Opinions from L. R. Cox et al. 1969
- 'Actinodonta belongs to Cycloconchidae'
- 'Actinodonta cuneata belongs to Actinodonta'
- 'Actinotrigonia belongs to Trigoniidae'
- 'Alnifia belongs to Pterineidae'
- 'Anderkenia belongs to Pterineidae'
- 'Anopisthodon belongs to Trigoniacea'
- 'Anoptera is a subjective synonym of Cleionychia'
- 'Anthraconauta belongs to Myalinidae'
- 'Arcticeramus belongs to Inoceramidae'
- 'Arisaigia belongs to Malletiinae'
- 'Arisaigia postornata belongs to Arisaigia' according to McLearn 1918
- 'Arisaigia postornata belongs to Arisaigia'
- 'Aristerella belongs to Modiomorphidae'
- 'Aristerella nitidula belongs to Aristerella'
- 'Augea was reranked as Anthraconauta (Augea) and belongs to Anthraconauta'
- 'Aulacopleurum belongs to Trigoniacea'
- 'Austromytilus was reranked as Brachidontes (Austromytilus) and belongs to Brachidontes'
- 'Avicula capuliformis belongs to Avicula' according to Koch 1881
- 'Avicula capuliformis is recombined as Kochia capuliformis'
- 'Avicula dispar is recombined as Kochia dispar'
- 'Aviculoperna is a subjective synonym of Isognomon'
- 'Aviculovulsa belongs to Malleidae'
- 'Barbosaia belongs to Pterineidae'
- 'Bicrenula belongs to Malletiidae'
- 'Bittnerella is a subjective synonym of Hoferia'
- 'Boiomytilus belongs to Myalinidae'
- 'Boriesia belongs to Cuspidariidae'
- 'Borissia was reranked as Nuculana (Borissia) and belongs to Nuculana'
- 'Bouleigmus belongs to Malleidae'
- 'Brachyanodon was reranked as Anodonta (Brachyanodon) and belongs to Anodonta'
- 'Burckhardtia belongs to Cassianellidae'
- 'Byssodesma ulrikae belongs to Byssodesma' according to Isberg 1934
- 'Byssodesma ulrikae belongs to Byssodesma'
- 'Cadomia belongs to Malletiinae'
- 'Cadomia typa belongs to Cadomia' according to Tromelin 1877
- 'Cadomia typa belongs to Cadomia'
- 'Callitrigonia was reranked as Neotrigonia (Callitrigonia) and belongs to Neotrigonia'
- 'Callodonta monilifera belongs to Callodonta'
- 'Callodonta monilifera belongs to Callodonta' according to Isberg 1934
- 'Cardiolaria belongs to Praenuculidae'
- 'Cardiolaria barrandei belongs to Cardiolaria' according to Munier-Chalmas 1876
- 'Cardiolaria barrandei belongs to Cardiolaria'
- 'Cardiomorpha radiata is replaced by Cardiola lyoni'
- 'Cardiopsis is a subjective synonym of Cardiola'
- 'Caritodens is a subjective synonym of Pterinea'
- 'Casterella belongs to Megadesmidae'
- 'Ceromyella belongs to Ceratomyidae'
- 'Chaenodomus is a subjective synonym of Cymatonota'
- 'Chalmasia belongs to Malleidae'
- 'Cleidophorus is a subjective synonym of Nuculites'
- 'Climacotrigonia belongs to Trigoniidae'
- 'Cliopteria belongs to Pterineidae'
- 'Colpomya belongs to Modiomorphidae'
- 'Colpomya constricta belongs to Colpomya' according to Ulrich 1894
- 'Colpomya constricta belongs to Colpomya'
- 'Corallidomus is a subjective synonym of Modiolopsis'
- 'Corallidomus concentricus belongs to Corallidomus' according to Whitfield 1893
- 'Corallospondylus was reranked as Spondylus (Corallospondylus) and belongs to Spondylus'
- 'Cornellites is a subjective synonym of Ptychopteria'
- 'Costatoleda belongs to Nuculanidae'
- 'Crassiconcha belongs to Megadesmidae'
- 'Cteniopleurium was reranked as Entolium (Cteniopleurium) and belongs to Entolium'
