Opinions from T. E. Williamson and S. G. Lucas 1993
- 'Acmeodon hyoni is a subjective synonym of Acmeodon secans'
- 'Anisonchus cophater is recombined as Conacodon cophater'
- 'Arctocyonides mumak is recombined as Arctocyon mumak'
- 'Bomburia belongs to Mioclaenidae'
- 'Bryanictis is a subjective synonym of Protictis'
- 'Carsioptychus is a subjective synonym of Periptychus'
- 'Catathlaeus is a subjective synonym of Periptychus'
- 'Catathlaeus rhabdodon is a subjective synonym of Periptychus carinidens'
- 'Catopsalis johnstoni is a subjective synonym of Catopsalis foliatus'
- 'Catopsalis utahensis is a subjective synonym of Catopsalis fissidens'
- 'Chriacus inversus is recombined as Pentacodon inversus'
- 'Chriacus priscus is recombined as Loxolophus priscus'
- 'Chriacus ruetimeyerianus is a subjective synonym of Loxolophus pentacus'
- 'Chriacus schlosserianus is a subjective synonym of Chriacus baldwini'
- 'Chriacus truncatus is a subjective synonym of Chriacus baldwini'
- 'Claenodon is a subjective synonym of Arctocyon'
- 'Claenodon vecordensis is a subjective synonym of Arctocyon montanensis'
- 'Conacodon utahensis is a subjective synonym of Conacodon kohlbergeri'
- 'Conoryctes crassicuspis is recombined as Triisodon crassicuspis'
- 'Deltatherium durini is recombined as Prolimnocyon durini'
- 'Dracoclaenus is a subjective synonym of Protoselene'
- 'Dracoclaenus griphus is recombined as Protoselene griphus'
- 'Ectoconus majusculus is a subjective synonym of Ectoconus ditrigonus'
- 'Ellipsodon aequidens is a nomen dubium'
- 'Ellipsodon priscus is recombined as Bomburia priscus'
- 'Ellipsodon witkoi is a subjective synonym of Ellipsodon grangeri'
- 'Ellipsodon yotankae is a subjective synonym of Ellipsodon grangeri'
- 'Escatepos belongs to Periptychidae'
- 'Escatepos campi belongs to Escatepos'
- 'Fimbrethil is a subjective synonym of Oxyacodon'
- 'Fimbrethil ambaronae is a subjective synonym of Oxyacodon agapetillus'
- 'Haploconus corniculatus is a subjective synonym of Haploconus angustus'
- 'Haploconus entoconus is recombined as Conacodon entoconus'
- 'Haploconus entoconus is recombined as Conacodon entoconus' according to Matthew 1897
- 'Litomylus osceolae is a subjective synonym of Litomylus dissentaneus'
- 'Mckennatherium is a subjective synonym of Adunator'
- 'Metachriacus is a subjective synonym of Chriacus'
- 'Metachriacus provocator is a subjective synonym of Chriacus baldwini'
- 'Mimotricentes mirielae is a subjective synonym of Loxolophus hyattianus'
- 'Mioclaenus angustus is recombined as Haploconus angustus'
- 'Mioclaenus filholianus is a subjective synonym of Oxyclaenus simplex'
- 'Mioclaenus gaudrianus is recombined as Eoconodon gaudrianus'
- 'Mioclaenus lydekkerianus is a subjective synonym of Mioclaenus turgidus'
- 'Mioclaenus protogonioides is recombined as Desmatoclaenus protogonioides'
- 'Mioclaenus turgidunculus is recombined as Choeroclaenus turgidunculus'
- 'Mixoclaenus is a subjective synonym of Coriphagus'
- 'Mixoclaenus encinensis is recombined as Coriphagus encinensis'
- 'Mixodectes crassiusculus is a subjective synonym of Mixodectes pungens'
- 'Neoclaenodon is a subjective synonym of Arctocyon'
