Opinions from C. L. Gazin 1962
- 'Amaramnis belongs to Pantolestidae'
- 'Amaramnis gregoryi belongs to Amaramnis'
- 'Apatemys hurzeleri belongs to Apatemys'
- 'Bathmodon semicinctus is a subjective synonym of Coryphodon radians'
- 'Hyopsodus browni belongs to Hyopsodus'
- 'Hyopsodus lemoinianus is a nomen vanum'
- 'Hyopsodus powellianus is a nomen dubium'
- 'Hyopsodus powellianus belongs to Hyopsodus' according to Cope 1884
- 'Loxolophodon is a subjective synonym of Coryphodon'
- 'Metalophodon is a subjective synonym of Coryphodon'
- 'Metalophodon is a subjective synonym of Coryphodon' according to Osborn 1898
- 'Metalophodon belongs to ' according to Cope 1872
- 'Mioclaenus etsagicus is recombined as Bunophorus etsagicus'
- 'Omomys sheai belongs to Omomys'
- 'Omomys vespertinus belongs to Omomys'
- 'Orotherium index is a subjective synonym of Hyracotherium vasacciense'
- 'Orotherium index is a subjective synonym of Hyracotherium vasacciense' according to Kitts 1956
- 'Orotherium index is a subjective synonym of Pliolophus uintanus' according to Cope 1886
- 'Orotherium index is a subjective synonym of Orotherium uintanum' according to Cope 1875
- 'Paratetonius is a subjective synonym of Tetonius'
- 'Paratetonius steini is a subjective synonym of Tetonius homunculus'
- 'Paratetonius sublettensis is recombined as Anemorhysis sublettensis'
- 'Pelycodus nunienum is recombined as Notharctus nunienus'
- 'Pelycodus praetutus belongs to Pelycodus'
- 'Peratherium morrisi belongs to Peratherium'
- 'Tetonius musculus is recombined as Anemorhysis musculus'
- 'Tetonius tenuiculus is recombined as Tetonoides tenuiculus'
- 'Tetonoides belongs to '
- 'Tetonoides pearcei belongs to Tetonoides'
- 'Tillomys senior is recombined as Knightomys senior'
- 'Tomitherium tutum is recombined as Pelycodus tutus'