- 'Ctenodonta belongs to Ctenodontidae'
- 'Ctenodonta (Tancrediopsis) was reranked as Tancrediopsis and belongs to Ctenodontidae'
- 'Ctenodonta contracta is recombined as Tancrediopsis contracta' according to Cossmann 1897
- 'Ctenodonta contracta is recombined as Tancrediopsis contracta'
- 'Ctenodontidae belongs to Ctenodontacea'
- 'Cucullaea antiqua belongs to Cucullaea' according to Sowerby 1839
- 'Cucullaea antiqua is recombined as Cucullella antiqua' according to Beushausen 1895
- 'Cucullaea opima belongs to Cucullaea' according to Hall 1843
- 'Cucullaea opima is recombined as Nuculoidea opima' according to Williams and Berger 1916
- 'Cucullaea opima is recombined as Nuculoidea opima'
- 'Cucullella is a subjective synonym of Nuculites'
- 'Curvirostrum belongs to Parallelodontinae'
- 'Cycloconcha belongs to Cycloconchidae'
- 'Cycloconcha mediocardinalis belongs to Cycloconcha' according to Miller 1874
- 'Cycloconcha mediocardinalis belongs to Cycloconcha'
- 'Cycloconchidae belongs to Cycloconchacea'
- 'Cymatonota belongs to Modiomorphidae'
- 'Cymatonota typicalis belongs to Cymatonota' according to Ulrich 1894
- 'Cymatonota typicalis belongs to Cymatonota'
- 'Cypricardia cymbaeformis belongs to Cypricardia' according to Sowerby 1839
- 'Cypricardia cymbaeformis is recombined as Goniophora cymbaeformis' according to Phillips 1848
- 'Cypricardia cymbaeformis is recombined as Goniophora (Goniophora) cymbaeformis'
- 'Darteplicatula was reranked as Plicatula (Darteplicatula) and belongs to Plicatula'
- 'Dceruska belongs to Modiomorphidae'
- 'Dceruska primula belongs to Dceruska' according to Barrande 1881
- 'Dceruska primula belongs to Dceruska'
- 'Deceptrix belongs to Praenuculidae'
- 'Deceptrix carinata belongs to Deceptrix' according to Fuchs 1919
- 'Deceptrix carinata belongs to Deceptrix'
- 'Dicerocardium eupalliatum is recombined as Paramegalodus eupalliatum'
- 'Digoniomya is a subjective synonym of Goniophorina'
- 'Digoniomya elegans belongs to Digoniomya' according to Whidborne 1897
- 'Dipleurodonta pulchella belongs to Dipleurodonta' according to Isberg 1934
- 'Dipleurodonta pulchella belongs to Dipleurodonta'
- 'Dolabra belongs to Myophoriidae'
- 'Dolichopteron belongs to Pterineidae'
- 'Durga was reranked as Pachyrisma (Durga) and belongs to Pachyrisma'
- 'Dysodonta belongs to Malletiidae'
- 'Dysodonta deprati belongs to Dysodonta' according to Mansuy 1913
- 'Dysodonta deprati belongs to Dysodonta'
- 'Ectenocardiomorpha elongata belongs to Ectenocardiomorpha' according to Isberg 1934
- 'Ectenocardiomorpha elongata belongs to Ectenocardiomorpha'
- 'Ekstadia belongs to Malletiinae'
- 'Ekstadia tricarinata belongs to Ekstadia' according to Soot-Ryen 1964
- 'Ekstadia tricarinata belongs to Ekstadia'
- 'Endodesma is a subjective synonym of Cymatonota'
- 'Endodesma cuneatum belongs to Endodesma' according to Ulrich 1894
- 'Endomargarus was reranked as Lyonsia (Endomargarus) and belongs to Lyonsia'
- 'Enkelbergia belongs to Ambonychiidae'
- 'Entoliopsis was reranked as Lentipecten (Entoliopsis) and belongs to Lentipecten'
- 'Eselaevitrigonia was reranked as Laevitrigonia (Eselaevitrigonia) and belongs to Laevitrigonia'
