Opinions from F. M. Anderson 1958
- 'Acanthoceras lecontei belongs to Acanthoceras'
- 'Acanthoceras meridionalis belongs to Acanthoceras' according to Stoliczka 1864
- 'Acanthoceras meridionalis is recombined as Cunningtoniceras meridionale'
- 'Acanthoceras newboldi is recombined as Calycoceras (Eucalycoceras) newboldi'
- 'Acanthoceras shastense belongs to Acanthoceras'
- 'Actaeon inornatus belongs to Actaeon' according to White 1889
- 'Acteonella frazierensis belongs to Acteonella'
- 'Acteonella packardi belongs to Acteonella'
- 'Acteonella rustica belongs to Acteonella'
- 'Acteonina bellavistana belongs to Acteonina'
- 'Acteonina berryessensis belongs to Acteonina'
- 'Acteonina colusaensis belongs to Acteonina'
- 'Acteonina roguensis belongs to Acteonina'
- 'Acteonina ursula belongs to Acteonina'
- 'Acteonina ursulagorda belongs to Acteonina'
- 'Acteonina yrekensis belongs to Acteonina'
- 'Alaria nodosa belongs to Alaria'
- 'Ammonites chicoensis is recombined as Mortoniceras (Submortoniceras) chicoense'
- 'Ammonites complexus suciaensis is recombined as Eupachydiscus suciensis'
- 'Ammonites cooperii is recombined as Emperoceras cooperii'
- 'Ammonites cunningtoni is recombined as Cunningtoniceras cunningtoni'
- 'Ammonites fraternus is recombined as Canadoceras fraternum'
- 'Ammonites ganesa is recombined as Parapachydiscus ganesa'
- 'Ammonites gardeni is recombined as Hauericeras gardeni'
- 'Ammonites haydenii is recombined as Beudanticeras haydenii'
- 'Ammonites hippocrepis is recombined as Scaphites hippocrepis'
- 'Ammonites inanis is recombined as Desmoceras (Latidorsella) inane'
- 'Ammonites jugalis is recombined as Desmoceras (Latidorsella) jugale'
- 'Ammonites kayei is recombined as Lytoceras (Gaudryceras) kayei'
- 'Ammonites newberryanus is recombined as Canadoceras newberryanum'
- 'Ammonites ootacodensis is recombined as Parapachydiscus ootacodensis'
- 'Ammonites planulatus is recombined as Puzosia (Parapuzosia) planulatus'
- 'Ammonites selwynianus is recombined as Desmophyllites selwynianus'
- 'Ammonites tehamaensis is recombined as Peroniceras tehamaense'
- 'Ammonites timotheanus is recombined as Lytoceras (Tetragonites) timotheanum'
- 'Ammonites turneri is recombined as Calycoceras (Eucalycoceras) turneri'
- 'Ammonites vancouverensis belongs to Ammonites' according to Meek 1861
- 'Ammonites vancouverensis is recombined as Placenticeras vancouverense' according to Meek 1876
- 'Ammonites vancouverensis is recombined as Hoplites vancouverensis' according to Whiteaves 1892
- 'Ammonites vancouverensis is recombined as Placenticeras vancouverense'
- 'Anchura condoniana is recombined as Drepanochilus condoniana'
- 'Ancyloceras lineatus is recombined as Oxybeloceras lineatum'
- 'Anisoceras charlottense belongs to Anisoceras'
- 'Anisoceras draconis belongs to Anisoceras'
- 'Aporrhais californica is recombined as Anchura (Arrhoges) californica'
- 'Aporrhais vetus belongs to Aporrhais'
- 'Arca (Nemodon) cumshewensis belongs to Arca (Nemodon)' according to Whiteaves 1900
