Parahippus_leonensis

M_gunteri

M_primus

Astrohippus

Pliohippus

M_carrizoensis

M_stylodontus

M_intermontanus

Hippidion

Onohippidium

Equus

Dinohippus

Protohippus

Calippus

Merychippus_isonesus

M_sejunctus

M_coloradense

Pseudhipparion

Neohipparion

M_insignis

Hipparion

M_goorisi

Cormohipparion

Nannippus