- 'Euptera belongs to Bakevelliidae'
- 'Eurymyella belongs to Modiomorphidae'
- 'Eurymyella shaleri belongs to Eurymyella'
- 'Eurymyella shaleri belongs to Eurymyella' according to Williams 1912
- 'Eusebia is a subjective synonym of Pseudocucullaea'
- 'Euthydesma belongs to Cardiolinae'
- 'Fabagella belongs to Cuspidariidae'
- 'Fasciculiconcha belongs to Aviculopectininae'
- 'Fascinewellipecten was reranked as Pterinopecten (Fascinewellipecten) and belongs to Pterinopecten'
- 'Ferganoconcha belongs to Ferganoconchidae'
- 'Follmannia was reranked as Nathorstella (Follmannia) and belongs to Nathorstella'
- 'Fractoceramus was reranked as Retroceramus (Fractoceramus) and belongs to Retroceramus'
- 'Gerlus belongs to Terquemiidae'
- 'Gervilleia ogilviae is recombined as Stefaninia ogilviae'
- 'Gervillia longispina is recombined as Monopteria longispina'
- 'Gibbomodiola was reranked as Modiolus (Gibbomodiola) and belongs to Modiolus'
- 'Girardotia belongs to Pholadomyidae'
- 'Goniophora belongs to Modiomorphidae'
- 'Goniophora (Cosmogoniophora) belongs to Goniophora'
- 'Goniophora (Goniophora) belongs to Goniophora' according to Phillips 1848
- 'Goniophora (Goniophora) belongs to Goniophora'
- 'Goniophora bellula belongs to Goniophora' according to Billings 1874
- 'Goniophora bellula is recombined as Goniophora (Cosmogoniophora) bellula' according to McLearn 1918
- 'Goniophora bellula is recombined as Goniophora (Cosmogoniophora) bellula'
- 'Goniophorina belongs to Modiomorphidae'
- 'Goniophorina (Cosmogoniophorina) belongs to Goniophorina'
- 'Goniophorina (Cosmogoniophorina) carinata belongs to Cosmogoniophorina' according to Isberg 1934
- 'Goniophorina (Cosmogoniophorina) carinata belongs to Cosmogoniophorina'
- 'Goniophorina (Goniophorina) belongs to Goniophorina' according to Isberg 1934
- 'Goniophorina (Goniophorina) belongs to Goniophorina'
- 'Goniophorina volvens is recombined as Goniophorina (Goniophorina) volvens'
- 'Gotodonta is a subjective synonym of Praectenodonta'
- 'Guerangeria belongs to Modiomorphidae'
- 'Guerangeria davousti belongs to Guerangeria' according to Oehlert 1880
- 'Guerangeria davousti belongs to Guerangeria'
- 'Haumea is a subjective synonym of Argopecten'
- 'Hefteria belongs to Myophoriidae'
- 'Heligmina belongs to Malleidae'
- 'Heligmopsis belongs to Malleidae'
- 'Hippagus is a subjective synonym of Crenella'
- 'Hippagus isocardioides is recombined as Crenella isocardioides'
- 'Hippomya belongs to Modiomorphidae'
- 'Hippomya ringens belongs to Hippomya' according to Salter 1864
- 'Hippomya ringens belongs to Hippomya'
- 'Honeymania is a subjective synonym of Cardiolaria'
- 'Honeymania planimarginata belongs to Honeymania' according to McLearn 1918
- 'Huxleyia belongs to Manzanellidae'
- 'Hypotrema belongs to Pulvinitidae'
- 'Hypoxytoma was reranked as Oxytoma (Hypoxytoma) and belongs to Oxytoma'
- 'Inoceramya belongs to Inoceramidae'
- 'Jacquesia is a subjective synonym of Terraia'
- 'Kaparachlamys was reranked as Chlamys (Kaparachlamys) and belongs to Chlamys'
- 'Kinerkaella was reranked as Anthraconauta (Kinerkaella) and belongs to Anthraconauta'
- 'Kobayashites belongs to Bakevelliidae'
- 'Korobkovitrigonia belongs to Trigoniidae'
- 'Lamellodonta belongs to Lamellodontidae'