- 'Arca (Nemodon) cumshewensis is recombined as Parallelodon (Nanonavis) cumshewensis'
- 'Arca (Nemodon) simillima belongs to Arca (Nemodon)' according to Whiteaves 1900
- 'Arca (Nemodon) simillima is recombined as Parallelodon (Nanonavis) simillima'
- 'Arca breweriana is recombined as Parallelodon (Nanonavis) brewerianus'
- 'Arca decurtata is a subjective synonym of Cucullaea (Idonearca) gravida'
- 'Arca gravida is recombined as Cucullaea (Idonearca) gravida'
- 'Arca vancouverensis is recombined as Parallelodon (Nanonavis) vancouverensis'
- 'Arca vancouverensis is recombined as Nemodon vancouverensis' according to Whiteaves 1879
- 'Astarte earllergyi belongs to Astarte'
- 'Astarte lapidis is recombined as Eriphyla lapidis'
- 'Astarte ovoides is recombined as Eriphyla ovoides'
- 'Astarte sulcata is replaced by Astarte earllergyi'
- 'Austiniceras was reranked as Puzosia (Austiniceras) and belongs to Puzosia'
- 'Avicula gainsana belongs to Avicula'
- 'Avicula roguensis belongs to Avicula'
- 'Baculites buttensis belongs to Baculites'
- 'Baculites lomaensis belongs to Baculites'
- 'Baculites rex belongs to Baculites'
- 'Baculites subcircularis belongs to Baculites'
- 'Beudanticeras alamoense belongs to Beudanticeras'
- 'Beudanticeras argonauticum belongs to Beudanticeras'
- 'Bostrychoceras buttense belongs to Bostrychoceras'
- 'Bostrychoceras californicum belongs to Bostrychoceras'
- 'Bostrychoceras columbianum belongs to Bostrychoceras'
- 'Bostrychoceras occidentale belongs to Bostrychoceras'
- 'Bostrychoceras puertoense belongs to Bostrychoceras'
- 'Bostrychoceras sanctaeanae belongs to Bostrychoceras'
- 'Bostrychoceras serpiens belongs to Bostrychoceras'
- 'Bostrychoceras trabucoense belongs to Bostrychoceras'
- 'Bullina yoloensis belongs to Bullina'
- 'Butticeras belongs to Mortoniceratidae'
- 'Butticeras buttense belongs to Butticeras'
- 'Butticeras studleyi belongs to Butticeras'
- 'Calliostoma radiatum belongs to Calliostoma'
- 'Calycoceras (Eucalycoceras) diabloense belongs to Calycoceras (Eucalycoceras)'
- 'Calycoceras (Metacalycoceras) auspicium belongs to Calycoceras (Metacalycoceras)'
- 'Canadoceras celeste belongs to Canadoceras'
- 'Canadoceras georgianum belongs to Canadoceras'
- 'Canadoceras whiteavesi belongs to Canadoceras'
- 'Cassidulus mercedensis belongs to Cassidulus'
- 'Cerithium (Fibula) detectum belongs to Cerithium (Fibula)' according to Stoliczka 1868
- 'Cerithium (Fibula) mustangense belongs to Cerithium (Fibula)'
- 'Cerithium clarki belongs to Cerithium'
- 'Cerithium suciaensis belongs to Cerithium'
- 'Coelopoceras hyatti belongs to Coelopoceras'
- 'Coilopoceras [misspelled as Coelopoceras] belongs to Coelopoceratidae'
- 'Coilopoceratidae [misspelled as Coelopoceratidae] belongs to Ammonoidea'
- 'Conchocele cretacea belongs to Conchocele' according to Whiteaves 1873
- 'Conchocele cretacea is recombined as Thyasira cretacea' according to Whiteaves 1903
- 'Conchocele cretacea is recombined as Thyasira cretacea'
- 'Crassatella elongata belongs to Crassatella'
