Opinions from V. J. Sach and E. P. J. Heizmann 2001
- 'Aceratheriinae belongs to Rhinocerotidae'
- 'Aceratheriini belongs to Aceratheriinae'
- 'Acrodelphidae belongs to Delphinoidea'
- 'Amphicyon belongs to Amphicyoninae'
- 'Amphicyon major belongs to Amphicyon'
- 'Amphicyonidae belongs to Carnivora'
- 'Amphimoschus belongs to Ruminantia'
- 'Amphimoschus ponteleviensis belongs to Amphimoschus'
- 'Anthracotheriidae belongs to Artiodactyla'
- 'Aphicyoninae belongs to Amphicyonidae'
- 'Aureliachoerus belongs to Hyotheriinae'
- 'Bunolistriodon belongs to Listriodontinae'
- 'Castoridae belongs to Rodentia'
- 'Cervidae belongs to Cervoidea'
- 'Cervoidea belongs to Ruminantia'
- 'Cynelos belongs to Amphicyoninae'
- 'Deinotheriidae belongs to Elephantiformes'
- 'Deinotherium belongs to Deinotheriidae'
- 'Deinotherium bavaricum belongs to Deinotherium' according to von Meyer 1831
- 'Delphinoidea belongs to Odontoceti'
- 'Diaceratherium belongs to Teleoceratini'
- 'Diceratherium belongs to Teleoceratini'
- 'Dorcatherium belongs to Tragulidae'
- 'Dorcatherium guntianum belongs to Dorcatherium'
- 'Dorcatherium naui belongs to Dorcatherium'
- 'Dorcatherium vindobonense belongs to Dorcatherium' according to von Meyer 1846
- 'Dugongidae belongs to Trichechiformes'
- 'Elephantiformes belongs to Proboscidea'
- 'Elomeryx belongs to Anthracotheriidae'
- 'Felidae belongs to Carnivora'
- 'Felinae belongs to Felidae'
- 'Fissipeda is a subjective synonym of Carnivora'
- 'Gomphotheriidae belongs to Elephantiformes'
- 'Gomphotherium belongs to Gomphotheriidae'
- 'Hyaenailurus sulzeri belongs to Hyaenailurus' according to Biedermann 1863
- 'Hyaenailurus sulzeri belongs to Hyaenailurus'
- 'Hyaenodontidae belongs to Creodonta'
- 'Hyaenailurus is a misspelling of Hyainailouros'
- 'Hyainailouros belongs to Hyaenodontidae'
- 'Hyotheriinae belongs to Suidae'
- 'Hyotherium belongs to Hyotheriinae'
- 'Hyotherium soemmeringi belongs to Hyotherium'
- 'Ligeromeryx belongs to Lagomerycidae'
- 'Listriodontinae belongs to Suidae'
- 'Metaxytherium belongs to Dugongidae'
- 'Mustelidae belongs to Carnivora'
- 'Odontoceti belongs to Cetacea'
- 'Palaeomerycidae belongs to Cervoidea'
- 'Palaeomeryx belongs to Palaeomerycidae'
- 'Palaeomeryx kaupi belongs to Palaeomeryx' according to von Meyer 1834
- 'Paratapirus belongs to Tapiridae'
- 'Physeteridae belongs to Odontoceti'
- 'Plesiaceratherium belongs to Aceratheriini'
- 'Procervulus belongs to Cervidae'
- 'Prosantorhinus belongs to Teleoceratini'
- 'Pseudaelurus belongs to Felinae'
- 'Pseudaelurus lorteti belongs to Pseudaelurus' according to Gaillard 1899
- 'Pseudaelurus lorteti belongs to Pseudaelurus'
- 'Rhinocerotidae belongs to Perissodactyla'
- 'Ruminantia belongs to Artiodactyla'
- 'Scaldicetus belongs to Physeteridae'
- 'Squalodontidae belongs to Odontoceti'
- 'Steneofiber belongs to Castoridae'
- 'Steneofiber depereti belongs to Steneofiber'
- 'Suidae belongs to Artiodactyla'
- 'Taperidae is corrected as Tapiridae and belongs to Perissodactyla'
- 'Teleoceratini belongs to Rhinocerotidae'
- 'Thaumastocyoninae belongs to Amphicyonidae'
- 'Tragulidae belongs to Cervoidea'
- 'Trichechiformes belongs to Sirenia'