Generic nomen for a modern horselike mammal, a Pleistocene, one-toed browser with its immediate ancestral forms
found in Asia. Equus
dispersed into Africa c.
, and thus makes an excellent index fossil
in Africa, categorically separating sites
dating 2 mya
, in which modern horse bones
are present. Brought to the New World
in historical times as a domesticated animal
, many of which immediately became feral
and repopulated the Great Plains of North America.