriphyla' according to Harris 1895
- 'Ervilia belongs to Erviliinae'
- 'Ervilia planata belongs to Ervilia' according to Dall 1898
- 'Ervilia planata belongs to Ervilia'
- 'Erviliinae belongs to Mesodesmatidae'
- 'Erycina belongs to Leptonidae'
- 'Erycina (Pseudopythina) americana belongs to Erycina (Pseudopythina)' according to Dall 1900
- 'Erycina (Pseudopythina) americana belongs to Erycina (Pseudopythina)'
- 'Erycina calvertensis belongs to Erycina'
- 'Erycina marylandica belongs to Erycina'
- 'Erycina pruna belongs to Erycina'
- 'Erycina rickardia belongs to Erycina'
- 'Erycina speciosa belongs to Erycina'
- 'Fragum was reranked as Cardium (Fragum) and belongs to Cardium'
- 'Galeommatidae belongs to Leptonacea'
- 'Glycymeris belongs to Pectunculinae'
- 'Gregariella belongs to Mytilidae'
- 'Hemimactra was reranked as Spisula (Hemimactra) and belongs to Spisula'
- 'Hindsiella belongs to Sportellidae'
- 'Hindsiella acuta belongs to Hindsiella' according to Dall 1900
- 'Hydractinia multispinosa belongs to Hydractinia'
- 'Isocardia belongs to Isocardiidae'
- 'Isocardia fraterna belongs to Isocardia' according to Say 1824
- 'Isocardia fraterna belongs to Isocardia'
- 'Isocardia ignolea belongs to Isocardia'
- 'Isocardia markoei belongs to Isocardia' according to Conrad 1842
- 'Isocardia markoei belongs to Isocardia'
- 'Isocardia mazlea belongs to Isocardia'
- 'Isocardiacea belongs to Teleodesmacea'
- 'Kelletia is corrected as Kellia and belongs to Leptonidae'
- 'Kellia rotundula belongs to Kellia'
- 'Kellia triangula is recombined as Bornia triangula'
- 'Kennerlia was reranked as Pandora (Kennerleyia) and belongs to Pandora'
- 'Labiosa belongs to Mactrinae'
- 'Laevicardium was reranked as Cardium (Laevicardium) and belongs to Cardium'
- 'Leda belongs to Ledidae'
- 'Ledidae belongs to Nuculacea'
- 'Lepton mactroides belongs to Lepton' according to Conrad 1834
- 'Lepton mactroides is recombined as Bornia mactroides'
- 'Leptonacea belongs to Teleodesmacea'
- 'Leptonidae belongs to Leptonacea'
- 'Lima belongs to Limidae'
- 'Lima papyria belongs to Lima' according to Conrad 1841
- 'Lima papyria belongs to Lima'
- 'Limidae belongs to Pectinacea'
- 'Lithophaga belongs to Mytilidae'
- 'Lithophaga subalveata belongs to Lithophaga' according to Conrad 1866
- 'Lithophaga subalveata belongs to Lithophaga'
- 'Lucina (Here) is reassigned into Phacoides'
- 'Lucina acclinis belongs to Lucina' according to Conrad 1832
- 'Lucina acclinis is recombined as Diplodonta acclinis'
- 'Lucina anodonta belongs to Lucina' according to Say 1824
- 'Lucina anodonta is recombined as Phacoides (Pseudomiltha) anodonta'
- 'Lucina contracta belongs to Lucina' according to Say 1824
- 'Lucina contracta is recombined as Phacoides (Lucinoma) contracta'
- 'Lucina crenulata is recombined as Phacoides (Parvilucina) crenulata'
- 'Lucina crenulata belongs to Lucina' according to Conrad 1840
- 'Lucina cribraria is recombined as Phacoides (Lucinisca) cribraria'
- 'Lucina foremani belongs to Lucina' according to Conrad 1841
- 'Lucina foremani is recombined as Phacoides (Pseudomiltha) foremani'
- 'Lucina quadrisulcata belongs to Lucina' according to d'Orbigny 1846
- 'Lucina quadrisulcata is recombined as Divaricella quadrisulcata'
- 'Lucina trisulcata is recombined as Phacoides (Here) trisulcata'
