Plesippus is a genus of extinct horse from the Pleistocene of North America. Although commonly seen as a subgenus of Equus recent cladistic analysis considers it a distinct genus.

Equus simplicidens, also known as the Hagerman horse and American zebra, is an extinct species of equine native to North America during the Pliocene and Early Pleistocene. [1] . It is …

The genus Equus, which includes all extant equines, is believed to have evolved from Dinohippus, via the intermediate form Plesippus. One of the oldest species is Equus simplicidens , …

In this contribution, we assess the validity of the genera Plesippus, Allohippus and Equus by cladistic analysis combined with morphological and morphometrical comparison of cranial …

This rich fossil bed has yielded over 130 complete horse skeletons, was discovered in the 1920s near Hagerman and is said to be the best known Pleistocene-epoch fossil site in the world. …

James W. Gidley, the Smithsonian paleontologist, who led the initial excavations at Hagerman in 1929, felt that the horse being uncovered was different enough in its skeleton that it …

A seeker of vertebrate paleontological adventure in California's Coso Range explores badlands topography carved in the appropriately named Pliocene Coso Formation, which here yields …

terize Equus (Plesippus). In the upper dentition these features include: 1) the pli prefossette is oval and directed toward the post-fossette; 2) the fossettes are generally "shield-shaped"; 3) …

Equus simplicidens is considered one of the earliest known members of the genus Equus, which includes the modern horse and all other equids. Originally described as Plesippus …

Plesippus shoshonensis was named by Gidley (1930) [also, but incorrectly said to be 1921]. Its type specimen is USNM 11986, a partial skeleton, and it is a 3D body fossil. Its type locality is …