Children (57 direct children, 101 direct and indirect children):
Equus ferus
(tree size 4)
Tarpan
Zebra
Zebras
Mule
Equus asinus × equus caballus
Onager
(tree size 7)
Khur
Equus africanus
(tree size 4)
Ass
Hinny
Equus caballus × equus asinus
Equus grevyi
(tree size 1)
Grevy’s zebra
Kiang
(tree size 4)
Equus kiang
Mountain zebra
(tree size 3)
Cape mountain zebra
Equus quagga
(tree size 9)
Burchell’s zebra
Equus simplicidens
Hagerman horse
Equus scotti
European ass
Equus hydruntinus
Haringtonhippus
Equus lambei
Equus sivalensis
Equus onager
Persian onager
Asinus
Zorse
Equus conversidens
Equus namadicus
Equus occidentalis
Western horse
Amerhippus
Subgenus of the genus equus
Equus andium
Equus insulatus
Equus lasallei
Equus neogeus
Equus pantanensis
Equus santaeelenae
Equus giganteus
Equus caballus
(tree size 6)
Horse
Equus eisenmannae
Equus stenonis
Equus yunnanensis
Yunnan horse
Equus burchellii
(tree size 6)
Equus asinus
Donkey (as a domesticated species)
Equus alaskae
Equus crenidens
Equus ovodovi
Equus semiplicatus
Equus fraternus
Equus fossilis
Equus przewalskii
Equus capensis
Dolichohippus
Equus curvidens
Equus domestic
Equus hollisi
Equus oldowayensis
Equus penrecei
Equus sp.
Equus suessenbornensis
Equus niobrarensis
Equus sanmeniensis
Equus dalianensis
Equus mauritanicus
Equus altidens