- 'Lamellodonta simplex belongs to Lamellodonta' according to Vogel 1962
- 'Lamellodonta simplex belongs to Lamellodonta'
- 'Lamellodontidae belongs to Cycloconchacea'
- 'Leda bilunata belongs to Leda' according to Barrande 1881
- 'Leda bilunata is recombined as Myoplusia bilunata' according to Neumayr 1884
- 'Leda bilunata is recombined as Myoplusia bilunata'
- 'Leila belongs to Mutelidae'
- 'Leinzia belongs to Grammysiidae'
- 'Lenella belongs to Inoceramidae'
- 'Leptotrigonia was reranked as Yaadia (Leptotrigonia) and belongs to Yaadia'
- 'Limanomia belongs to Pterinopectinidae'
- 'Limatuella was reranked as Limaria (Limatuella) and belongs to Limaria'
- 'Linsdallia belongs to Isognomonidae'
- 'Liromytilus belongs to Modiomorphidae'
- 'Lissochlamis was reranked as Palliolum (Lissochlamis) and belongs to Palliolum'
- 'Lissopecten is a subjective synonym of Flexopecten'
- 'Lithobia is a subjective synonym of Modiolopsis'
- 'Lithobia atava belongs to Lithobia' according to Koken 1902
- 'Lithodomina belongs to Lithophaginae'
- 'Litschkovitrigonia was reranked as Steinmanella (Litschkovitrigonia) and belongs to Steinmanella'
- 'Machomya belongs to Pholadomyidae'
- 'Malagastrigonia was reranked as Laevitrigonia (Malagastrigonia) and belongs to Laevitrigonia'
- 'Malletiinae belongs to Nuculanacea'
- 'Manzanella belongs to Manzanellidae'
- 'Matheria belongs to Cyrtodontidae'
- 'Megambonia belongs to Modiomorphidae'
- 'Megambonia lyoni is recombined as Cardiola lyoni'
- 'Merismopteria belongs to Pterineidae'
- 'Mesotrigonia belongs to Trigoniidae'
- 'Mioporomya was reranked as Poromya (Mioporomya) and belongs to Poromya'
- 'Mixtipecten was reranked as Chlamys (Mixtipecten) and belongs to Chlamys'
- 'Modiodesma is an objective synonym of Modiolopsis'
- 'Modiolodon belongs to Modiomorphidae'
- 'Modiolopsis belongs to Modiomorphidae'
- 'Modiolopsis cincinnatiensis belongs to Modiolopsis' according to Hall and Whitfield 1875
- 'Modiolopsis cincinnatiensis is recombined as Whiteavesia cincinnatiensis' according to Ulrich 1893
- 'Modiolopsis oviformis belongs to Modiolopsis' according to Ulrich 1894
- 'Modiolopsis oviformis is recombined as Modiolodon oviformis' according to Ulrich 1894
- 'Modiolopsis oviformis is recombined as Modiolodon oviformis'
- 'Modiolopsis pholadiformis belongs to Modiolopsis' according to Hall 1851
- 'Modiolopsis pholadiformis is recombined as Pholadomorpha pholadiformis' according to Foerste 1914
- 'Modiolopsis pholadiformis is recombined as Whiteavesia pholadiformis' according to Ulrich 1893
- 'Modiomorpha belongs to Modiomorphidae'
- 'Modiomorpha attenuata belongs to Modiomorpha' according to Whiteaves 1894
- 'Modiomorpha attenuata is recombined as Liromytilus attenuata' according to LaRocque 1950
- 'Modiomorpha attenuata is recombined as Liromytilus attenuata'
- 'Modiomorphidae belongs to Modiomorphacea'
- 'Molukkana belongs to Pholadomyidae'
- 'Monopteria belongs to Monopteriidae'
- 'Mrassiella was reranked as Anthraconauta (Mrassiella) and belongs to Anthraconauta'
- 'Myadoropsis was reranked as Myadora (Myadoropsis) and belongs to Myadora'
- 'Myalinopterella belongs to Ambonychiidae'
- 'Myoplusia belongs to Malletiinae'
