Opinions from E. D. Cope 1880
- 'Aelurogale belongs to Nimravidae'
- 'Archaelurus belongs to Nimravidae'
- 'Archaelurus debilis belongs to Archaelurus'
- 'Catolynx belongs to Felidae'
- 'Cynaelurus belongs to Felidae'
- 'Daptophilus squalidens is recombined as Dinictis squalidens'
- 'Deinictis is corrected as Dinictis and belongs to Nimravidae'
- 'Dinictis cyclops belongs to Dinictis'
- 'Dinictis felina belongs to Dinictis'
- 'Drepanodon belongs to Felidae'
- 'Eusmilus belongs to Nimravidae'
- 'Felis belongs to Felidae'
- 'Felis (Pseudaelurus) intrepidus is recombined as Pseudaelurus intrepidus'
- 'Felis atrox is recombined as Uncia atrox'
- 'Felis augustus is recombined as Uncia augusta'
- 'Felis fatalis is recombined as Smilodon fatalis'
- 'Felis spelaea belongs to Felis' according to Goldfuss 1810
- 'Felis spelaea is recombined as Uncia spelea'
- 'Hoplophoneus belongs to Nimravidae'
- 'Hoplophoneus platycopis is recombined as Pogonodon platycopis'
- 'Lynx belongs to Felidae'
- 'Machaerodus brachyops is recombined as Pogonodon brachyops'
- 'Machaerodus cerebralis is recombined as Hoplophoneus cerebralis'
- 'Machaerodus oreodontis is recombined as Hoplophoneus oreodontis'
- 'Machaerodus strigidens is recombined as Hoplophoneus strigidens'
- 'Machaerodus is a subjective synonym of Drepanodon'
- 'Machairodus necator belongs to Machairodus' according to Gervais 1880
- 'Machairodus necator belongs to Machairodus'
- 'Machairodus primaevus is recombined as Hoplophoneus primaevus'
- 'Megantereon megantereon is recombined as Drepanodon megantereon'
- 'Neofelis belongs to Felidae'
- 'Nimravini belongs to Nimravidae'
- 'Nimravus belongs to Nimravidae'
- 'Nimravus confertus belongs to Nimravus'
- 'Nimravus gomphodus belongs to Nimravus'
- 'Pogonodon belongs to Nimravidae'
- 'Proailurus [misspelled as Proaelurus] belongs to Nimravidae'
- 'Pseudaelurus belongs to Nimravidae'
- 'Pseudaelurus edwardsi belongs to Pseudaelurus' according to Filhol 1872
- 'Pseudaelurus edwardsi [misspelled as Pseudaelurus edvrdsi] belongs to Pseudaelurus'
- 'Smilodon belongs to Felidae'
- 'Uncia belongs to Felidae'
- 'Ursus cultridens is recombined as Drepanodon cultridens'