- 'Crassatella lomana belongs to Crassatella'
- 'Crassatella mercedensis belongs to Crassatella'
- 'Cucullaea (Idonearca) alamoensis belongs to Cucullaea (Idonearca)'
- 'Cucullaea (Idonearca) buttensis belongs to Cucullaea (Idonearca)'
- 'Cucullaea (Idonearca) calabaza belongs to Cucullaea (Idonearca)'
- 'Cucullaea (Idonearca) melhaseana belongs to Cucullaea (Idonearca)'
- 'Cucullaea bowersiana is recombined as Trigonocallista bowersiana'
- 'Cucullaea cordiformis is recombined as Cucullaea (Idonearca) cordiformis'
- 'Cucullaea grossaforma is recombined as Cucullaea (Idonearca) grossaforma'
- 'Cucullaea lirata is recombined as Cucullaea (Idonearca) lirata'
- 'Cucullaea truncata is recombined as Cucullaea (Idonearca) truncata'
- 'Cucullaea youngi is recombined as Cucullaea (Idonearca) youngi'
- 'Cunningtoniceras roguense belongs to Cunningtoniceras'
- 'Cymatoceras was reranked as Nautilus (Cymatoceras) and belongs to Nautilus'
- 'Cymbophora buttensis belongs to Cymbophora'
- 'Cypraea argonautica belongs to Cypraea'
- 'Cypraea berryessae belongs to Cypraea'
- 'Cypraea fontana belongs to Cypraea'
- 'Cypraea gualalaensis belongs to Cypraea'
- 'Cyprina denmanensis belongs to Cyprina' according to Whiteaves 1903
- 'Cyprina denmanensis belongs to Cyprina'
- 'Cyrtochilus major belongs to Cyrtochilus'
- 'Cyrtochilus stylus belongs to Cyrtochilus'
- 'Desmoceras (Latidorsella) barryae belongs to Desmoceras (Latidorsella)'
- 'Desmoceras (Puzosia) dawsoni is recombined as Beudanticeras dawsoni'
- 'Desmoceras ashlandicum belongs to Desmoceras' according to Anderson 1902
- 'Desmoceras ashlandicum is recombined as Pachydiscus ashlandicus'
- 'Desmoceras colusaense is recombined as Puzosia (Parapuzosia) colusaensis'
- 'Desmophyllites siskiyouensis belongs to Desmophyllites'
- 'Desmophyllites yoloensis belongs to Desmophyllites'
- 'Didymoceras californicum belongs to Didymoceras'
- 'Didymoceras fresnoense belongs to Didymoceras'
- 'Didymoceras kernense belongs to Didymoceras'
- 'Didymoceras orestimbense belongs to Didymoceras'
- 'Didymoceras whiteavesi belongs to Didymoceras'
- 'Diplomoceras cascadense belongs to Diplomoceras'
- 'Diplomoceras jimboi belongs to Diplomoceras'
- 'Diplomoceras mercedense belongs to Diplomoceras'
- 'Diplomoceras mustangense belongs to Diplomoceras'
- 'Diplomoceras oshaughnessyi belongs to Diplomoceras'
- 'Diplomoceras vermiculare belongs to Diplomoceras'
- 'Drepanocheilus (Arrhoges) is reassigned into Anchura'
- 'Durania californica belongs to Durania'
- 'Echinocorys yoloensis belongs to Echinocorys'
- 'Endocostea was reranked as Inoceramus (Endocostea) and belongs to Inoceramus'
- 'Eupachydiscus arbucklensis belongs to Eupachydiscus'
- 'Eupachydiscus willgreeni belongs to Eupachydiscus'
- 'Exicrioceras belongs to Nostoceratidae'
- 'Exicrioceras diabloense belongs to Exicrioceras'
- 'Exicrioceras ortigalitense belongs to Exicrioceras'
- 'Exiteloceras bennisoni belongs to Exiteloceras'
- 'Exiteloceras desertense belongs to Exiteloceras'
- 'Exiteloceras ortigalitoense belongs to Exiteloceras'
