Eohippus

Eohippus is small fossil proto-horse. It is an extinct genus of small equid ungulates.^[1] The only species is E. angustidens, which was long considered a species of Hyracotherium. Its remains have been found in North America and date to the early Eocene (48–56 million years ago).^[2]

Eohippus Temporal range: early Eocene
National Museum of Natural History, Washington, D.C.
Scientific classification
Kingdom:	Animalia
Class:	Mammalia
Order:	Perissodactyla
Family:	Equidae
Genus:	†Eohippus (Marsh, 1876) Restoration by Heinrich Harder

Much of the evolution of the horse took place in North America. That is where horses originated, but became extinct there about 10,000 years ago.^[3]