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Equus scotti (translated from Latin as Scott's horse, [1] named after vertebrate paleontologist William Berryman Scott) is an extinct species of horse native to Pleistocene North America. [ 2 ] Evolution
Equus simplicidens, sometimes known as the Hagerman horse or the American zebra is an extinct species in the horse family native to North America during the Pliocene and Early Pleistocene. [ 1 ] [ 2 ] It is one of the oldest and most primitive members of the genus Equus .
Extinct equids restored to scale. Left to right: Mesohippus, Neohipparion, Eohippus, Equus scotti and Hypohippus. Wild horses have been known since prehistory from central Asia to Europe, with domestic horses and other equids being distributed more widely in the Old World, but no horses or equids of any type were found in the New World when European explorers reached the Americas.
Dinohippus was the most common horse in North America and like Equus, it did not have a dished face (i.e. the head profile did not have a concave section).It has a distinctive passive "stay apparatus" formed from bones and tendons to help it conserve energy while standing for long periods.
Caballine true horses (Equus cf. ferus) from the Late Pleistocene of North America have historically been assigned to many different species, including Equus fraternus, Equus scotti and Equus lambei, but the taxonomy of these horses is unclear, and many of these species may be synonymous with each other, perhaps only representing a single species.
Equus (/ ˈ ɛ k w ə s, ˈ iː k w ə s /) [3] is a genus of mammals in the family Equidae, which includes horses, asses, and zebras. Within the Equidae, Equus is the only recognized extant genus, comprising seven living species.
Remains attributed to the species display a considerable range of morphological variability. [9] The species had a small body size, with adult individuals estimated to have a body mass of around 300–365 kilograms (661–805 lb), [3] with the mummy of an 8 year old adult male horse (the Selerikan mummy) having a height of 1.35 metres (4 ft 5 in) at the withers.
The last specimen died in 1909 whilst in captivity in an estate in Poltava Governorate, Russian Empire. Przewalski's horse (Equus ferus przewalskii), incorrectly listed as Equus caballus przewalskii in MSW 3; also known as the Mongolian wild horse or takhi, it is native to Central Asia and the Gobi Desert.