- 'Exogyra californica belongs to Exogyra'
- 'Exogyra inornata belongs to Exogyra'
- 'Fagesia klamathensis belongs to Fagesia'
- 'Fagesia shastensis is recombined as Vascoceras shastense'
- 'Favites gabbi belongs to Favites'
- 'Fibula was reranked as Cerithium (Fibula) and belongs to Cerithium'
- 'Flaventia hornbyensis belongs to Flaventia'
- 'Fulguraria gabbi is recombined as Volutoderma gabbi'
- 'Fusus dakotensis belongs to Fusus' according to Meek and Hayden 1856
- 'Fusus dakotensis is recombined as Serrifusus dakotensis' according to Whiteaves 1879
- 'Gaudryceras was reranked as Lytoceras (Gaudryceras) and belongs to Lytoceras'
- 'Gaudryceras denmanense belongs to Gaudryceras' according to Whiteaves 1903
- 'Gaudryceras denmanense is recombined as Lytoceras (Gaudryceras) denmanense'
- 'Gaudryceras tenuiliratum is recombined as Lytoceras (Gaudryceras) tenuiliratum'
- 'Glycymeris banosensis belongs to Glycymeris'
- 'Glycymeris pentzana belongs to Glycymeris'
- 'Glycymeris shastensis belongs to Glycymeris'
- 'Gosavia biconica belongs to Gosavia'
- 'Gryphaea accipiter belongs to Gryphaea'
- 'Gryphaea distorta belongs to Gryphaea'
- 'Gyrodes was reranked as Natica (Gyrodes) and belongs to Natica'
- 'Gyrodes dowelli belongs to Gyrodes'
- 'Gyrodes siskiyouensis belongs to Gyrodes'
- 'Haliotis lomaensis belongs to Haliotis'
- 'Hamites (Ptychoceras) solanoense is recombined as Solenoceras solanoense'
- 'Hamites ellipticus is recombined as Diplomoceras ellipticum'
- 'Hamites glaber is recombined as Cyrtochilus glaber'
- 'Hamites obstrictus is recombined as Diplomoceras obstrictum'
- 'Hamites phoenixensis is recombined as Diplomoceras phoenixense'
- 'Hamites recticostatus is recombined as Diplomoceras recticostatum'
- 'Hamites vancouverensis is recombined as Exiteloceras vancouverense'
- 'Haploceras cumshewaensis is recombined as Kossmaticeras (Madrasites) cumshewaense'
- 'Hauericeras churchi belongs to Hauericeras'
- 'Hauericeras mickeyi belongs to Hauericeras'
- 'Helicoceras brewerii is recombined as Bostrychoceras brewerii'
- 'Helicoceras declive is recombined as Bostrychoceras declive'
- 'Helicoceras vermicularis is recombined as Bostrychoceras vermiculare'
- 'Heteroceras ceratopse is recombined as Hyphantoceras ceratopse'
- 'Heteroceras elongatum belongs to Heteroceras' according to Whiteaves 1903
- 'Heteroceras elongatum is recombined as Bostrychoceras elongatum'
- 'Heteroceras hornbyense is recombined as Nostoceras hornbyense'
- 'Holcodiscoides was reranked as Puzosia (Holcodiscoides) and belongs to Puzosia'
- 'Hoplites parva is recombined as Brancoceras parvum'
- 'Hoplites yakounensis is recombined as Placenticeras yakounense'
- 'Hyphantoceras irregulare belongs to Hyphantoceras'
- 'Hyphantoceras laqueum belongs to Hyphantoceras'
- 'Idonearca was reranked as Cucullaea (Idonearca) and belongs to Cucullaea'
- 'Inoceramus (Endocostea) stanislausensis belongs to Inoceramus (Endocostea)'
- 'Inoceramus adunca is corrected as Inoceramus aduncus and belongs to Inoceramus'
