Opinions from W. D. Matthew and W. Granger 1921
- 'Acmeodon belongs to Cimolestidae'
- 'Acmeodon secans belongs to Acmeodon'
- 'Carpodaptes belongs to Primates'
- 'Carpodaptes aulacodon belongs to Carpodaptes'
- 'Ectypodus belongs to Ptilodontidae'
- 'Ectypodus musculus belongs to Ectypodus'
- 'Eoconodon belongs to Mesonychia'
- 'Eucosmodon belongs to Eucosmodontidae'
- 'Ignacius belongs to Plesiadapidae'
- 'Ignacius frugivorus belongs to Ignacius'
- 'Labidolemur belongs to Plesiadapidae'
- 'Labidolemur soricoides belongs to Labidolemur'
- 'Leptacodon belongs to Nyctitheriidae'
- 'Leptacodon tener belongs to Leptacodon'
- 'Mixoclaenus belongs to '
- 'Mixoclaenus encinensis belongs to Mixoclaenus'
- 'Navajovius belongs to Tarsiidae'
- 'Navajovius kohlhaasae belongs to Navajovius'
- 'Neoplagiaulax americanus is recombined as Eucosmodon americanus'
- 'Peradectes belongs to Didelphidae'
- 'Peradectes elegans belongs to Peradectes'
- 'Sarcothraustes is a subjective synonym of Triisodon'
- 'Sarcothraustes belongs to ' according to Matthew 1897
- 'Sarcothraustes is a subjective synonym of Mioclaenus' according to Cope 1888
- 'Sarcothraustes antiquus is recombined as Triisodon antiquus'
- 'Sarcothraustes antiquus belongs to Sarcothraustes' according to Osborn and Earle 1895
- 'Sarcothraustes antiquus is recombined as Mioclaenus antiquus' according to Cope 1888
- 'Sarcothraustes coryphaeus is a subjective synonym of Eoconodon heilprinianus'
- 'Sarcothraustes coryphaeus is a subjective synonym of Triisodon heilprinianus' according to Matthew 1897
- 'Sarcothraustes coryphaeus belongs to Sarcothraustes' according to Osborn and Earle 1895
- 'Thylacodon belongs to Didelphidae'
- 'Thylacodon pusillus belongs to Thylacodon'
- 'Triisodon biculminatus is a subjective synonym of Triisodon heilprinianus'
- 'Triisodon heilprinianus is recombined as Eoconodon heilprinianus'
- 'Triisodon heilprinianus is recombined as Mioclaenus heilprinianus' according to Cope 1888
- 'Xenacodon belongs to Leptictidae'
- 'Xenacodon mutilatus belongs to Xenacodon'