Opinions from L. R. Cox et al. 1969
- 'Acreuciroa was reranked as Euciroa (Acreuciroa) and belongs to Euciroa'
- 'Acyrena belongs to Corbiculidae'
- 'Aegilops belongs to Cyrtodontida'
- 'Aeora belongs to Meretricinae'
- 'Aeretica was reranked as Strigilla (Aeretica) and belongs to Strigilla'
- 'Agnomyax belongs to Tellininae'
- 'Allopagus belongs to Kelliellidae'
- 'Ambocardia belongs to Dicerocardiidae'
- 'Amerycina belongs to Erycinidae'
- 'Amotapus belongs to Raetomyidae'
- 'Amphichaena belongs to Psammobiinae'
- 'Amphipsammus was reranked as Gari (Amphipsammus) and belongs to Gari'
- 'Ampliata is replaced by Perampliata'
- 'Ancliffia was reranked as Goodallia (Ancliffia) and belongs to Goodallia'
- 'Angusticardo belongs to Sportellidae'
- 'Anodontopleura belongs to Hippuritacea'
- 'Anomalokellia belongs to Leptonidae'
- 'Antiguamya was reranked as Tugonia (Antiguamya) and belongs to Tugonia'
- 'Aralocardia was reranked as Glossus (Aralocardia) and belongs to Glossus'
- 'Arcopagiopsis belongs to Tellininae'
- 'Ardeamya was reranked as Psammotreta (Ardeamya) and belongs to Psammotreta'
- 'Asaphinella belongs to Psammobiinae'
- 'Asaphinoides was reranked as Asaphis (Asaphinoides) and belongs to Asaphis'
- 'Ascitellina belongs to Psammobiinae'
- 'Astarte tremula belongs to Astarte' according to de Ryckholt 1855
- 'Astarte tremula is recombined as Cypricardella tremula' according to Haffer 1959
- 'Astarte tremula is recombined as Eodon tremulus'
- 'Astartopis belongs to Astartinae'
- 'Austromacoma was reranked as Macoma (Austromacoma) and belongs to Macoma'
- 'Austroscintilla was reranked as Scacchia (Austroscintilla) and belongs to Scacchia'
- 'Aviculomya belongs to Bivalvia'
- 'Barbierella belongs to Lucinidae'
- 'Barcoona belongs to Bivalvia'
- 'Bathycorbis belongs to Mactromyidae'
- 'Bendemacoma was reranked as Macoma (Bendemacoma) and belongs to Macoma'
- 'Blagraveia belongs to Glossidae'
- 'Blairella belongs to Carditacea'
- 'Bleta belongs to Bivalvia'
- 'Boeuvia belongs to Divaricellinae'
- 'Bourdotia is a subjective synonym of Boeuvia'
- 'Bruniastarte was reranked as Amphiaraus (Bruniastarte) and belongs to Amphiaraus'
- 'Bryopa was reranked as Clavagella (Bryopa) and belongs to Clavagella'
- 'Byssomera is a subjective synonym of Carditamera'
- 'Bythiamena was reranked as Astarte (Bythiamena) and belongs to Astarte'
- 'Cabralista belongs to Euloxidae'
- 'Callucina (Callucina) belongs to Callucina'
- 'Callucinella was reranked as Parvilucina (Callucinella) and belongs to Parvilucina'
- 'Callucinopsis was reranked as Callucina (Callucinopsis) and belongs to Callucina'
- 'Capsella was reranked as Donax (Capsella) and belongs to Donax'
- 'Capsella is a subjective synonym of Gari'
- 'Cardilona belongs to Cardiliidae'
- 'Carditamera belongs to Carditamerinae'
- 'Carditamerinae belongs to Carditidae'
- 'Carditellopsis was reranked as Choniocardia (Carditellopsis) and belongs to Choniocardia'
- 'Carditomantea belongs to Palaeocarditinae'
- 'Carditopsis belongs to Condylocardiinae'
- 'Cardium porulosum is recombined as Vepricardium (Orthocardium) porulosum'
- 'Carinastarte was reranked as Astarte (Carinastarte) and belongs to Astarte'
- 'Carnidia belongs to Bivalvia'
- 'Cavilinga was reranked as Parvilucina (Cavilinga) and belongs to Parvilucina'
- 'Cavilucina belongs to Lucinidae'
- 'Ceroniola belongs to Mesodesmatinae'
- 'Cerullia belongs to Sportellidae'
- 'Chattonia was reranked as Crassatina (Chattonia) and belongs to Crassatina'
- 'Chavanella was reranked as Miodomeris (Chavanella) and belongs to Miodomeris'
- 'Chion was reranked as Donax (Chion) and belongs to Donax'
- 'Cicatellia belongs to Kelliidae'
- 'Cicatrea is a subjective synonym of Veniella'
- 'Clavagella belongs to Clavagellidae'
- 'Clavagella (Clavagella) belongs to Clavagella' according to Blainville 1817
