Opinions from R. M. Hunt 1998
- 'Aelurodon johnhenryi is recombined as Phoberocyon johnhenryi'
- 'Agriotherium belongs to Ursavini'
- 'Agriotherium sivalensis belongs to Agriotherium'
- 'Allocyon belongs to Amphicynodontinae'
- 'Amphicynodon belongs to Amphicynodontinae'
- 'Amphicynodontinae belongs to Ursidae'
- 'Amphicyon aurelianensis belongs to Amphicyon' according to Mayet 1908
- 'Amphicyon aurelianensis is recombined as Phoberocyon aurelianensis'
- 'Amphicyon aurelianensis is recombined as Phoberocyon aurelianensis' according to Ginsburg 1955
- 'Campylocynodon is a subjective synonym of Parictis'
- 'Campylocynodon personi is recombined as Parictis personi'
- 'Canis ursinus is recombined as Plithocyon ursinus'
- 'Cephalogale belongs to Hemicyoninae'
- 'Cephalogale geoffroyi belongs to Cephalogale' according to Filhol 1879
- 'Hemicyon barstowensis is recombined as Plithocyon barstowensis'
- 'Hemicyon californicus is a subjective synonym of Plithocyon barstowensis'
- 'Hemicyoninae belongs to Ursidae'
- 'Indarctos belongs to Ursavini'
- 'Indarctos salmontanus belongs to Indarctos'
- 'Kolponomos belongs to Amphicynodontinae'
- 'Parictis belongs to Amphicynodontinae'
- 'Parictis dakotensis belongs to Parictis'
- 'Parictis gilpini belongs to Parictis'
- 'Parictis major belongs to Parictis'
- 'Parictis montanus belongs to Parictis'
- 'Parictis parvus belongs to Parictis'
- 'Parictis primaevus belongs to Parictis'
- 'Phoberocyon belongs to Hemicyoninae'
- 'Phoberocyon huerzeleri belongs to Phoberocyon' according to Ginsburg 1955
- 'Phoberocyon huerzeleri belongs to Phoberocyon'
- 'Plionarctos belongs to Tremarctini'
- 'Plionarctos edensis belongs to Plionarctos'
- 'Plithocyon belongs to Hemicyoninae'
- 'Plithocyon armagnacensis belongs to Plithocyon' according to Ginsburg 1955
- 'Plithocyon armagnacensis belongs to Plithocyon'
- 'Subparictidae is an invalid subgroup of Ursidae'
- 'Subparictis is a subjective synonym of Parictis'
- 'Tremarctini belongs to Ursinae'
- 'Tremarctos belongs to Tremarctini'
- 'Ursavini belongs to Ursinae'
- 'Ursavus belongs to Ursavini'
- 'Ursavus brevirhinus belongs to Ursavus'
- 'Ursidae belongs to Arctoidea'
- 'Ursinae belongs to Ursidae'
- 'Ursini belongs to Ursinae'
- 'Ursus belongs to Ursini'
- 'Ursus arctos belongs to Ursus'
- 'Ursus ornatus is recombined as Tremarctos ornatus'
- 'Ursus ornatus belongs to Ursus' according to Cuvier 1825
- 'Ursus ornatus is recombined as Tremarctos ornatus' according to Gervais 1855