Pseudhipparion

Pseudhipparion is an extinct genus of three-toed horse endemic to North America during the Miocene.^{[1][2][3][4][5]} They were herding animals whose diet consisted of C3 plants.^{[6][7][8][9][10][11][12]} Fossils found in Georgia, Florida, Oregon, Montana, Kansas, Texas, Nebraska, and South Dakota indicate that it was a lightweight horse, weighing up to 90 pounds (40 kilograms).^{[13][14][15][16][17][18][19][20][21]} In 2005, fossils were unearthed in Oklahoma.^[22] Seven species of Pseudhipparion are known from the fossil record which were very small, following the trend of Bergmann's rule.^[23]

Pseudhipparion Temporal range: Barstovian–Hemphillian ~15.97–5.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Pseudhipparion retrusum skull, Museo di Paleontologia di Firenze
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Perissodactyla
Family:	Equidae
Subfamily:	Equinae
Tribe:	†Hipparionini
Genus:	†Pseudhipparion Ameghino, 1904
Species
P. curtivallum (Quinn, 1955) P. gratum (Leidy, 1869) P. hessei Webb and Hulbert, Jr., 1986 P. retrusum (Cope, 1889) (type) P. simpsoni Webb and Hulbert, Jr., 1986 P. skinneri Webb and Hulbert, Jr., 1986