- 'Clavagella (Clavagella) belongs to Clavagella'
- 'Clavagella (Dacosta) belongs to Clavagella'
- 'Clisocolus belongs to Mactromyidae'
- 'Clotho is a nomen dubium'
- 'Codakia belongs to Lucininae'
- 'Codakia (Codakia) belongs to Codakia'
- 'Collignonicardia was reranked as Anisocardia (Collignonicardia) and belongs to Anisocardia'
- 'Comus was reranked as Tivela (Comus) and belongs to Tivela'
- 'Cooperellopsis was reranked as Cooperella (Cooperellopsis) and belongs to Cooperella'
- 'Coquandia belongs to Corbulidae'
- 'Corbiculella was reranked as Corbicula (Corbiculella) and belongs to Corbicula'
- 'Corbiculopsis belongs to Trapeziidae'
- 'Corburella was reranked as Tancredia (Corburella) and belongs to Tancredia'
- 'Cordiula belongs to Mactromyidae'
- 'Coripia was reranked as Pteromeris (Coripia) and belongs to Pteromeris'
- 'Cossmannella belongs to Carditamerinae'
- 'Cretocardia belongs to Carditamerinae'
- 'Cruciella belongs to Bivalvia'
- 'Cryptaulia belongs to Hippuritacea'
- 'Cryptocoelopis was reranked as Coelopis (Cryptocoelopis) and belongs to Coelopis'
- 'Ctena belongs to Lucininae'
- 'Ctena (Ctena) belongs to Ctena'
- 'Ctena (Talocodakia) belongs to Ctena'
- 'Cumularia belongs to Megalodontidae'
- 'Cuneus was reranked as Donax (Cuneus) and belongs to Donax'
- 'Cyanocyclas was reranked as Corbicula (Cyanocyclas) and belongs to Corbicula'
- 'Cyclocardia belongs to Carditamerinae'
- 'Cyclomactra was reranked as Mactra (Cyclomactra) and belongs to Mactra'
- 'Cyclopellatia belongs to Fimbriidae'
- 'Cyclosunetta was reranked as Sunetta (Cyclosunetta) and belongs to Sunetta'
- 'Cyrenobatissa was reranked as Batissa (Cyrenobatissa) and belongs to Batissa'
- 'Cyrenopsis belongs to Neomiodontidae'
- 'Cytherocardia was reranked as Glossus (Cytherocardia) and belongs to Glossus'
- 'Daharina belongs to Myoconchinae'
- 'Davidia belongs to Grammysiidae'
- 'Dechaseauxia belongs to Sauvagesiinae'
- 'Decipula belongs to Montacutidae'
- 'Degrangia was reranked as Panopea (Degrangia) and belongs to Panopea'
- 'Delia belongs to Bivalvia'
- 'Devonia belongs to Montacutidae'
- 'Dietrichia belongs to Arcticidae'
- 'Discomiltha belongs to Myrteinae'
- 'Disparilia belongs to Eriphylinae'
- 'Ditypodon belongs to Corbiculidae'
- 'Divalinga belongs to Divaricellinae'
- 'Divalinga (Divalinga) belongs to Divalinga'
- 'Divalinga (Stchepinskya) belongs to Divalinga'
- 'Divalucina belongs to Divaricellinae'
- 'Divaricella belongs to Divaricellinae'
- 'Divaricella (Divaricella) belongs to Divaricella'
- 'Divaricella (Egracina) belongs to Divaricella'
- 'Divaricella angulifera belongs to Divaricella' according to von Martens 1880
- 'Divaricella angulifera is recombined as Divaricella (Divaricella) angulifera'
- 'Divaricella perparvula is recombined as Divalinga (Viaderella) perparvula'
- 'Divaricella perparvula is recombined as Divalinga (Viaderella) perparvula' according to Chavan 1951
- 'Divaricella perparvula belongs to Divaricella' according to Dall 1901
- 'Divaricellinae belongs to Lucinidae'
- 'Divarikellia was reranked as Lepton (Divarikellia) and belongs to Lepton'
- 'Dolabra belongs to Myophoriidae'
- 'Donacopsis was reranked as Corbicula (Donacopsis) and belongs to Corbicula'
- 'Donax (Tentidonax) belongs to Donax'
- 'Dosiniopsella was reranked as Resatrix (Dosiniopsella) and belongs to Resatrix'
- 'Dosinorbis was reranked as Dosinia (Dosinorbis) and belongs to Dosinia'
- 'Dozyia was reranked as Eriphyla (Dozyia) and belongs to Eriphyla'
- 'Eamesiella belongs to Milthinae'
- 'Egerella belongs to Donacidae'
- 'Elasmatium belongs to Bivalvia'
- 'Elliptoidea belongs to Bivalvia'
- 'Ensia belongs to Bivalvia'
- 'Ensio was reranked as Gonilia (Ensio) and belongs to Gonilia'
- 'Eocrassina belongs to Kelliellidae'
- 'Eodiceras belongs to Plesiodiceratinae'