- 'Mytiloceramus was reranked as Inoceramus (Mytiloceramus) and belongs to Inoceramus'
- 'Mytilomorpha is a subjective synonym of Goniophora'
- 'Mytilops belongs to Modiolinae'
- 'Naiadopsis is a subjective synonym of Goniophora'
- 'Naiadopsis lamellosus belongs to Naiadopsis' according to Mendes 1952
- 'Nathorstella belongs to Ambonychiidae'
- 'Navicula is a subjective synonym of Arca'
- 'Neithella belongs to Pectinidae'
- 'Neitheops was reranked as Neithea (Neitheops) and belongs to Neithea'
- 'Nelltia belongs to Tellinidae'
- 'Neoactinodonta is a subjective synonym of Tanaodon'
- 'Neoactinodonta amygdalina is recombined as Tanaodon amygdalina'
- 'Newellipecten was reranked as Pterinopecten (Newellipecten) and belongs to Pterinopecten'
- 'Noetiella is a subjective synonym of Noetia'
- 'Notobotula belongs to Modiolinae'
- 'Notochlamys is a subjective synonym of Mesopeplum'
- 'Notovola is a subjective synonym of Pecten'
- 'Nucinella belongs to Manzanellidae'
- 'Nucula sulcata belongs to Nucula' according to Hisinger 1841
- 'Nucula sulcata is recombined as Gotodonta sulcata' according to Soot-Ryen 1964
- 'Nuculidae belongs to Nuculacea'
- 'Nuculites belongs to Malletiinae'
- 'Nuculites planulata belongs to Nuculites' according to Conrad 1841
- 'Nuculites planulata is recombined as Cleidophorus planulata' according to Hall 1847
- 'Nuculoidea belongs to Nuculidae'
- 'Offadesma was reranked as Periploma (Offadesma) and belongs to Periploma'
- 'Opisthocoelus belongs to Cardiolinae'
- 'Orthodesma is a subjective synonym of Modiolopsis'
- 'Orthodesma rectum belongs to Orthodesma' according to Whitfield 1875
- 'Orthonotella is a subjective synonym of Modiolopsis'
- 'Orthonotella faberi belongs to Orthonotella' according to Miller 1882
- 'Ostreinella belongs to Malleidae'
- 'Pachymegalodon was reranked as Pachyrisma (Pachymegalodon) and belongs to Pachyrisma'
- 'Pachymytilus (Pseudopachymytilus) was reranked as Pseudopachymytilus and belongs to Myalinidae'
- 'Pachyopis was reranked as Opis (Pachyopis) and belongs to Opis'
- 'Pachypteria is a subjective synonym of Pseudomonotis'
- 'Palaeanatina is a subjective synonym of Modiomorpha'
- 'Palaearca is a subjective synonym of Cyrtodonta'
- 'Palaeoconcha belongs to Praenuculidae'
- 'Palaeoconcha faberi belongs to Palaeoconcha'
- 'Palaeoconcha faberi belongs to Palaeoconcha' according to Miller 1889
- 'Palaeoneilo (Metapalaeoneilo) was reranked as Metapalaeoneilo and belongs to Malletiinae'
- 'Palaeoneilo (Metapalaeoneilo) baltica belongs to Palaeoneilo (Metapalaeoneilo)' according to Lamcke 1934
- 'Palaeoneilo (Metapalaeoneilo) baltica is recombined as Metapalaeoneilo baltica'
- 'Palaeoneilo raricostae belongs to Palaeoneilo' according to Chapman 1908
- 'Palaeoneilo raricostae is recombined as Praectenodonta raricostae' according to Philip 1962
- 'Palaeopharus (Minepharus) was reranked as Minepharus and belongs to Cardiniidae'
- 'Palaeopinna belongs to Pterineidae'
- 'Parallelodus belongs to Modiomorphidae'
- 'Parallelodus obliquus belongs to Parallelodus'
- 'Paramodiola glabra belongs to Paramodiola' according to Isberg 1934
- 'Parapecten is a subjective synonym of Weyla'
- 'Paraphtonia belongs to Modiomorphidae'
- 'Paraphtonia imitabilis belongs to Paraphtonia' according to Khalfin 1958
