Opinions from W. D. Matthew 1897
- 'Anisonchus agapetillus is recombined as Oxyacodon agapetillus'
- 'Catathlaeus rhabdodon is recombined as Periptychus rhabdodon'
- 'Chriacus hyattianus is recombined as Protochriacus hyattianus'
- 'Chriacus priscus is recombined as Protochriacus priscus'
- 'Chriacus schlosserianus belongs to Chriacus'
- 'Chriacus simplex is recombined as Oxyclaenus simplex'
- 'Chriacus stenops is a subjective synonym of Chriacus pelvidens'
- 'Chriacus truncatus belongs to Chriacus'
- 'Deltatherium baldwini is recombined as Chriacus baldwini'
- 'Didymictis haydenianus belongs to Didymictis'
- 'Dissacus saurognathus belongs to Dissacus'
- 'Hyopsodus acolytus is recombined as Mioclaenus acolytus'
- 'Lipodectes pelvidens is recombined as Chriacus pelvidens'
- 'Loxolophus is a subjective synonym of Protochriacus'
- 'Mesonyx navajovius is recombined as Dissacus navajovius'
- '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 gaudrianus is recombined as Triisodon gaudrianus'
- 'Mioclaenus lemuroides belongs to Mioclaenus'
- 'Mioclaenus opisthacus is recombined as Protoselene opisthacus'
- 'Mioclaenus protogonioides is recombined as Claenodon protogoniodes'
- 'Mioclaenus subtrigonus is recombined as Tricentes subtrigonus'
- 'Mioclaenus turgidunculus belongs to Mioclaenus'
- 'Mioclaenus turgidus belongs to Mioclaenus'
- 'Oxyacodon apiculatus belongs to Oxyacodon'
- 'Periptychus carinidens belongs to Periptychus'
- 'Periptychus coarctatus belongs to Periptychus'
- 'Phenacodus puercensis is recombined as Euprotogonia puercensis'
- 'Phenacodus zuniensis is a subjective synonym of Tricentes subtrigonus'
- 'Protochriacus belongs to Oxyclaenidae'
- 'Protochriacus attenuatus belongs to Protochriacus'
- 'Protogonodon stenognathus belongs to Protogonodon'
- 'Protoselene belongs to Mioclaenidae'
- 'Sarcothraustes antiquus belongs to Sarcothraustes'
- 'Tricentes crassicollidens belongs to Tricentes'
- 'Tricentes inaequidens is recombined as Mioclaenus inaequidens'
- 'Triisodon heilprinianus belongs to Triisodon'
- 'Triisodon levisianus is recombined as Goniacodon levisanus'
- 'Triisodon quivirensis belongs to Triisodon'