- 'Eodonax belongs to Tancrediidae'
- 'Eomegalodus belongs to Megalodontidae'
- 'Eomeretrix belongs to Meretricinae'
- 'Eoprosodacna belongs to Lymnocardiinae'
- 'Epicodakia belongs to Lucininae'
- 'Epilucina was reranked as Lucina (Epilucina) and belongs to Lucina'
- 'Eriphylopsis belongs to Eriphylinae'
- 'Erodona belongs to Erodonidae'
- 'Erycinopsis was reranked as Semierycina (Erycinopsis) and belongs to Semierycina'
- 'Eucallista was reranked as Amiantis (Eucallista) and belongs to Amiantis'
- 'Euciroa belongs to Verticordiidae'
- 'Euciroa (Euciroa) belongs to Euciroa' according to Dall 1881
- 'Euciroa (Euciroa) belongs to Euciroa'
- 'Eufistulana belongs to Gastrochaenidae'
- 'Fabulina was reranked as Tellina (Fabulina) and belongs to Tellina'
- 'Fimbria belongs to Fimbriidae'
- 'Fimbriella is an objective synonym of Thetis'
- 'Finlayella was reranked as Tellina (Finlayella) and belongs to Tellina'
- 'Foegia was reranked as Penicillus (Foegia) and belongs to Penicillus'
- 'Fogiella is a subjective synonym of Pleuromya'
- 'Fogiella deningeri is recombined as Pleuromya deningeri'
- 'Formosulus belongs to Martesiinae'
- 'Fulcrella belongs to Sportellidae'
- 'Gastrochaenopsis belongs to Gastrochaenidae'
- 'Gibboconcha belongs to Bivalvia'
- 'Gilbertharrisella belongs to Pitarinae'
- 'Glibertia belongs to Condylocardiinae'
- 'Glycydonta was reranked as Timoclea (Glycydonta) and belongs to Timoclea'
- 'Gomphinella was reranked as Gomphina (Gomphinella) and belongs to Gomphina'
- 'Gomphomarcia was reranked as Marcia (Gomphomarcia) and belongs to Marcia'
- 'Gonilia belongs to Astartinae'
- 'Goodalliopsis belongs to Erycinidae'
- 'Goossensia belongs to Carditamerinae'
- 'Gradilucina is a subjective synonym of Volupia'
- 'Grammatodonax was reranked as Donax (Grammatodonax) and belongs to Donax'
- 'Grotriania was reranked as Astarte (Grotriania) and belongs to Astarte'
- 'Grundensia belongs to Sportellidae'
- 'Guebhardia belongs to Bivalvia'
- 'Haastina belongs to Fimbriidae'
- 'Halicardia belongs to Verticordiidae'
- 'Halicardissa belongs to Verticordiidae'
- 'Haliris belongs to Verticordiidae'
- 'Haliris (Haliris) belongs to Haliris'
- 'Haliris (Setaliris) belongs to Haliris'
- 'Haliris (Vertisphaera) is reassigned into Verticordia'
- 'Hardaghia belongs to Sauvagesiinae'
- 'Hatasia was reranked as Pholadidea (Hatasia) and belongs to Pholadidea'
- 'Hemicorbicula was reranked as Eocallista (Hemicorbicula) and belongs to Eocallista'
- 'Hemicyclonosta belongs to Cardiliidae'
- 'Hercodon belongs to Tellininae'
- 'Here (Here) belongs to Here'
- 'Herella was reranked as Here (Herella) and belongs to Here'
- 'Herouvalia was reranked as Amphichaena (Herouvalia) and belongs to Amphichaena'
- 'Heteropholas belongs to Martesiinae'
- 'Heteropis belongs to Opinae'
- 'Hiatula is an objective synonym of Mya'
- 'Hinemoana belongs to Chioninae'
- 'Humphreyia belongs to Clavagellidae'
- 'Hypanis belongs to Adacninae'
- 'Iacra was reranked as Abra (Iacra) and belongs to Abra'
- 'Illesca was reranked as Linga (Illesca) and belongs to Linga'
- 'Illionia belongs to Milthinae'
- 'Illionia canadensis belongs to Illionia'
- 'Illionia canadensis belongs to Illionia' according to Whiteaves 1884
- 'Iphigenia belongs to Donacidae'
- 'Isocrassina was reranked as Astarte (Isocrassina) and belongs to Astarte'
- 'Isodonta is a subjective synonym of Sowerbya'
- 'Isotancredia was reranked as Tancredia (Isotancredia) and belongs to Tancredia'
- 'Janschinella was reranked as Lentidium (Janschinella) and belongs to Lentidium'
- 'Joannisiella is a subjective synonym of Cycladicama'
- 'Kermadysmea was reranked as Gari (Kermadysmea) and belongs to Gari'
- 'Kipia belongs to Caprinidae'
- 'Kurinuia belongs to Verticordiidae'
- 'Laevicirce was reranked as Circe (Laevicirce) and belongs to Circe'