- 'Inoceramus chicoensis belongs to Inoceramus'
- 'Inoceramus contracostae belongs to Inoceramus'
- 'Inoceramus digitatus belongs to Inoceramus' according to Sowerby 1829
- 'Inoceramus duplicostatus belongs to Inoceramus'
- 'Inoceramus eolobatus belongs to Inoceramus'
- 'Inoceramus glennensis belongs to Inoceramus'
- 'Inoceramus jacksonensis belongs to Inoceramus'
- 'Inoceramus klamathensis belongs to Inoceramus'
- 'Inoceramus meekianus belongs to Inoceramus'
- 'Inoceramus mendocinoensis belongs to Inoceramus'
- 'Inoceramus schmidti belongs to Inoceramus' according to Sokolow 1914
- 'Inoceramus schmidti belongs to Inoceramus'
- 'Inoceramus subundatus belongs to Inoceramus'
- 'Inoceramus teshioensis belongs to Inoceramus' according to Nagao and Matsumoto 1939
- 'Inoceramus turgidus belongs to Inoceramus'
- 'Inoceramus undulatoplicatus belongs to Inoceramus'
- 'Joaquinites belongs to Desmoceratidae'
- 'Joaquinites fascicostatum belongs to Joaquinites'
- 'Kossmaticeras (Madrasites) voyanum belongs to Kossmaticeras (Madrasites)'
- 'Kotoceras frazierense belongs to Kotoceras'
- 'Kotoceras richardsoni belongs to Kotoceras'
- 'Kotoceras subsugatum belongs to Kotoceras'
- 'Lunatia (Gyrodes) conradiana is recombined as Natica (Gyrodes) conradiana'
- 'Lunatia avellana is recombined as Ampullina avellana'
- 'Lutraria truncata is recombined as Cymbophora truncata'
- 'Lyelliceras stanislausense belongs to Lyelliceras'
- 'Lysis californiensis belongs to Lysis'
- 'Lytoceras (Gaudryceras) aureum belongs to Lytoceras (Gaudryceras)'
- 'Lytoceras (Gaudryceras) birkhauseri belongs to Lytoceras (Gaudryceras)'
- 'Lytoceras (Gaudryceras) coalingense belongs to Lytoceras (Gaudryceras)'
- 'Lytoceras (Gaudryceras) delvallense belongs to Lytoceras (Gaudryceras)'
- 'Lytoceras (Gaudryceras) texanum belongs to Lytoceras (Gaudryceras)'
- 'Lytoceras (Tetragonites) henleyense belongs to Lytoceras (Tetragonites)'
- 'Lytoceras (Tetragonites) jacksonense belongs to Lytoceras (Tetragonites)'
- 'Lytoceras (Tetragonites) kernense belongs to Lytoceras (Tetragonites)'
- 'Lytoceras alamedense is recombined as Lytoceras (Gaudryceras) alamedense'
- 'Lytoceras alamedense belongs to Lytoceras' according to Smith 1889
- 'Mactra stantoni is recombined as Cymbophora stantoni'
- 'Madrasites was reranked as Kossmaticeras (Madrasites) and belongs to Kossmaticeras'
- 'Mammites rancheriae belongs to Mammites'
- 'Mantelliceras conquistador belongs to Mantelliceras'
- 'Mantelliceras oregonense belongs to Mantelliceras'
- 'Mantelliceras phoenixense belongs to Mantelliceras'
- 'Meretrix angulata is recombined as Etea angulata'
- 'Meretrix coronada belongs to Meretrix'
- 'Meretrix marshana belongs to Meretrix'
- 'Meretrix nitida major is recombined as Trigonocallista major'
- 'Metaplacenticeras bowersi belongs to Metaplacenticeras'
- 'Modiola cylindrica is recombined as Modiolus cylindricus'
- 'Mortoniceras (Submortoniceras) pentzanum belongs to Mortoniceras (Submortoniceras)'
- 'Mortoniceras (Submortoniceras) randalli belongs to Mortoniceras (Submortoniceras)'
