Opinions from W. D. Matthew 1937
- 'Anisonchus agapetillus is recombined as Oxyacodon agapetillus'
- 'Anisonchus apiculatus is a subjective synonym of Anisonchus gillianus'
- 'Anisonchus coniferus is a subjective synonym of Conacodon entoconus'
- 'Anisonchus coniferus belongs to Anisonchus' according to Coper 1882
- 'Anisonchus cophater is recombined as Conacodon cophater'
- 'Catathlaeus is a subjective synonym of Periptychus'
- 'Catathlaeus is a subjective synonym of Periptychus' according to Cope 1884
- 'Catathlaeus is a subjective synonym of Periptychus' according to Cope 1882
- 'Catathlaeus rhabdodon is recombined as Periptychus rhabdodon'
- 'Catathlaeus rhabdodon is recombined as Periptychus rhabdodon' according to Simons 1963
- 'Catathlaeus rhabdodon is recombined as Periptychus rhabdodon' according to Cope 1884
- 'Catopsalis belongs to Taeniolabididae'
- 'Catopsalis fissidens belongs to Catopsalis'
- 'Catopsalis foliatus belongs to Catopsalis'
- 'Catopsalis pollux is a subjective synonym of Taeniolabis taoensis'
- 'Chirox is a subjective synonym of Ptilodus'
- 'Chirox plicatus is a subjective synonym of Ptilodus mediaevus'
- 'Chriacus hyattianus is recombined as Loxolophus hyattianus'
- 'Chriacus inversus is recombined as Pentacodon inversus'
- 'Chriacus priscus is recombined as Loxolophus priscus'
- 'Chriacus ruetimeyerianus is recombined as Protogonodon ruetimeyerianus'
- 'Chriacus ruetimeyerianus is recombined as Mioclaenus ruetimeyerianus' according to Matthew 1897
- 'Chriacus schlosserianus is a subjective synonym of Chriacus truncatus'
- 'Chriacus schlosserianus belongs to Chriacus' according to Osborn and Earle 1895
- 'Chriacus simplex is recombined as Oxyclaenus simplex'
- 'Chriacus stenops is a subjective synonym of Chriacus pelvidens'
- 'Conoryctes crassicuspis is recombined as Triisodon crassicuspis'
- 'Deltatherium baldwini is recombined as Chriacus baldwini'
- 'Deltatherium baldwini is recombined as Chriacus baldwini' according to Osborn and Earle 1895
- 'Deltatherium baldwini is a subjective synonym of Chriacus pelvidens' according to Rigby 1976
- 'Deltatherium interruptum is a nomen dubium'
- 'Diacodon puercensis is recombined as Prodiacodon puercensis'
- 'Didymictis belongs to Viverravidae'
- 'Didymictis haydenianus belongs to Didymictis'
- 'Didymictis primus is a subjective synonym of Didymictis haydenianus'
- 'Dissacus carnifex is a subjective synonym of Dissacus navajovius'
- 'Dissacus carnifex is a subjective synonym of Dissacus navajovius' according to Matthew 1897
- 'Ectoconus belongs to Periptychidae'
- 'Ectoconus belongs to Periptychidae' according to Osborn and Earle 1895
- 'Ectoconus belongs to Periptychidae' according to Cope 1888
- 'Ectoconus is a subjective synonym of Conoryctes' according to Cope 1885
- 'Ectoconus belongs to Periptychidae' according to Cope 1884
- 'Ectoconus majusculus belongs to Ectoconus'
- 'Ellipsodon belongs to Mioclaenidae'
- 'Ellipsodon is a subjective synonym of Mioclaenus' according to Matthew 1897
- 'Ellipsodon aequidens belongs to Ellipsodon'
- 'Ellipsodon priscus belongs to Ellipsodon'
- 'Epichriacus is a subjective synonym of Chriacus'
- 'Epichriacus is a subjective synonym of Chriacus' according to Matthew 1897
- 'Euprotogonia is a subjective synonym of Tetraclaenodon'
- 'Euprotogonia belongs to ' according to Cope 1893
- 'Haploconus gillianus is recombined as Anisonchus gillianus'
- 'Haploconus lineatus is a subjective synonym of Haploconus angustus'
- 'Haploconus xiphodon is a subjective synonym of Haploconus angustus'
- 'Haploconus xiphodon is a subjective synonym of Haploconus angustus' according to Matthew 1897
- 'Hemiganus is a subjective synonym of Psittacotherium' according to Wortman 1897
- 'Hemiganus is a subjective synonym of Psittacotherium'
- 'Hemiganus otariidens is recombined as Wortmania otariidens'
- 'Hemiganus vultuosus is a subjective synonym of Psittacotherium multifragum'