- 'Laevicordia belongs to Verticordiidae'
- 'Lahilleona belongs to Lahilliidae'
- 'Lasaeokellya belongs to Kelliidae'
- 'Lasaeoneaera belongs to Montacutidae'
- 'Laubeia belongs to Bivalvia'
- 'Laubriereia belongs to Montacutidae'
- 'Lazariella was reranked as Carditamera (Lazariella) and belongs to Carditamera'
- 'Leckhamptonia was reranked as Astarte (Leckhamptonia) and belongs to Astarte'
- 'Lepidocardia belongs to Pitarinae'
- 'Leporimetis belongs to Macominae'
- 'Leptesthes was reranked as Corbicula (Leptesthes) and belongs to Corbicula'
- 'Libyaconchus belongs to Bivalvia'
- 'Linetia belongs to Mactromyidae'
- 'Linga belongs to Lucininae'
- 'Linga (Bellucina) belongs to Linga'
- 'Linga (Linga) belongs to Linga'
- 'Linga (Pleurolucina) belongs to Linga'
- 'Liodonax belongs to Psammobiinae'
- 'Litigiella belongs to Erycinidae'
- 'Loparia belongs to Arcticidae'
- 'Loripes belongs to Lucininae'
- 'Lucina belongs to Lucinidae'
- 'Lucina (Cyclas) cumingi belongs to Lucina (Cyclas)' according to Adams and Angas 1863
- 'Lucina (Cyclas) cumingi is recombined as Divalucina cumingi'
- 'Lucina (Cyclas) cumingi is recombined as Divalucina cumingi' according to Iredale 1936
- 'Lucina (Here) was reranked as Here and belongs to Lucininae'
- 'Lucina (Lucina) belongs to Lucina'
- 'Lucina barbieri is recombined as Barbierella barbieri'
- 'Lucina barbieri belongs to Lucina' according to Deshayes 1858
- 'Lucina bourdoti is recombined as Bourdotia bourdoti' according to Dall 1901
- 'Bourdotia bourdoti is a subjective synonym of Boeuvia pulchella'
- 'Lucina commutata belongs to Lucina' according to Philippi 1836
- 'Lucina commutata is a subjective synonym of Lucinella divaricata'
- 'Lucina dolabra belongs to Lucina' according to Conrad 1833
- 'Lucina dolabra is recombined as Recurvella dolabra'
- 'Lucina gigantea is recombined as Pseudomiltha (Pseudomiltha) gigantea'
- 'Lucina pisum belongs to Lucina' according to Philippi 1857
- 'Lucina pisum is a subjective synonym of Divalinga (Viaderella) perparvula'
- 'Lucina plebeia is recombined as Mesolinga plebeia'
- 'Lucina plebeia belongs to Lucina' according to Contejean 1859
- 'Lucina pulchella belongs to Lucina' according to Agassiz 1845
- 'Lucina pulchella is recombined as Boeuvia pulchella' according to Chavan 1948
- 'Lucina pulchella is recombined as Boeuvia pulchella'
- 'Lucina pulchra belongs to Lucina' according to Zittel and Goubert 1861
- 'Lucina pulchra is recombined as Mesomiltha pulchra'
- 'Lucina radians is recombined as Callucina (Callucina) radians'
- 'Lucina rigaultiana is recombined as Divalinga (Stchepinskya) rigaultiana'
- 'Lucina rigaultiana belongs to Lucina' according to Deshayes 1858
- 'Lucina rigaultiana is recombined as Divalinga (Stchepinskya) rigaultiana' according to Chavan 1951
- 'Lucina rostrata belongs to Lucina' according to Pecchioli 1864
- 'Lucina rostrata is recombined as Megaxinus (Megaxinus) rostrata'
- 'Lucina sulcata is recombined as Cavilucina sulcata'
- 'Lucina tabulata belongs to Lucina' according to Deshayes 1858
- 'Lucina tabulata is recombined as Volupia tabulata'
- 'Lucina undulata belongs to Lucina' according to Lamarck 1806
- 'Lucina undulata is recombined as Paralucinella undulata' according to Chavan 1951
- 'Lucina undulata is recombined as Paralucinella undulata'
- 'Lucinaxinus belongs to Erycinidae'
- 'Lucinella belongs to Divaricellinae'
- 'Lucininae belongs to Lucinidae'
- 'Luciniola belongs to Lucininae'
- 'Lucinisca was reranked as Lucina (Lucinisca) and belongs to Lucina'
- 'Lucinopsis is an objective synonym of Mysia'
- 'Lunulicardia was reranked as Fragum (Lunulicardia) and belongs to Fragum'
- 'Lyonsiella belongs to Verticordiidae'
- 'Lyonsiella (Lyonsiella) belongs to Lyonsiella' according to Sars 1872
- 'Lyonsiella (Lyonsiella) belongs to Lyonsiella'