- 'Neoclaenodon latidens is recombined as Arctocyon latidens'
- 'Neoclaenodon montanensis is recombined as Arctocyon montanensis'
- 'Neoclaenodon procyonoides is recombined as Colpoclaenus procyonoides'
- 'Neoclaenodon silberlingi is a subjective synonym of Arctocyon montanensis'
- 'Oxyacodon priscilla belongs to Oxyacodon'
- 'Oxyacodon tecumsae is a subjective synonym of Mixodectes malaris'
- 'Oxyacodon tecumsae is a subjective synonym of Mixodectes malaris' according to Lucas 1986
- 'Pantinomia is a subjective synonym of Prothryptacodon'
- 'Pantinomia ambigua is recombined as Prothryptacodon ambiguus'
- 'Pantinomia hilli is recombined as Prothryptacodon hilli'
- 'Periptychus coarctatus belongs to Periptychus'
- 'Periptychus gilmorei is a subjective synonym of Periptychus carinidens'
- 'Periptychus gilmorei belongs to Periptychus' according to Gazin 1938
- 'Periptychus matthewi is a subjective synonym of Periptychus coarctatus'
- 'Periptychus superstes is a subjective synonym of Periptychus carinidens'
- 'Periptychus superstes is a subjective synonym of Periptychus carinidens' according to Simpson 1959
- 'Plagioptychus is a subjective synonym of Periptychus'
- 'Prolimnocyon macfaddeni is a subjective synonym of Prolimnocyon durini'
- 'Protictis vanvaleni belongs to Protictis'
- 'Protogonia plicifera is a subjective synonym of Tetraclaenodon puercensis'
- 'Protogonodon grangeri is a subjective synonym of Loxolophus stenognathus'
- 'Protogonodon stenognathus is recombined as Loxolophus stenognathus'
- 'Protoselene bombadili is recombined as Bubogonia bombadili'
- 'Puercolestes is a subjective synonym of Cimolestes'
- 'Puercolestes simpsoni is recombined as Cimolestes simpsoni'
- 'Sarcothraustes coryphaeus is recombined as Eoconodon coryphaeus'
- 'Simpsonictis is a subjective synonym of Protictis'
- 'Spanoxyodon is a subjective synonym of Chriacus'
- 'Spanoxyodon latrunculus is a subjective synonym of Chriacus baldwini'
- 'Talpohenach is a subjective synonym of Palaechthon'
- 'Talpohenach is a subjective synonym of Palaechthon' according to Szalay and Delson 1979
- 'Talpohenach torrejonius is recombined as Palaechthon torrejonius'
- 'Talpohenach torrejonius is recombined as Palaechthon torrejonius' according to Szalay and Delson 1979
- 'Thylacodon belongs to Didelphidae'
- 'Thylacodon pusillus belongs to Thylacodon'
- 'Tiznatzinia belongs to Mioclaenidae'
- 'Tiznatzinia belongs to Mioclaenidae' according to Cifelli 1983
- 'Tiznatzinia vanderhoofi belongs to Tiznatzinia'
- 'Tiznatzinia vanderhoofi belongs to Tiznatzinia' according to Cifelli 1983
- 'Torrejonia is a subjective synonym of Plesiolestes' according to Szalay and Delson 1979
- 'Torrejonia is a subjective synonym of Plesiolestes'
- 'Torrejonia wilsoni is recombined as Plesiolestes wilsoni'
- 'Tricentes is a subjective synonym of Chriacus'
- 'Tricentes crassicollidens is a subjective synonym of Chriacus baldwini'
- 'Triisodon belongs to Mesonychia'
- 'Triisodon assurgens is recombined as Microclaenodon assurgens'
- 'Triisodon heilprinianus is a nomen dubium'
- 'Triisodon levisianus is recombined as Goniacodon levisanus'
- 'Triisodon rusticus is a subjective synonym of Triisodon crassicuspis'