- 'Hemiganus vultuosus is a subjective synonym of Psittacotherium multifragum' according to Wortman 1897
- 'Hemithlaeus kowalevskianus belongs to Hemithlaeus'
- 'Hexodon is a subjective synonym of Conoryctes'
- 'Hexodon is a subjective synonym of Conoryctes' according to Cope 1888
- 'Hexodon belongs to ' according to Cope 1884
- 'Hexodon molestus is a subjective synonym of Conoryctes comma'
- 'Hexodon molestus is a subjective synonym of Conoryctes comma' according to Cope 1888
- 'Hexodon molestus belongs to Hexodon' according to Cope 1884
- 'Hyopsodus acolytus is recombined as Ellipsodon acolytus'
- 'Indrodon is a subjective synonym of Mixodectes'
- 'Indrodon malaris is recombined as Mixodectes malaris'
- 'Limnocyon protenus is recombined as Didymictis protenus'
- 'Lipodectes belongs to ' according to Cope 1881
- 'Lipodectes is a subjective synonym of Deltatherium'
- 'Lipodectes pelvidens is recombined as Chriacus pelvidens'
- 'Lipodectes penetrans is a subjective synonym of Deltatherium fundaminis'
- 'Lipodectes penetrans belongs to Lipodectes' according to Cope 1881
- 'Loxolophus belongs to Arctocyonidae'
- 'Loxolophus adapinus is a subjective synonym of Loxolophus hyattianus'
- 'Loxolophus adapinus is a subjective synonym of Loxolophus hyattianus' according to Scott 1892
- 'Loxolophus adapinus is a subjective synonym of Protochriacus hyattianus' according to Matthew 1897
- 'Loxolophus adapinus is a subjective synonym of Chriacus hyattianus' according to Cope 1888
- 'Mesonyx navajovius is recombined as Dissacus navajovius'
- 'Miacis belongs to Miacidae'
- 'Miacis parvivorus belongs to Miacis'
- 'Mioclaenus angustus is recombined as Haploconus angustus'
- 'Mioclaenus baldwini is a subjective synonym of Protoselene opisthacus'
- 'Mioclaenus bathygnathus is a subjective synonym of Eoconodon heilprinianus'
- 'Mioclaenus bathygnathus is a subjective synonym of Triisodon heilprinianus' according to Matthew 1897
- 'Mioclaenus bucculentus is a subjective synonym of Tricentes subtrigonus'
- 'Mioclaenus corrugatus is recombined as Claenodon corrugatus'
- 'Mioclaenus cuspidatus is recombined as Oxyclaenus cuspidatus'
- 'Mioclaenus ferox is recombined as Claenodon ferox'
- 'Mioclaenus filholianus is recombined as Carcinodon filholianus'
- 'Mioclaenus floverianus is a subjective synonym of Tetraclaenodon puercensis'
- 'Mioclaenus gaudrianus is recombined as Eoconodon gaudrianus'
- 'Mioclaenus lemuroides is recombined as Ellipsodon lemuroides'
- 'Mioclaenus mandibularis is a subjective synonym of Anisonchus sectorius'
- 'Mioclaenus minimus is a subjective synonym of Ellipsodon acolytus'
- 'Mioclaenus opisthacus is recombined as Protoselene opisthacus'
- 'Mioclaenus pentacus is recombined as Protogonodon pentacus'
- 'Mioclaenus pentacus is recombined as Protogonodon pentacus' according to Matthew 1897
- 'Mioclaenus pentacus is recombined as Protogonodon pentacus' according to Osborn and Earle 1895
- 'Mioclaenus pentacus is recombined as Protogonodon pentacus' according to Earle 1893
- 'Mioclaenus protogonioides is recombined as Protogonodon protogonioides'
- 'Mioclaenus sectorius is recombined as Anisonchus sectorius'
- 'Mioclaenus subtrigonus is recombined as Tricentes subtrigonus'
- 'Mioclaenus subtrigonus is recombined as Tricentes subtrigonus' according to Scott 1892
- 'Mioclaenus turgidunculus is recombined as Oxyacodon turgidunculus'
- 'Mioclaenus zittelianus is a subjective synonym of Mioclaenus turgidus'
- 'Mioclaenus zittelianus is a subjective synonym of Mioclaenus turgidus' according to Matthew 1897
- 'Neoclaenodon procyonoides belongs to Neoclaenodon'
- 'Neoplagiaulax americanus is recombined as Eucosmodon americanus'
- 'Neoplagiaulax molestus is recombined as Eucosmodon molestus'
- 'Olbodotes is a subjective synonym of Mixodectes'
- 'Olbodotes copei is a subjective synonym of Mixodectes pungens'
