(Acritohippus_stylodontus,(Pliohippus_pernix,(Dinohippus_leardi,((Dinohippus_interpolatus,Dinohippus_leidyanus,(Astrohippus_stocki,(Dinohippus_mexicanus,((Equus_stenonis,((Equus_mexicanus,(Equus_hemionus,(Equus_conversidens,Equus_quagga,Haringtonhippus_francisci))),(Equus_ferus,(Equus_neogeus,Equus_occidentalis)))),(Equus_idahoensis,Equus_simplicidens))))),(Boreohippidion_galushai,(Hippidion_principale,Hippidion_saldiasi))))));