- 'Lyonsiella (Proagorina) belongs to Lyonsiella' according to Iredale 1930
- 'Lyonsiella (Proagorina) belongs to Lyonsiella'
- 'Lyrodobankia was reranked as Bankia (Lyrodobankia) and belongs to Bankia'
- 'Machaerodonax was reranked as Donax (Machaerodonax) and belongs to Donax'
- 'Macoma (Panacoma) belongs to Macoma'
- 'Macridiscus was reranked as Gomphina (Macridiscus) and belongs to Gomphina'
- 'Macrodonax belongs to Donacidae'
- 'Macrosolen belongs to Psammobiinae'
- 'Mactomyella was reranked as Mactromyopsis (Mactromyella) and belongs to Mactromyopsis'
- 'Mactromya belongs to Mactromyidae'
- 'Mactromyopsis belongs to Mactromyidae'
- 'Mactrona was reranked as Mactra (Mactrona) and belongs to Mactra'
- 'Mancikellia belongs to Montacutidae'
- 'Megadiceras belongs to Epidiceratinae'
- 'Megagrypha belongs to Bivalvia'
- 'Megalocardia belongs to Dicerocardiidae'
- 'Megalodus is a nomen vanum'
- 'Megalomoidea belongs to Megalodontidae'
- 'Megalomus is a subjective synonym of Megalomoidea'
- 'Megaxinus belongs to Lucininae'
- 'Megaxinus (Megaxinus) belongs to Megaxinus'
- 'Megaxinus (Megaxinus) belongs to Megaxinus' according to Brugnone 1880
- 'Meisenia was reranked as Pitar (Meisenia) and belongs to Pitar'
- 'Meretrissa belongs to Meretricinae'
- 'Merignacia belongs to Montacutidae'
- 'Mesodiceras belongs to Heterodiceratinae'
- 'Mesolinga belongs to Lucininae'
- 'Mesomiltha belongs to Myrteinae'
- 'Microcirce was reranked as Circe (Microcirce) and belongs to Circe'
- 'Microcyprina belongs to Arcticidae'
- 'Microdon bellastriata is recombined as Eodon bellastriatus'
- 'Milthinae belongs to Lucinidae'
- 'Miocardiella was reranked as Glossus (Miocardiella) and belongs to Glossus'
- 'Miocardiopsis was reranked as Glossus (Miocardiopsis) and belongs to Glossus'
- 'Miorangia was reranked as Rangia (Miorangia) and belongs to Rangia'
- 'Modiola (Septiola) was reranked as Septiola and belongs to Mytilidae'
- 'Modiolina was reranked as Myoconcha (Modiolina) and belongs to Myoconcha'
- 'Mokattamia belongs to Arcticidae'
- 'Monnieria was reranked as Matheronia (Monnieria) and belongs to Matheronia'
- 'Montanaria belongs to Mactromyidae'
- 'Musculiopsis belongs to Neomiodontidae'
- 'Mutiella belongs to Fimbriidae'
- 'Myoconchinae belongs to Permophoridae'
- 'Myrsopsis was reranked as Tapes (Myrsopsis) and belongs to Tapes'
- 'Myrtea belongs to Myrteinae'
- 'Myrtaea is a misspelling of Myrtea'
- 'Myrtaea (Myrtaea) is a misspelling of Myrtea (Myrtea)'
- 'Myrtea (Myrtea) belongs to Myrtea'
- 'Myrteinae belongs to Lucinidae'
- 'Myrteopsis was reranked as Myrtea (Myrteopsis) and belongs to Myrtea'
- 'Naulia belongs to Pitarinae'
- 'Nemetia belongs to Corbiculidae'
- 'Neritra belongs to Pollicidae'
- 'Nesobornia belongs to Kelliidae'
- 'Nevenulora belongs to Lucininae'
- 'Nevenulora (Jagonoma) belongs to Nevenulora'
- 'Nevenulora (Nevenulora) belongs to Nevenulora' according to Iredale 1930
- 'Nevenulora (Nevenulora) belongs to Nevenulora'
- 'Nicania was reranked as Tridonta (Nicania) and belongs to Tridonta'
- 'Nicaniella belongs to Astartinae'
- 'Nidarica belongs to Cardiniidae'
- 'Nipponomarcia was reranked as Katelysia (Nipponomarcia) and belongs to Katelysia'
- 'Nitidotellina was reranked as Tellina (Nitidotellina) and belongs to Tellina'
- 'Notirus was reranked as Irus (Notirus) and belongs to Irus'
- 'Notomyrtea is a subjective synonym of Myrtea'
- 'Notopaphia was reranked as Irus (Notopaphia) and belongs to Irus'
- 'Novathaca was reranked as Protothaca (Novathaca) and belongs to Protothaca'
- 'Omnivenus was reranked as Pitar (Omnivenus) and belongs to Pitar'
- 'Onkogrypha belongs to Bivalvia'
- 'Opimarcia was reranked as Eumarcia (Opimaria) and belongs to Eumarcia'
- 'Orthocardium was reranked as Vepricardium (Orthocardium) and belongs to Vepricardium'
- 'Ospriasolen belongs to Cultellidae'
