Opinions from W. D. Matthew and W. Granger 1915
- 'Ambloctonus hyaenoides belongs to Ambloctonus'
- 'Ambloctonus priscus belongs to Ambloctonus'
- 'Anacodon cultridens belongs to Anacodon'
- 'Chriacus gallinae belongs to Chriacus'
- 'Didymictis belongs to Viverravidae'
- 'Didymictis curtidens is a subjective synonym of Didymictis protenus'
- 'Didymictis dawkinsianus is recombined as Viverravus dawkinsianus'
- 'Didymictis leptomylus is a subjective synonym of Didymictis protenus'
- 'Didymictis leptomylus belongs to Didymictis' according to Cope 1880
- 'Didymictis massetericus is recombined as Uintacyon massetericus'
- 'Dipsalidictis belongs to Oxyaenidae'
- 'Dipsalidictis platypus belongs to Dipsalidictis'
- 'Dissacus leptognathus is recombined as Hapalodectes leptognathus'
- 'Dissacus praenuntius belongs to Dissacus'
- 'Limnocyon protenus is recombined as Didymictis protenus'
- 'Lipodectes pelvidens is recombined as Chriacus pelvidens'
- 'Lipodectes pelvidens is recombined as Chriacus pelvidens' according to Cope 1883
- 'Lipodectes pelvidens belongs to Lipodectes' according to Cope 1881
- 'Miacis brevirostris is a subjective synonym of Vulpavus canavus'
- 'Miacis canavus is recombined as Vulpavus canavus'
- 'Miacis exiguus belongs to Miacis'
- 'Miacis latidens belongs to Miacis'
- 'Oxyaena aequidens belongs to Oxyaena'
- 'Oxyaena gulo belongs to Oxyaena'
- 'Oxyaena huerfanensis is a subjective synonym of Oxyaena lupina'
- 'Oxyaena huerfanensis belongs to Oxyaena' according to Osborn 1897
- 'Oxyaena morsitans is a subjective synonym of Oxyaena lupina'
- 'Oxyaena morsitans belongs to Oxyaena' according to Cope 1874
- 'Oxyaena pardalis belongs to Oxyaena'
- 'Oxyaena transiens belongs to Oxyaena'
- 'Pachyaena gracilis belongs to Pachyaena'
- 'Pachyaena intermedia is a subjective synonym of Pachyaena ossifraga'
- 'Pachyaena intermedia belongs to Pachyaena' according to Wortman 1899
- 'Pachyaena ossifraga belongs to Pachyaena'
- 'Patriofelis coloradensis is recombined as Ambloctonus coloradensis'
- 'Prolimnocyon belongs to Limnocyonidae'
- 'Prolimnocyon antiquus belongs to Prolimnocyon'
- 'Prolimnocyon atavus belongs to Prolimnocyon'
- 'Prolimnocyon robustus belongs to Prolimnocyon'
- 'Protopsalis is a subjective synonym of Patriofelis'
- 'Prototomus is a subjective synonym of Sinopa'
- 'Prototomus multicuspis is recombined as Sinopa multicuspis'
- 'Prototomus secundarius is recombined as Sinopa secundaria'
- 'Prototomus strenuus is recombined as Sinopa strenua'
- 'Prototomus strenuus is recombined as Sinopa strenua' according to Matthew 1901
- 'Prototomus strenuus is recombined as Sinopa strenua' according to Matthew 1899
- 'Prototomus strenuus is recombined as Stypolophus strenuus' according to Cope 1881
- 'Prototomus strenuus is recombined as Stypolophus strenuus' according to Cope 1880
- 'Prototomus strenuus is recombined as Stypolophus strenuus' according to Cope 1877
- 'Prototomus viverrinus is recombined as Sinopa viverrina'
- 'Sinopa mordax belongs to Sinopa'
- 'Sinopa shoshoniensis belongs to Sinopa'
- 'Sinopa vulpecula belongs to Sinopa'
- 'Stypolophus is a subjective synonym of Sinopa'
- 'Stypolophus hians is recombined as Sinopa hians'
- 'Stypolophus pungens is recombined as Sinopa pungens'
- 'Stypolophus whitiae is recombined as Tritemnodon whitiae'
- 'Thryptacodon belongs to Oxyclaenidae'
- 'Thryptacodon antiquus belongs to Thryptacodon'
- 'Thryptacodon olseni belongs to Thryptacodon'
- 'Uintacyon promicrodon is recombined as Vassacyon promicrodon'
- 'Viverravus acutus belongs to Viverravus'
- 'Viverravus politus belongs to Viverravus'
- 'Vulpavus australis belongs to Vulpavus'