Opinions from P. R. Bjork 1970
- 'Borophaginae belongs to Canidae'
- 'Borophagus belongs to Borophaginae'
- 'Buisnictis belongs to Mephitinae'
- 'Caninae belongs to Canidae'
- 'Canis belongs to Caninae'
- 'Felinae belongs to Felidae'
- 'Felis belongs to Felinae'
- 'Felis lacustris belongs to Felis'
- 'Felis rexroadensis belongs to Felis'
- 'Ferinestrix belongs to Mellivorinae'
- 'Ferinestrix vorax belongs to Ferinestrix'
- 'Grisoninae belongs to Mustelidae'
- 'Ischyrosmilus belongs to Machairodontinae'
- 'Lutra (Satherium) ingens is recombined as Satherium ingens'
- 'Lutravus cookii is recombined as Trigonictis cookii'
- 'Lutravus idahoensis is recombined as Trigonictis idahoensis'
- 'Lutrinae belongs to Mustelidae'
- 'Machairodontinae belongs to Felidae'
- 'Machairodus belongs to Machairodontinae'
- 'Melinae belongs to Mustelidae'
- 'Mellivorinae belongs to Mustelidae'
- 'Mephitinae belongs to Mustelidae'
- 'Mustela belongs to Mustelinae'
- 'Mustela gazini is a subjective synonym of Mustela rexroadensis'
- 'Mustelinae belongs to Mustelidae'
- 'Satherium belongs to Lutrinae'
- 'Sminthosinis belongs to Grisoninae'
- 'Sminthosinis bowleri belongs to Sminthosinis'
- 'Taxidea belongs to Melinae'
- 'Tremarctinae belongs to Ursidae'
- 'Tremarctos belongs to Tremarctinae'
- 'Trigonictis belongs to Grisoninae'
- 'Trigonictis kansasensis is a subjective synonym of Trigonictis idahoensis'
- 'Ursinae belongs to Ursidae'
- 'Ursus abstrusus belongs to Ursus'