- 'Ostreavicula belongs to Bivalvia'
- 'Ovicardium was reranked as Acrosterigma (Ovicardium) and belongs to Acrosterigma'
- 'Pachyrismella was reranked as Pachyrisma (Pachyrismella) and belongs to Pachyrisma'
- 'Palaeolucina belongs to Mactromyidae'
- 'Palaeomya was reranked as Tancredia (Palaeomya) and belongs to Tancredia'
- 'Palaeomya is a subjective synonym of Protomya'
- 'Palaeopinna flabellum belongs to Palaeopinna'
- 'Palus belongs to Hippuritacea'
- 'Panomya belongs to Hiatellidae'
- 'Paracorbicula was reranked as Corbicula (Paracorbicula) and belongs to Corbicula'
- 'Paracyclas belongs to Mactromyidae'
- 'Paradiceras belongs to Heterodiceratinae'
- 'Paradoxia belongs to Bivalvia'
- 'Paralucinella belongs to Divaricellinae'
- 'Paramonopleura belongs to Monopleuridae'
- 'Parasauvagesia belongs to Radiolitinae'
- 'Paratancredia was reranked as Tancredia (Paratancredia) and belongs to Tancredia'
- 'Parisiella belongs to Astartinae'
- 'Particoma was reranked as Martesia (Particoma) and belongs to Martesia'
- 'Parvicorbus is corrected as Parvicorbis and belongs to Fimbriidae'
- 'Parvilucina (Microloripes) belongs to Parvilucina'
- 'Parvilucina (Parvilucina) belongs to Parvilucina' according to Dall 1901
- 'Parvivenus is a subjective synonym of Timoclea'
- 'Passya belongs to Galeommatidae'
- 'Pecchiolia belongs to Verticordiidae'
- 'Penicillus belongs to Clavagellidae'
- 'Penicillus (Penicillus) belongs to Penicillus' according to Bruguière 1789
- 'Penicillus (Penicillus) belongs to Penicillus'
- 'Perampliata belongs to Myrteinae'
- 'Permophoridae belongs to Carditacea'
- 'Permophorinae belongs to Permophoridae'
- 'Perna arbolensis is recombined as Amotapus arbolensis'
- 'Persikima was reranked as Tridacna (Persikima) and belongs to Tridacna'
- 'Phacoides (Callucina) was reranked as Callucina and belongs to Lucininae'
- 'Phacoides (Here) andersoni belongs to Phacoides (Here)' according to Olsson 1930
- 'Phacoides (Here) andersoni is recombined as Linga (Illesca) andersoni'
- 'Phacoides (Parvilucina) was reranked as Parvilucina and belongs to Lucininae'
- 'Phaenomya is an objective synonym of Erodona'
- 'Phaenomya vaderensis is recombined as Erodona vaderensis'
- 'Phaxas belongs to Cultellidae'
- 'Phenacocyclas belongs to Lucinidae'
- 'Phenacocyclas pohli belongs to Phenacocyclas'
- 'Pholadopsis was reranked as Jouannetia (Pholadopsis) and belongs to Jouannetia'
- 'Physoida belongs to Corbulinae'
- 'Pileochama belongs to Hippuritacea'
- 'Pillucina belongs to Lucininae'
- 'Pillucina (Pillucina) belongs to Pillucina' according to Pilsbry 1921
- 'Pillucina (Pillucina) belongs to Pillucina'
- 'Planikellia was reranked as Lepton (Planikellia) and belongs to Lepton'
- 'Planitivela was reranked as Tivela (Planitivela) and belongs to Tivela'
- 'Platymya is replaced by Platymyoidea'
- 'Platymya dilatata is recombined as Platymyoidea dilatata'
- 'Plesiocyprinella belongs to Mactromyidae'
- 'Pleuroconcha was reranked as Ptychomya (Pleuroconcha) and belongs to Ptychomya'
- 'Plionema was reranked as Cyclocardia (Plionema) and belongs to Cyclocardia'
- 'Plurigens was reranked as Dosina (Plurigens) and belongs to Dosina'
- 'Pompholigina belongs to Divaricellinae'
- 'Potamomya is a subjective synonym of Erodona'
- 'Potidoma was reranked as Properycina (Potidoma) and belongs to Properycina'
- 'Praecaprina belongs to Caprinidae'
- 'Praecardiomya belongs to Bivalvia'
- 'Praerangia was reranked as Rangia (Praerangia) and belongs to Rangia'
- 'Prodreissensia was reranked as Dreissena (Prodreissensia) and belongs to Dreissena'
- 'Productae is corrected as Productea and belongs to Bivalvia'
- 'Prolucina is a subjective synonym of Illionia'
- 'Prosocoelogeton was reranked as Prosocoelus (Prosocoelogeton) and belongs to Prosocoelus'
- 'Prosocoelus belongs to Opinae'
