Hipparion

Hipparion (Greek, 'pony') is an extinct genus of horse that lived in North America, Asia, Europe, and Africa during the Miocene through Pleistocene ~23 Mya—781,000 years ago. It lived in non-forested, grassy plains, shortgrass prairie or steppes. Hipparion resembled the modern horse, but still had two vestigial outer toes (in addition to its hoof) which did not touch the ground. Hipparion was about 1.4 metres (4.6 ft) tall at the shoulder.