Prehistoric families
Agriochoeridae
Anoplotheriidae
Anoplotherium
Anthracotheriidae
Anthracotherium
Bothriodon
Brachyodus
Elomeryx
Merycopotamus
Cainotheriidae
Cainotherium
Choeropotamidae
Dichobunidae
Diacodexis
Entelodontidae
Archaeotherium
Daeodon
Dinohyus
Entelodon
Paraentelodon
Hypertragulidae
Bachitherium
Leptomerycidae
Archaeomeryx
Leptomeryx
Merycoidodontidae
Brachycrus
Merycoidodon
Mesoreodon
Oromerycidae
Protylopus
Palaeomerycidae
Climacoeras
Cranioceras
Lagomeryx
Prolibytherium
Protoceratidae
Protoceras
Syndyoceras
Synthetoceras
Familia incierta:
Andrewsarchus
Brachyhyops
Hoplitomeryx