- 'Lucinacea belongs to Teleodesmacea'
- 'Lucinidae belongs to Lucinacea'
- 'Lucinisca was reranked as Phacoides (Lucinisca) and belongs to Phacoides'
- 'Lucinoma was reranked as Phacoides (Lucinoma) and belongs to Phacoides'
- 'Lunulites denticulata belongs to Lunulites' according to Conrad 1841
- 'Macoma belongs to Tellinidae'
- 'Macoma marylandica belongs to Macoma'
- 'Macrocallista belongs to Meretricinae'
- 'Mactra belongs to Mactrinae'
- 'Mactra clathrodon belongs to Mactra' according to Lea 1833
- 'Mactra clathrodon belongs to Mactra'
- 'Mactra confraga belongs to Mactra' according to Conrad 1833
- 'Mactra confraga is recombined as Spisula (Hemimactra) confraga'
- 'Mactra delumbis belongs to Mactra' according to Conrad 1832
- 'Mactra delumbis is recombined as Spisula (Hemimactra) delumbis'
- 'Mactra subparilis belongs to Mactra' according to Conrad 1841
- 'Mactra subparilis is recombined as Spisula (Hemimactra) subparilis'
- 'Mactra subponderosa belongs to Mactra' according to d'Orbigny 1852
- 'Mactra subponderosa is recombined as Spisula (Hemimactra) subponderosa'
- 'Mactracea belongs to Teleodesmacea'
- 'Mactridae belongs to Mactracea'
- 'Mactrinae belongs to Mactridae'
- 'Margaritaria belongs to Pholadomyacidae'
- 'Martesia belongs to Pholadinae'
- 'Melina belongs to Melinidae'
- 'Melinidae belongs to Pteriacea'
- 'Mercenaria plena is recombined as Venus plena'
- 'Meretricinae belongs to Veneridae'
- 'Mesodesma belongs to Mesodesmatinae'
- 'Mesodesma mariana belongs to Mesodesma'
- 'Mesodesmatidae belongs to Mactracea'
- 'Mesodesmatinae belongs to Mesodesmatidae'
- 'Metis belongs to Tellinidae'
- 'Modiola is corrected as Modiolus and belongs to Mytilidae'
- 'Modiolaria belongs to Mytilidae'
- 'Modiolaria curta belongs to Modiolaria'
- 'Modiolaria virginica belongs to Modiolaria' according to Conrad 1867
- 'Modiolaria virginica is recombined as Modiolus virginicus'
- 'Modiolus dalli belongs to Modiolus'
- 'Modiolus ducatelii belongs to Modiolus' according to Conrad 1840
- 'Modiolus ducatelii belongs to Modiolus'
- 'Modiolus ionensis belongs to Modiolus'
- 'Montacuta belongs to Leptonidae'
- 'Montacuta mariana belongs to Montacuta' according to Dall 1900
- 'Montacuta mariana belongs to Montacuta'
- 'Mya belongs to Myacidae'
- 'Mya arctica belongs to Mya' according to C. Linnaeus 1767
- 'Mya arctica is recombined as Saxicava arctica'
- 'Mya producta belongs to Mya' according to Conrad 1838
- 'Mya producta belongs to Mya'
- 'Myacea belongs to Teleodesmacea'
- 'Myacidae belongs to Myacea'
- 'Myalina subovata belongs to Myalina' according to Conrad 1845
- 'Myalina subovata is recombined as Paramya subovata'
- 'Myoconcha incurva belongs to Myoconcha' according to Conrad 1839
- 'Myoconcha incurva is recombined as Mytilus (Mytiloconcha) incurva'
- 'Mytilacea [misspelled as Mytilaeea] belongs to Prionodesmacea'
- 'Mytilidae belongs to Mytilaeea'
- 'Mytiloconcha was reranked as Mytilus (Mytiloconcha) and belongs to Mytilus'
- 'Mytilus belongs to Mytilidae'
- 'Mytilus conradinus belongs to Mytilus' according to d'Orbigny 1852
- 'Mytilus conradinus belongs to Mytilus'
- 'Noetia was reranked as Arca (Noetia) and belongs to Arca'
- 'Nucula belongs to Nuculidae'
- 'Nucula concentrica belongs to Nucula' according to Say 1824