- 'Paraphtonia imitabilis belongs to Paraphtonia'
- 'Paraprothyris was reranked as Prothyris (Paraprothyris) and belongs to Prothyris'
- 'Paraucellina belongs to Buchiidae'
- 'Parvithracia belongs to Thraciidae'
- 'Parvochlamys was reranked as Palliolum (Parvochlamys) and belongs to Palliolum'
- 'Patrocardia is a subjective synonym of Spanila'
- 'Propeamussium (Propeamussium) is a nomen vanum'
- 'Pernomytilus was reranked as Mytilus (Pernomytilus) and belongs to Mytilus'
- 'Pethopecten was reranked as Chlamys (Pethopecten) and belongs to Chlamys'
- 'Phialopecten was reranked as Chlamys (Phialopecten) and belongs to Chlamys'
- 'Pholadomorpha belongs to Modiomorphidae'
- 'Pholadomya (Triplicosta) was reranked as Triplicosta and belongs to Pholadomyidae'
- 'Pholadomyocardia belongs to Ceratomyidae'
- 'Physetomya is a subjective synonym of Cymatonota'
- 'Physetomya acuminata belongs to Physetomya' according to Ulrich 1894
- 'Pleurodapis belongs to Permophorinae'
- 'Pleurophorina belongs to Myoconchinae'
- 'Pompeckjina belongs to Ambonychiidae'
- 'Praectenodonta belongs to Ctenodontidae'
- 'Praeleda is a subjective synonym of Deceptrix'
- 'Praemytilus belongs to Modiolinae'
- 'Praenucula belongs to Praenuculidae'
- 'Praenuculidae belongs to Nuculacea'
- 'Praeostrea is a subjective synonym of Vevoda'
- 'Prolobella belongs to Modiomorphidae'
- 'Prolobella striatula belongs to Prolobella' according to Ulrich 1894
- 'Prolobella striatula belongs to Prolobella'
- 'Promyophorella is a subjective synonym of Myophorella'
- 'Protopalliolum belongs to Pectinacea'
- 'Pseudanodonta belongs to Anodontinae'
- 'Pseudocyrtodonta is a subjective synonym of Myoplusia'
- 'Pseudodidymotis belongs to Posidoniidae'
- 'Pseudoheligmus belongs to Malleidae'
- 'Pseudopecten (Echinopecten) belongs to Pseudopecten'
- 'Pseudospatha belongs to Mutelidae'
- 'Psiloconcha is a subjective synonym of Cymatonota'
- 'Psiloconcha grandis belongs to Psiloconcha' according to Ulrich 1894
- 'Pterinea cardiiformis belongs to Pterinea' according to Hall 1843
- 'Pterinea cardiiformis is recombined as Megambonia cardiiformis' according to Hall 1859
- 'Pterinea cardiiformis is recombined as Megambonia cardiiformis'
- 'Pterinea concentrica belongs to Pterinea' according to Conrad 1838
- 'Pterinea concentrica is recombined as Modiomorpha concentrica' according to Hall 1885
- 'Pterinea concentrica is recombined as Modiomorpha concentrica'
- 'Pterinea modiolaris is recombined as Modiolopsis modiolaris' according to Hall 1847
- 'Pterinea modiolaris is recombined as Modiolopsis modiolaris'
- 'Pteronitina belongs to Pterineidae'
- 'Ptychostolis belongs to Nuculidae'
- 'Pyanomya belongs to Modiomorphidae'
- 'Pyanomya gibbosa belongs to Pyanomya' according to Miller 1881
- 'Pyanomya gibbosa belongs to Pyanomya'
- 'Pyrenomoeus is a subjective synonym of Nuculites'
- 'Pyrenomoeus cuneatus belongs to Pyrenomoeus' according to Hall 1852
- 'Quoiecchia belongs to Trigoniidae'
- 'Radiatodonta belongs to Modiomorphidae'
- 'Radiatodonta goslariensis belongs to Radiatodonta' according to Dahmer 1921
- 'Radiatodonta goslariensis belongs to Radiatodonta'
- 'Redonia belongs to Modiomorphidae'
