Opinions from W. D. Matthew 1915
- 'Absarokius belongs to Omomyidae'
- 'Anaptomorphus abbotti is recombined as Absarokius abbotti'
- 'Anaptomorphus abbotti belongs to Anaptomorphus' according to Loomis 1906
- 'Anaptomorphus homunculus is recombined as Tetonius homunculus'
- 'Anaptomorphus homunculus belongs to Anaptomorphus' according to Cope 1882
- 'Arctostylops belongs to Arctostylopidae'
- 'Arctostylops steini belongs to Arctostylops'
- 'Cynodontomys angustidens belongs to Cynodontomys'
- 'Microsyops scottianus is recombined as Cynodontomys scottianus'
- 'Notharctus cingulatus is a subjective synonym of Cynodontomys latidens'
- 'Notharctus cingulatus belongs to Notharctus' according to Loomis 1906
- 'Notharctus minutus is recombined as Omomys minutus'
- 'Notharctus minutus belongs to Notharctus' according to Loomis 1906
- 'Notharctus palmidens is a subjective synonym of Cynodontomys latidens'
- 'Notharctus palmidens belongs to Notharctus' according to Loomis 1906
- 'Notharctus venticolus belongs to Notharctus'
- 'Nothodectes belongs to Apatemyidae'
- 'Nothodectes dubius belongs to Nothodectes'
- 'Omomys vespertinus belongs to Omomys'
- 'Pelycodus belongs to Adapidae'
- 'Pelycodus is a subjective synonym of Tomitherium' according to Cope 1876
- 'Pelycodus angulatus belongs to Pelycodus' according to Loomis 1906
- 'Pelycodus angulatus is a nomen dubium'
- 'Pelycodus frugivorus belongs to Pelycodus'
- 'Pelycodus frugivorus belongs to Pelycodus' according to Loomis 1906
- 'Pelycodus nunienum is recombined as Notharctus nunienus'
- 'Pelycodus ralstoni belongs to Pelycodus'
- 'Pelycodus trigonodus belongs to Pelycodus'
- 'Phenacolemur belongs to Paromomyidae'
- 'Phenacolemur citatus belongs to Phenacolemur'
- 'Phenacolemur praecox belongs to Phenacolemur'
- 'Prototomus jarrovii is recombined as Pelycodus jarrovii'
- 'Tetonius belongs to Omomyidae'
- 'Tetonius ambiguus belongs to Tetonius'
- 'Tomitherium tutum belongs to Tomitherium' according to Cope 1877
- 'Tomitherium tutum is recombined as Pelycodus tutus'
- 'Uintanius belongs to Omomyidae'
- 'Uintanius turriculorum belongs to Uintanius'