Epihippus

Epihippus is an extinct genus of the modern horse family Equidae that lived in the Eocene, from 46 to 38 million years ago.

Epihippus Temporal range: 46.2–38.0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Early Uintan to Duchesnean[1]
Illustration of Epihippus gracilis skull and teeth
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Perissodactyla
Family:	Equidae
Genus:	†Epihippus Marsh, 1877
Synonyms
Duchesnehippus

Epihippus is believed to have evolved from Orohippus, which continued the evolutionary trend of increasingly efficient grinding teeth. Epihippus had five grinding, low-crowned cheek teeth with well-formed crests. A late species of Epihippus, sometimes referred to as Duchesnehippus intermedius, had teeth similar to Oligocene equids, although slightly less developed. Whether Duchesnehippus was a subgenus of Epihippus or a distinct genus is disputed. This is an early species of a horse.

There are three species:[1]

• Epihippus gracilis
• Epihippus intermedius
• Epihippus uintensis