- 'Redonia deshayesiana belongs to Redonia' according to Fischer 1886
- 'Redonia deshayesiana belongs to Redonia'
- 'Reniella is a subjective synonym of Vulsella'
- 'Rhombopteria (Newsomella) was reranked as Newsomella and belongs to Pterineidae'
- 'Rhynchomytilus belongs to Crenellinae'
- 'Rutotia is a subjective synonym of Streblopteria'
- 'Saffordia belongs to Modiomorphidae'
- 'Saffordia ventralis belongs to Saffordia' according to Ulrich 1894
- 'Saffordia ventralis belongs to Saffordia'
- 'Saintiopsis belongs to Plicatulidae'
- 'Semicorallidomus belongs to Modiomorphidae'
- 'Semicorallidomus whitfieldi belongs to Semicorallidomus'
- 'Semimodiola belongs to Mytilinae'
- 'Sergipia belongs to Inoceramidae'
- 'Setotrigonia was reranked as Steinmanella (Setotrigonia) and belongs to Steinmanella'
- 'Shanina belongs to Vlastinae'
- 'Similodonta belongs to Praenuculidae'
- 'Sinectenolium was reranked as Decatopecten (Sinectenolium) and belongs to Decatopecten'
- 'Spathella belongs to Modiomorphidae'
- 'Spathella typica belongs to Spathella' according to Hall 1885
- 'Spathella typica belongs to Spathella'
- 'Sphenolium is a subjective synonym of Modiolopsis'
- 'Sphenolium cuneiforme belongs to Sphenolium' according to Miller 1889
- 'Sphenotomorpha belongs to Modiomorphidae'
- 'Sphenotomorpha rigidula belongs to Sphenotomorpha' according to Williams and Berger 1916
- 'Sphenotomorpha rigidula belongs to Sphenotomorpha'
- 'Spinearca is a subjective synonym of Arcopsis'
- 'Stenzelia was reranked as Pachecoa (Stenzelia) and belongs to Pachecoa'
- 'Striatoceramus was reranked as Retroceramus (Striatoceramus) and belongs to Retroceramus'
- 'Synek is a subjective synonym of Palaeoneilo'
- 'Tanaodon belongs to Modiomorphidae'
- 'Tanaodon louderbacki belongs to Tanaodon'
- 'Tellinomorpha is a subjective synonym of Wilkingia'
- 'Tellinomya is a subjective synonym of Ctenodonta'
- 'Tellinomya nasuta is recombined as Ctenodonta nasuta'
- 'Tellinomya similis is recombined as Similodonta similis' according to Soot-Ryen 1964
- 'Tellinomya similis is recombined as Similodonta similis'
- 'Tergulina was reranked as Cuspidaria (Tergulina) and belongs to Cuspidaria'
- 'Toechomya belongs to Myophoriidae'
- 'Torinosulcatella was reranked as Catella (Torinosulcatella) and belongs to Catella'
- 'Trichomyella was reranked as Pachymya (Trichomyella) and belongs to Pachymya'
- 'Trigonellites is a subjective synonym of Myophoria'
- 'Trigonellites vulgaris belongs to Trigonellites' according to von Schlotheim 1820
- 'Trigonellites vulgaris is recombined as Myophoria vulgaris'
- 'Tropinuculites belongs to Malletiidae'
- 'Turkmenia belongs to Inoceramidae'
- 'Tylophora belongs to Modiomorphidae'
- 'Undatimusculus was reranked as Musculus (Undatimusculus) and belongs to Musculus'
- 'Ventalium belongs to Pectinidae'
- 'Verilarca is a subjective synonym of Arcopsis'
- 'Vertumnia was reranked as Pterinopecten (Vertumnia) and belongs to Pterinopecten'
- 'Vetoarca belongs to Striarcinae'
- 'Vevoda belongs to Vlastinae'
- 'Vigorniella belongs to Cyrtodontidae'
- 'Vulsellidae is a subjective synonym of Malleidae'
- 'Vulsellina belongs to Malleidae'
- 'Weyla (Pseudovola) belongs to Weyla'
- 'Whiteavesia belongs to Modiomorphidae'