Due to some extinct mammals have no definite presentday relatives, they are compared to living mammals by the their appearances

mya: million years ago

Alticamelus, American lion, Arctotherium, Argyrolagus, Arsinoitherium, Astrapotherium, Barbary lion, Barylambda, Barytherium, Brontotherium, Chalicotherium, Coryphodon, Daeodon, Deinogalerix, Deinotherium, Diadiaphorus, Dinoceras, Diprotodon, Doedicurus, Dorcatherium, Elasmotherium, Embolotherium, Entelodon, Eurohippus, Hypohippus, Hyracodon, Imperial mammoth, Kyptoceras, Macrauchenia, Mastodon, Megatherium, Menoceras, Orohippus, Palaeoloxodon namadicus, Palaeomastodon, Pantolambda, Paraceratherium, Paraentelodon, Pliauchenia, Procoptodon, Pyrotherium, Smilodon, Stegotetrabelodon, Steppe mammoth, Subhyracodon, Uintatherium, Woolly mammoth


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