- 'Nucula concentrica is recombined as Leda concentrica'
- 'Nucula laevis belongs to Nucula' according to Say 1824
- 'Nucula laevis is recombined as Yoldia laevis'
- 'Nucula liciata belongs to Nucula' according to Conrad 1843
- 'Nucula liciata is recombined as Leda liciata'
- 'Nucula proxima belongs to Nucula'
- 'Nucula prunicola belongs to Nucula' according to Dall 1898
- 'Nucula sinaria belongs to Nucula' according to Dall 1898
- 'Nucula taphria belongs to Nucula' according to Dall 1898
- 'Nucula taphria belongs to Nucula'
- 'Nuculacea belongs to Prionodesmacea'
- 'Nuculidae belongs to Nuculacea'
- 'Ostrea carolinensis belongs to Ostrea' according to Conrad 1832
- 'Ostrea carolinensis belongs to Ostrea'
- 'Ostrea percrassa belongs to Ostrea' according to Conrad 1840
- 'Ostrea percrassa belongs to Ostrea'
- 'Ostrea thomasii belongs to Ostrea' according to Conrad 1867
- 'Ostrea thomasii is a subjective synonym of Ostrea sellaeformis'
- 'Ostrea trigonalis belongs to Ostrea'
- 'Ostreacea [misspelled as Ostracea] belongs to Prionodesmacea'
- 'Ostreidae belongs to Ostracea'
- 'Palmicellaria convoluta belongs to Palmicellaria'
- 'Palmicellaria punctata belongs to Palmicellaria'
- 'Pandora belongs to Pandoridae'
- 'Pandora (Kennerleyia) lata belongs to Pandora (Kennerleyia)' according to Dall 1903
- 'Pandora (Kennerleyia) lata belongs to Pandora (Kennerleyia)'
- 'Pandora crassidens belongs to Pandora' according to Conrad 1838
- 'Pandora crassidens is recombined as Pandora (Clidiophora) crassidens'
- 'Pandoridae belongs to Anatinacea'
- 'Panopaea americana belongs to Panopaea' according to Conrad 1838
- 'Panopaea americana is recombined as Panopea americana'
- 'Panope is corrected as Panopea and belongs to Saxicavidae'
- 'Panopea dubia belongs to Panopea' according to H. C. Lea 1845
- 'Panopea dubia is recombined as Sphenia dubia'
- 'Panopea goldfussii belongs to Panopea' according to Wagner 1839
- 'Panopea goldfussii belongs to Panopea'
- 'Panopea whitfieldi belongs to Panopea' according to Dall 1898
- 'Panopea whitfieldi belongs to Panopea'
- 'Paramya belongs to Myacidae'
- 'Pecten belongs to Pectinidae'
- 'Pecten (Chlamys) coccymelus belongs to Pecten (Chlamys)'
- 'Pecten (Pecten) belongs to Pecten'
- 'Pecten cerinus belongs to Pecten' according to Conrad 1869
- 'Pecten cerinus is recombined as Pecten (Pseudamusium) cerinus'
- 'Pecten clintonius is recombined as Pecten (Chlamys) clintonius'
- 'Pecten humphreysii is recombined as Pecten (Pecten) humphreysii'
- 'Pecten jeffersonius is recombined as Pecten (Chlamys) jeffersonius'
- 'Pecten madisonius is recombined as Pecten (Chlamys) madisonius'
- 'Pecten marylandicus is recombined as Pecten (Chlamys) marylandicus'
- 'Pecten mortoni is recombined as Pecten (Amusium) mortoni'
- 'Pecten rogersii belongs to Pecten' according to Conrad 1834
- 'Pecten rogersii is recombined as Pecten (Chlamys) rogersii'
- 'Pectinacea belongs to Prionodesmacea'
- 'Pectinidae belongs to Pectinacea'
- 'Pectunculinae belongs to Arcidae'
- 'Pectunculus parilis belongs to Pectunculus' according to Conrad 1843
- 'Pectunculus parilis is recombined as Glycymeris parilis'
- 'Pectunculus subovata belongs to Pectunculus' according to Say 1824
- 'Pectunculus subovata is recombined as Glycymeris subovata'
- 'Periploma belongs to Periplomatidae'
