Opinions from J. J. Eberle 2003
- 'Anisonchus coniferus is a subjective synonym of Conacodon entoconus'
- 'Baioconodon belongs to Loxolophinae'
- 'Baioconodon denverensis belongs to Baioconodon'
- 'Baioconodon jeffersonensis belongs to Baioconodon'
- 'Catopsalis belongs to Taeniolabididae'
- 'Catopsalis alexanderi belongs to Catopsalis'
- 'Chriacus simplex is recombined as Oxyclaenus simplex'
- 'Conacodon belongs to Conacodontinae'
- 'Ectoconus belongs to Periptychinae'
- 'Haploconus belongs to Anisonchinae'
- '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 Gazin 1941
- 'Haploconus inopinatus is a subjective synonym of Haploconus angustus'
- 'Haploconus inopinatus belongs to Haploconus' according to Gazin 1939
- 'Loxolophinae belongs to Arctocyonidae'
- 'Loxolophus belongs to Loxolophinae'
- 'Loxolophus faulkneri belongs to Loxolophus'
- 'Oxyacodon belongs to Conacodontinae'
- 'Oxyclaenidae belongs to Procreodi'
- 'Oxyclaenus belongs to Oxyclaenidae'
- 'Periptychus belongs to Periptychinae'
- 'Periptychus brabensis is a subjective synonym of Periptychus coarctatus'
- 'Periptychus coarctatus belongs to Periptychus'
- 'Periptychus ditrigonus is recombined as Ectoconus ditrigonus'
- 'Plagioptychus matthewi is a subjective synonym of Periptychus coarctatus'
- 'Procreodi belongs to Ungulata'
- 'Promioclaenus wilsoni is recombined as Valenia wilsoni'
- 'Protungulatum belongs to Ungulata'
- 'Protungulatum donnae belongs to Protungulatum'