- 'Prosodacna belongs to Lymnocardiinae'
- 'Protodiceras belongs to Megalodontidae'
- 'Psammobella was reranked as Gari (Psammobella) and belongs to Gari'
- 'Psammoconcha belongs to Bivalvia'
- 'Psammodonax was reranked as Gari (Psammodonax) and belongs to Gari'
- 'Psammoica was reranked as Gari (Psammoica) and belongs to Gari'
- 'Psammotaena was reranked as Gari (Psammotaena) and belongs to Gari'
- 'Pseudobrechites was reranked as Penicillus (Pseudobrechites) and belongs to Penicillus'
- 'Pseudocyrena was reranked as Polymesoda (Pseudocyrena) and belongs to Polymesoda'
- 'Pseudoirus was reranked as Petricola (Pseudoirus) and belongs to Petricola'
- 'Pseudolepton belongs to Kelliidae'
- 'Pseudolucinisca was reranked as Callucina (Pseudolucinisca) and belongs to Callucina'
- 'Pseudomiltha belongs to Milthinae'
- 'Pseudomiltha (Pseudomiltha) belongs to Pseudomiltha' according to P. Fischer 1887
- 'Pseudomiltha (Pseudomiltha) belongs to Pseudomiltha'
- 'Pseudopermophorus belongs to Permophorinae'
- 'Pseudopis belongs to Palaeocarditinae'
- 'Pseudopleurophorus belongs to Trapeziidae'
- 'Pseudosanguinolites belongs to Myoconchinae'
- 'Pterolucina belongs to Milthinae'
- 'Pteromyrtea was reranked as Megaxinus (Pteromyrtea) and belongs to Megaxinus'
- 'Pythina belongs to Erycinidae'
- 'Raetomya belongs to Raetomyidae'
- 'Rakhia belongs to Glossidae'
- 'Rebusum belongs to Bivalvia'
- 'Recticardo was reranked as Miltha (Recticardo) and belongs to Miltha'
- 'Recurvella belongs to Lucininae'
- 'Redicirce was reranked as Circe (Redicirce) and belongs to Circe'
- 'Resania belongs to Zenatiinae'
- 'Rhectomyax belongs to Psammobiinae'
- 'Rhedensia belongs to Hippuritidae'
- 'Rhenanomya belongs to Bivalvia'
- 'Rictocyma was reranked as Tridonta (Rictocyma) and belongs to Tridonta'
- 'Rochefortula belongs to Montacutidae'
- 'Rohea belongs to Pitarinae'
- 'Rohini belongs to Gemminae'
- 'Rostrotortus belongs to Estheriininae'
- 'Roxoa belongs to Hiatellidae'
- 'Sarmatimactra was reranked as Mactra (Sarmatimactra) and belongs to Mactra'
- 'Scalaricardita was reranked as Cyclocardia (Scalaricardita) and belongs to Cyclocardia'
- 'Scaldia belongs to Fimbriidae'
- 'Schafhaeutlia belongs to Fimbriidae'
- 'Scissulina was reranked as Macoma (Scissulina) and belongs to Macoma'
- 'Scrobiculabra belongs to Scrobiculariidae'
- 'Sechurina was reranked as Aphrodina (Sechurina) and belongs to Aphrodina'
- 'Seendia belongs to Astartinae'
- 'Semelina belongs to Semelidae'
- 'Semicorbula belongs to Corbulidae'
- 'Semierycina belongs to Erycinidae'
- 'Septeuilia belongs to Semelidae'
- 'Serrula was reranked as Donax (Serrula) and belongs to Donax'
- 'Sexta belongs to Mactromyidae'
- 'Similivenus was reranked as Marcia (Similivenus) and belongs to Marcia'
- 'Sinodiopsis was reranked as Pelecyora (Sinodiopsis) and belongs to Pelecyora'
- 'Sinonovacula belongs to Novaculininae'
- 'Sinucongeria was reranked as Dreissena (Sinucongeria) and belongs to Dreissena'
- 'Siratoria was reranked as Tapes (Siratoria) and belongs to Tapes'
- 'Sita belongs to Astartinae'
- 'Sogamosa belongs to Corbiculidae'
- 'Solidicorbula was reranked as Corbula (Solidicorbula) and belongs to Corbula'
- 'Sphaera belongs to Fimbriidae'
- 'Sphaeriola belongs to Fimbriidae'
- 'Spinosipella was reranked as Verticordia (Spinosipella) and belongs to Verticordia'
- 'Spisulona was reranked as Spisula (Spisulona) and belongs to Spisula'
- 'Stagnestesta belongs to Estheriininae'
- 'Stahlia belongs to Myoconchinae'
- 'Stearnsia belongs to Scambulinae'
- 'Stewartia is a subjective synonym of Megaxinus'
- 'Stiphromactra was reranked as Mactra (Stiphromactra) and belongs to Mactra'
- 'Stirpulina was reranked as Clavagella (Stirpulina) and belongs to Clavagella'
- 'Striacallista was reranked as Naulia (Striacallista) and belongs to Naulia'