- 'Mortoniceras crenulatum is recombined as Prionocycloceras crenulatum'
- 'Mortoniceratinae was reranked as the family Mortoniceratidae and belongs to Ammonoidea'
- 'Nautilus (Cymatoceras) carlottensis is recombined as Nautilus charlottensis'
- 'Nautilus (Cymatoceras) hermosus belongs to Nautilus (Cymatoceras)'
- 'Nautilus modestus belongs to Nautilus'
- 'Nemodon was reranked as Arca (Nemodon) and belongs to Arca' according to Whiteaves 1900
- 'Neocyrtochilus belongs to Lytoceratidae'
- 'Neocyrtochilus bryani belongs to Neocyrtochilus'
- 'Neokotoceras belongs to Desmoceratidae'
- 'Neokotoceras fresnoense belongs to Neokotoceras'
- 'Nerinea robertiana belongs to Nerinea'
- 'Nerinea stewarti belongs to Nerinea'
- 'Nonacteonina stephensoni belongs to Nonacteonina'
- 'Nostoceras mexicanum belongs to Nostoceras'
- 'Nowakites dobbinsi belongs to Nowakites'
- 'Nowakites klamathonis belongs to Nowakites'
- 'Nowakites puertoensis belongs to Nowakites'
- 'Nowakites rumseyensis belongs to Nowakites'
- 'Oregoniceras belongs to Prionotropidae'
- 'Oregoniceras argonautarum belongs to Oregoniceras'
- 'Oregoniceras condoni belongs to Oregoniceras'
- 'Oregoniceras jacksonense belongs to Oregoniceras'
- 'Oregoniceras jillsoni belongs to Oregoniceras'
- 'Oregoniceras normale belongs to Oregoniceras'
- 'Oregoniceras phoenixense belongs to Oregoniceras'
- 'Oxybeloceras biconstrictum belongs to Oxybeloceras'
- 'Oxybeloceras petrolense belongs to Oxybeloceras'
- 'Oxybeloceras taffi belongs to Oxybeloceras'
- 'Pachecocrinus belongs to Pentacrinidae'
- 'Pachecocrinus joaquinensis belongs to Pachecocrinus'
- 'Pachydiscus averilli belongs to Pachydiscus'
- 'Pachydiscus henleyensis is recombined as Parapachydiscus henleyensis'
- 'Pachydiscus oregonensis belongs to Pachydiscus'
- 'Pachydiscus rosewoodensis belongs to Pachydiscus'
- 'Parahoplites sjogreni belongs to Parahoplites' according to Anthula 1899
- 'Parallelodon (Nanonavis) belongs to Parallelodon'
- 'Parallelodon (Nanonavis) bremneri belongs to Parallelodon (Nanonavis)'
- 'Parallelodon (Nanonavis) nanainoenis belongs to Parallelodon (Nanonavis)'
- 'Parapachydiscus abbotti belongs to Parapachydiscus'
- 'Parapachydiscus bidwelli belongs to Parapachydiscus'
- 'Parapachydiscus coalingensis belongs to Parapachydiscus'
- 'Parapachydiscus cortinaensis belongs to Parapachydiscus'
- 'Parapachydiscus diabloensis belongs to Parapachydiscus'
- 'Parapachydiscus fascicostatus californicus belongs to Parapachydiscus fascicostatus' according to Yabe 1921
- 'Parapachydiscus fascicostatus californicus is recombined as Parapachydiscus californicus'
- 'Parapachydiscus gabbi belongs to Parapachydiscus'
- 'Parapachydiscus panochensis belongs to Parapachydiscus'
- 'Parapachydiscus peninsularis belongs to Parapachydiscus'
- 'Parapachydiscus princeps belongs to Parapachydiscus'
- 'Parapachydiscus stanislausensis belongs to Parapachydiscus'
- 'Parapuzosia was reranked as Puzosia (Parapuzosia) and belongs to Puzosia'