- 'Periploma peralta belongs to Periploma' according to Conrad 1863
- 'Periploma peralta belongs to Periploma'
- 'Periplomatidae belongs to Anatinacea'
- 'Perna maxillata belongs to Perna' according to Lamarck 1819
- 'Perna maxillata is recombined as Melina maxillata'
- 'Petricola belongs to Petricolidae'
- 'Petricola (Rupellaria) harrisii belongs to Petricola (Rupellaria)' according to Dall 1898
- 'Petricola (Rupellaria) harrisii is recombined as Petricola harrisii'
- 'Petricola calvertensis belongs to Petricola' according to Dall 1900
- 'Petricola calvertensis belongs to Petricola'
- 'Petricola centenaria belongs to Petricola' according to Conrad 1833
- 'Petricola centenaria is recombined as Asaphis centenaria'
- 'Petricolidae belongs to Veneracea'
- 'Phacoides belongs to Lucinidae'
- 'Phacoides (Parvilucina) belongs to Phacoides'
- 'Phacoides (Parvilucina) prunus belongs to Phacoides (Parvilucina)' according to Dall 1903
- 'Phacoides (Parvilucina) prunus belongs to Phacoides (Parvilucina)'
- 'Pholadidae belongs to Adesmacea'
- 'Pholadinae belongs to Pholadidae'
- 'Pholadomya abrupta belongs to Pholadomya' according to Conrad 1832
- 'Pholadomya abrupta is recombined as Margaritaria abrupta'
- 'Pholadomyacidae belongs to Anatinacea'
- 'Pholas belongs to Pholadinae'
- 'Pholas arcuata belongs to Pholas' according to Conrad 1841
- 'Pholas ovalis belongs to Pholas' according to Say 1820
- 'Pholas ovalis is recombined as Martesia ovalis'
- 'Pholas producta belongs to Pholas' according to Conrad 1863
- 'Pholas producta is recombined as Pholas (Thovana) producta'
- 'Pinnidae belongs to Pteriacea'
- 'Plicatula belongs to Spondylidae'
- 'Plicatula densata belongs to Plicatula'
- 'Prionodesmacea belongs to Pelecypoda'
- 'Psammobia belongs to Psammobiidae'
- 'Psammobia gubernatoria belongs to Psammobia'
- 'Psammobiidae belongs to Tellinacea'
- 'Pseudamusium was reranked as Pecten (Pseudamusium) and belongs to Pecten'
- 'Pseudomiltha was reranked as Phacoides (Pseudomiltha) and belongs to Phacoides'
- 'Pseudopythina was reranked as Erycina (Pseudopythina) and belongs to Erycina'
- 'Pteriacea belongs to Prionodesmacea'
- 'Raeta was reranked as Labiosa (Raeta) and belongs to Labiosa'
- 'Retepora doverensis belongs to Retepora'
- 'Rupellaria was reranked as Petricola (Rupellaria) and belongs to Petricola' according to Dall 1898
- 'Saxicava belongs to Saxicavidae'
- 'Saxicavidae belongs to Myacea'
- 'Scapharca was reranked as Arca (Scapharca) and belongs to Arca'
- 'Scapharca (Anadara) clisea belongs to Scapharca (Anadara)' according to Dall 1898
- 'Scapharca (Anadara) clisea is recombined as Arca (Scapharca) clisea'
- 'Schizoporella doverensis belongs to Schizoporella'
- 'Scutella aberti belongs to Scutella' according to Conrad 1842
- 'Semele belongs to Semelidae'
- 'Semelidae belongs to Tellinacea'
- 'Solecardia belongs to Galeommatidae'
- 'Solecardia (Spaniorinus) cossmanni belongs to Solecardia (Spaniorinus)'
- 'Solecardia (Spaniorinus) cossmanni belongs to Solecardia (Spaniorinus)' according to Dall 1900
- 'Solen directus is recombined as Ensis directus'
- 'Solen ensiformis belongs to Solen' according to Conrad 1843
- 'Solen ensiformis is recombined as Ensis ensiformis'
- 'Solenacea belongs to Teleodesmacea'
- 'Solenidae belongs to Solenacea'
