Astrohippus, Calippus, Equus (synonymized with Allozebra, Asinus, Onager, Plesippus, Neohippus, Equus semiplicatus, Equus tau), Hippidion, Onohippidium, Pliohippus, Protohippus (syn. Eoequus)
Astrohippus, Calippus, Dinohippus, Equus (synonymized with Allozebra, Asinus, Onager, Plesippus, Neohippus, Equus semiplicatus, Equus tau), Hippidion, Onohippidium, Pliohippus, Protohippus (synonymized with Eoequus).