- 'Pectunculus pacificus is recombined as Glycymeris pacificus'
- 'Pentacrinidae belongs to Crinoidea'
- 'Pentacrinus fairbanksi belongs to Pentacrinus'
- 'Peroniceras quintoense belongs to Peroniceras'
- 'Peroniceras shastense belongs to Peroniceras'
- 'Pervinquieria furberi belongs to Pervinquieria'
- 'Pervinquieria gainesana belongs to Pervinquieria'
- 'Pervinquieria sylvana belongs to Pervinquieria'
- 'Pholadomya anaana is recombined as Liopistha anaana'
- 'Pholadomya diegoensis belongs to Pholadomya'
- 'Phylloceras gargantuum belongs to Phylloceras'
- 'Phylloceras pachecoense belongs to Phylloceras'
- 'Phylloceras vaculae belongs to Phylloceras'
- 'Placenticeras californicum is recombined as Metaplacenticeras californicum'
- 'Placenticeras pacificum is recombined as Metaplacenticeras pacificum'
- 'Placenticeras sanctaemonicae is recombined as Metaplacenticeras sanctaemonicae'
- 'Polinices gainesanus belongs to Polinices'
- 'Polinices mercedensis belongs to Polinices'
- 'Prionocyclus californicus belongs to Prionocyclus'
- 'Prionotropis casperi belongs to Prionotropis'
- 'Prionotropis hiltensis belongs to Prionotropis'
- 'Pseudogaleodea bennisoni belongs to Pseudogaleodea'
- 'Pseudomelania colusaensis belongs to Pseudomelania'
- 'Pugnellus hamulus is recombined as Pugnellus (Gymnarus) hamulus'
- 'Puzosia (Austiniceras) giganteum belongs to Puzosia (Austiniceras)'
- 'Puzosia (Eocanadoceras) belongs to Puzosia'
- 'Puzosia (Eocanadoceras) hannai belongs to Puzosia (Eocanadoceras)'
- 'Puzosia (Holcodiscoides) gorrilli belongs to Puzosia (Holcodiscoides)'
- 'Puzosia (Latidorsella) is reassigned into Desmoceras'
- 'Puzosia (Parapuzosia) arenaica belongs to Puzosia (Parapuzosia)'
- 'Puzosia (Parapuzosia) hearni belongs to Puzosia (Parapuzosia)'
- 'Puzosia (Parapuzosia) hindsi belongs to Puzosia (Parapuzosia)'
- 'Puzosia (Parapuzosia) klamathonae belongs to Puzosia (Parapuzosia)'
- 'Puzosia (Parapuzosia) waringi belongs to Puzosia (Parapuzosia)'
- 'Puzosia jimboi is replaced by Puzosia (Parapuzosia) waringi'
- 'Puzosia onona is recombined as Puzosia (Parapuzosia) onona'
- 'Puzosia weaveri is recombined as Puzosia (Holcodiscoides) weaveri'
- 'Remondia oregonensis belongs to Remondia'
- 'Remondia shastensis belongs to Remondia'
- 'Rhynchonella densleonis belongs to Rhynchonella'
- 'Ringinella polita is recombined as Acteon politus'
- 'Romaniceras hesperium belongs to Romaniceras'
- 'Scaphites perrini is recombined as Scaphites (Yezoites) perrini'
- 'Scaphites pittensis belongs to Scaphites'
- 'Schloenbachia bakeri is recombined as Prionotropis bakeri'
- 'Schloenbachia buttensis is recombined as Mortoniceras (Submortoniceras) buttense'
- 'Schloenbachia gabbi is recombined as Mortoniceras (Submortoniceras) gabbi'
- 'Schloenbachia knighteni is recombined as Oregoniceras knighteni'
- 'Schloenbachia multicosta is recombined as Oregoniceras multicostum'
- 'Schloenbachia oregonensis is recombined as Oregoniceras oregonense'
- 'Schloenbachia siskiyouensis is recombined as Oregoniceras siskiyouense'