- 'Striolucina was reranked as Callucina (Striolucina) and belongs to Callucina'
- 'Sulcocardia was reranked as Glossus (Sulcocardia) and belongs to Glossus'
- 'Sunettina was reranked as Sunetta (Sunettina) and belongs to Sunetta'
- 'Sydlorina was reranked as Pillucina (Sydlorina) and belongs to Pillucina'
- 'Synodontites belongs to Biradiolitinae'
- 'Taeniodon belongs to Bivalvia'
- 'Tatella belongs to Bivalvia'
- 'Taurotapes was reranked as Tapes (Taurotapes) and belongs to Tapes'
- 'Tealbya was reranked as Hartwellia (Tealbya) and belongs to Hartwellia'
- 'Tellina (Loxoglypta) is reassigned into Exotica'
- 'Tellina (Loxoglypta) belongs to Tellina' according to Dall et al. 1939
- 'Tellina ampliata belongs to Tellina' according to Philipps 1829
- 'Tellina ampliata is recombined as Ampliata amplicata' according to Arkell 1934
- 'Tellina ampliata is recombined as Perampliata amplicata'
- 'Tellina dentata is recombined as Divaricella (Egracina) dentata'
- 'Tellina dentata is recombined as Divaricella (Egracina) dentata' according to Chavan 1951
- 'Tellina divaricata is recombined as Lucinella divaricata'
- 'Tellina divaricata is recombined as Lucinella divaricata' according to di Monterosato 1883
- 'Tellinidella was reranked as Tellina (Tellinidella) and belongs to Tellina'
- 'Tellinocyclas was reranked as Corbicula (Tellinocyclas) and belongs to Corbicula'
- 'Tellinota is a subjective synonym of Tellinella'
- 'Tellipiura belongs to Tellininae'
- 'Teredinopsis belongs to Teredinidae'
- 'Thetiopsis belongs to Clementiinae'
- 'Thetironia is an objective synonym of Thetis'
- 'Thetis belongs to Mactromyidae'
- 'Tivelina belongs to Meretricinae'
- 'Tiza belongs to Pachydontinae'
- 'Tortucardia belongs to Trapeziidae'
- 'Trapezium (Schedotrapezium) was reranked as Schedotrapezium and belongs to Arcticidae'
- 'Trautscholdia was reranked as Nicaniella (Trautscholdia) and belongs to Nicaniella'
- 'Trigonella is an objective synonym of Mactra'
- 'Trigonella is replaced by Pachydesma' according to Conrad 1854
- 'Trigonella is replaced by Pachydesma'
- 'Tripleura was reranked as Prosocoelus (Tripleura) and belongs to Prosocoelus'
- 'Tugoniopsis was reranked as Tugonia (Tugoniopsis) and belongs to Tugonia'
- 'Turnus belongs to Teredinidae'
- 'Unicardiopsis belongs to Unicardiopsidae'
- 'Unicardium belongs to Mactromyidae'
- 'Vectorbis was reranked as Resatrix (Vectorbis) and belongs to Resatrix'
- 'Venericardia (Leuroactis) belongs to Venericardia'
- 'Venus orbicularis is recombined as Codakia (Codakia) orbicularis'
- 'Venus pumila belongs to Venus' according to Goldfuss 1840
- 'Venus pumila is recombined as Luciniola pumila'
- 'Vermitexta belongs to Leptonidae'
- 'Vertambitus was reranked as Verticordia (Vertambitus) and belongs to Verticordia'
- 'Verticordia belongs to Verticordiidae'
- 'Verticordia (Verticordia) belongs to Verticordia' according to Sowerby 1844
- 'Verticordia (Verticordia) belongs to Verticordia'
- 'Viaderella was reranked as Divalinga (Viaderella) and belongs to Divalinga'
- 'Villorita belongs to Corbiculidae'
- 'Vokesella belongs to Sportellidae'
- 'Volupia belongs to Lucininae'
- 'Waisiuconcha was reranked as Vesicomya (Waisiuconcha) and belongs to Vesicomya'
- 'Wallucina belongs to Lucininae'
- 'Warnea was reranked as Penicillus (Warnea) and belongs to Penicillus'
- 'Xylophomya belongs to Martesiinae'
- 'Yabea belongs to Astartinae'
- 'Zemyllita was reranked as Myllita (Zemyllita) and belongs to Myllita'
- 'Zenatiopsis was reranked as Zenatia (Zenatiopsis) and belongs to Zenatia'
- 'Zenatraria was reranked as Zenatia (Zenatraria) and belongs to Zenatia'
- 'Zirlona belongs to Pholadinae'
- 'Zorrita was reranked as Pseudomiltha (Zorrita) and belongs to Pseudomiltha'
- 'Zoziella was reranked as Azorinus (Zoziella) and belongs to Azorinus'