Parahippus_leonensis
M_gunteri
M_primus
M_intermontanus
M_stylodontus
M_carrizoensis
Pliohippus
Astrohippus
M_sejunctus
Merychippus_isonesus
Calippus
Protohippus
Dinohippus
Equus
Onohippidium
Hippidion
M_coloradense
Neohipparion
Pseudhipparion
M_insignis
Hipparion
M_goorisi
Nannippus
Cormohipparion