- 'Schloenbachia tehamaensis is recombined as Pervinquieria tehamaensis'
- 'Schloenbachia templetoni belongs to Schloenbachia' according to Hall and Ambrose 1916
- 'Schloenbachia templetoni is recombined as Mortoniceras (Submortoniceras) templetoni'
- 'Schluteria diabloensis is recombined as Beudanticeras diabloense'
- 'Scobinella dilleri is recombined as Volutoderma dilleri'
- 'Serrifusus dakotensis vancouverensis belongs to Serrifusus dakotensis' according to Whiteaves 1879
- 'Serrifusus dakotensis vancouverensis is recombined as Serrifusus vancouverensis'
- 'Serrifusus joaquinensis belongs to Serrifusus'
- 'Solenoceras mexicanum belongs to Solenoceras'
- 'Stoliczkaia praecursor belongs to Stoliczkaia'
- 'Stomatia intermedia is recombined as Lysis intermedia'
- 'Stomatia suciensis carinifera belongs to Stomatia suciensis' according to Whiteaves 1879
- 'Stomatia suciensis carinifera is recombined as Lysis carinifera'
- 'Submortoniceras was reranked as Mortoniceras (Submortoniceras) and belongs to Mortoniceras'
- 'Syncyclonema latum belongs to Syncyclonema'
- 'Tellina (Sanguinolaria) whitneyi is recombined as Periplomya whitneyi'
- 'Tellina alisoensis belongs to Tellina'
- 'Tellina ooides is recombined as Legumen ooides'
- 'Tellina parilis [misspelled as Tellina paralis] belongs to Tellina'
- 'Tellina santana belongs to Tellina'
- 'Tornatella normalis is recombined as Nonacteonina normalis'
- 'Trajanella acuminata belongs to Trajanella'
- 'Trigonarca californica belongs to Trigonarca'
- 'Trigonarca excavata belongs to Trigonarca'
- 'Trigonarca jacksonensis belongs to Trigonarca'
- 'Trigonarca sectilis belongs to Trigonarca'
- 'Trigonia bowersiana belongs to Trigonia'
- 'Trigonia branneri belongs to Trigonia'
- 'Trigonia churchi belongs to Trigonia'
- 'Trigonia colusaensis belongs to Trigonia'
- 'Trigonia evansana oregona is recombined as Trigonia oregona'
- 'Trigonia evansana oregona belongs to Trigonia evansana' according to Packard 1921
- 'Trigonia klamathonia belongs to Trigonia'
- 'Trigonia melhasei belongs to Trigonia'
- 'Trigonia packardi belongs to Trigonia'
- 'Trigonia perrinsmithi belongs to Trigonia'
- 'Trigonia wheelerensis belongs to Trigonia'
- 'Trigonocallista buttensis belongs to Trigonocallista'
- 'Trigonocallista taffi belongs to Trigonocallista'
- 'Trochus (Anadema) gemiferus belongs to Trochus (Anadema)'
- 'Trochus (Oxystele) euryostomus belongs to Trochus (Oxystele)'
- 'Turrilites excelsus belongs to Turrilites'
- 'Turrilites petersoni belongs to Turrilites'
- 'Turritella chaneyi belongs to Turritella'
- 'Turritella hearni belongs to Turritella'
- 'Turritella parallela is recombined as Nerinea parallela'
- 'Turritella peninsularis belongs to Turritella'
- 'Turritella petersoni belongs to Turritella'
- 'Volutoderma crossi belongs to Volutoderma'
- 'Volutoderma jacksonensis belongs to Volutoderma'
- 'Volutoderma magna belongs to Volutoderma'
- 'Volutoderma santana belongs to Volutoderma'
- 'Yezoites was reranked as Scaphites (Yezoites) and belongs to Scaphites'