- 'Spaniorinus was reranked as Solecardia (Spaniorinus) and belongs to Solecardia'
- 'Spatangus orthonotus belongs to Spatangus' according to Conrad 1843
- 'Sphaerella subvexa belongs to Sphaerella' according to Conrad 1838
- 'Sphaerella subvexa is recombined as Diplodonta subvexa'
- 'Sphenia belongs to Myacidae'
- 'Spisula belongs to Mactrinae'
- 'Spisula (Hemimactra) chesapeakensis belongs to Spisula (Hemimactra)'
- 'Spisula (Hemimactra) curtidens belongs to Spisula (Hemimactra)' according to Dall 1898
- 'Spisula (Hemimactra) curtidens belongs to Spisula (Hemimactra)'
- 'Spisula (Hemimactra) marylandica belongs to Spisula (Hemimactra)' according to Dall 1898
- 'Spondylidae belongs to Pectinacea'
- 'Sportella belongs to Sportellidae'
- 'Sportella patuxentia belongs to Sportella'
- 'Sportella pelex belongs to Sportella' according to Dall 1900
- 'Sportella pelex belongs to Sportella'
- 'Sportella petropolitana belongs to Sportella' according to Dall 1900
- 'Sportella petropolitana belongs to Sportella'
- 'Sportella recussa belongs to Sportella'
- 'Sportella whitfieldi belongs to Sportella' according to Dall 1900
- 'Sportella whitfieldi belongs to Sportella'
- 'Sportellidae belongs to Leptonacea'
- 'Teleodesmacea belongs to Pelecypoda'
- 'Tellina belongs to Tellinidae'
- 'Tellina (Angulus) dupliniana belongs to Tellina (Angulus)'
- 'Tellina aequistriata belongs to Tellina'
- 'Tellina biplicata belongs to Tellina' according to Conrad 1834
- 'Tellina biplicata is recombined as Metis biplicata'
- 'Tellina declivis is recombined as Tellina (Angulus) declivis'
- 'Tellina divaricata belongs to Tellina' according to Dillwyn 1817
- 'Tellina lenis belongs to Tellina' according to Conrad 1843
- 'Tellina lenis is recombined as Macoma lenis'
- 'Tellina longicallus belongs to Tellina' according to Scacchi 1836
- 'Tellina producta belongs to Tellina' according to Conrad 1840
- 'Tellina producta is recombined as Tellina (Angulus) producta'
- 'Tellinacea belongs to Teleodesmacea'
- 'Tellinidae belongs to Tellinacea'
- 'Thecodonta belongs to Leptonidae'
- 'Thecodonta (Dicranodesma) calvertensis belongs to Thecodonta (Dicranodesma)'
- 'Thovana was reranked as Pholas (Thovana) and belongs to Pholas'
- 'Thracia belongs to Thraciidae'
- 'Thracia declivis belongs to Thracia' according to Couthouy 1839
- 'Thracia declivis belongs to Thracia'
- 'Thraciidae belongs to Anatinacea'
- 'Veneracea belongs to Teleodesmacea'
- 'Venericardia belongs to Carditidae'
- 'Venericardia castrana belongs to Venericardia'
- 'Venericardia granulata belongs to Venericardia'
- 'Veneridae belongs to Veneracea'
- 'Venerinae belongs to Veneridae'
- 'Venus belongs to Venerinae'
- 'Venus alveata belongs to Venus' according to Conrad 1831
- 'Venus alveata is recombined as Chione alevata'
- 'Venus campechiensis belongs to Venus'
- 'Venus ducatelli belongs to Venus' according to Conrad 1838
- 'Venus ducatelli belongs to Venus'
- 'Venus inoceriformis belongs to Venus' according to Wagner 1839
- 'Venus inoceriformis is recombined as Clementia inoceriformis'
- 'Venus latilirata belongs to Venus' according to Conrad 1841
- 'Venus latilirata is recombined as Chione latilirata'
- 'Venus mercenaria belongs to Venus'
- 'Venus rileyi belongs to Venus'
- 'Yoldia belongs to Ledidae'