- 'Oxyacodon priscilla belongs to Oxyacodon'
- 'Palaeictops is a subjective synonym of Diacodon'
- 'Palaeolestes is a subjective synonym of Prodiacodon'
- 'Pelycodus angulatus is recombined as Cynodontomys angulatus'
- 'Pentacodon occultus belongs to Pentacodon'
- 'Periptychus brabensis is a subjective synonym of Periptychus coarctatus'
- 'Periptychus coarctatus belongs to Periptychus'
- 'Periptychus ditrigonus is recombined as Ectoconus ditrigonus' according to Cope 1884
- 'Periptychus ditrigonus is recombined as Conoryctes ditrigonus' according to Cope 1885
- 'Periptychus ditrigonus is recombined as Conoryctes ditrigonus' according to Cope 1883
- 'Periptychus ditrigonus is recombined as Ectoconus ditrigonus'
- 'Periptychus ditrigonus is recombined as Ectoconus ditrigonus' according to Osborn and Earle 1895
- 'Periptychus superstes is a subjective synonym of Periptychus rhabdodon'
- 'Periptychus superstes belongs to Periptychus' according to Matthew 1935
- 'Phenacodus calceolatus is a subjective synonym of Tetraclaenodon puercensis'
- 'Phenacodus puercensis is recombined as Tetraclaenodon puercensis'
- 'Phenacodus zuniensis is a subjective synonym of Tricentes subtrigonus'
- 'Plagioptychus is a subjective synonym of Periptychus'
- 'Polymastodon is a subjective synonym of Taeniolabis'
- 'Polymastodon attenuatus is a subjective synonym of Taeniolabis taoensis'
- 'Polymastodon latimolis is a subjective synonym of Taeniolabis taoensis'
- 'Polymastodon selenodus is a subjective synonym of Taeniolabis taoensis'
- 'Polymastodon taoensis is recombined as Taeniolabis taoensis'
- 'Protochriacus is a subjective synonym of Loxolophus'
- 'Protochriacus attenuatus is a subjective synonym of Loxolophus hyattianus'
- 'Protochriacus attenuatus belongs to Protochriacus' according to Osborn and Earle 1895
- 'Protogonia is a subjective synonym of Tetraclaenodon'
- 'Protogonia belongs to ' according to Cabrerea 1935
- 'Protogonia is a subjective synonym of Euprotogonia' according to Cope 1893
- 'Protogonia plicifera is recombined as Tetraclaenodon pliciferus'
- 'Protogonia subquadrata is recombined as Tetraclaenodon subquadratus'
- 'Protogonia subquadrata is recombined as Euprotogonia subquadrata' according to Cope 1893
- 'Protogonia subquadrata is a subjective synonym of Protogonia puercensis' according to Cope 1888
- 'Protogonodon kimbetovius belongs to Protogonodon'
- 'Psittacotherium aspasiae belongs to Psittacotherium'
- 'Sarcothraustes is a subjective synonym of Triisodon'
- 'Sarcothraustes antiquus is recombined as Triisodon antiquus'
- 'Sarcothraustes coryphaeus is a subjective synonym of Eoconodon heilprinianus'
- 'Taeniolabis scalper is a nomen dubium'
- 'Taeniolabis sulcatus is a nomen dubium'
- 'Tetraclaenodon belongs to Phenacodontidae'
- 'Tricentes inaequidens is recombined as Ellipsodon inaequidens'
- 'Triisodon assurgens is recombined as Microclaenodon assurgens'
- 'Triisodon assurgens is recombined as Mioclaenus assurgens' according to Cope 1888
- 'Triisodon biculminatus is a subjective synonym of Triisodon heilprinianus'
- 'Triisodon conidens is a subjective synonym of Triisodon antiquus'
- 'Triisodon conidens is a subjective synonym of Sarcothraustes antiquus' according to Matthew 1897
- 'Triisodon conidens belongs to Triisodon' according to Cope 1882
- 'Triisodon heilprinianus is recombined as Eoconodon heilprinianus'
- 'Triisodon levisianus is recombined as Goniacodon levisanus'
- 'Triisodon levisianus is recombined as Mioclaenus levisanus' according to Cope 1888
- 'Triisodon rusticus is a subjective synonym of Triisodon crassicuspis'
- 'Triisodon rusticus is recombined as Mioclaenus rusticus' according to Cope 1888
- 'Triisodontidae was reranked as the subfamily Triisodontinae and belongs to Mesonychidae'
- 'Zetodon is a subjective synonym of Hemithlaeus'
- 'Zetodon is a subjective synonym of Hemithlaeus' according to Matthew 1897