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Reconstruction, left forefoot skeleton (third digit emphasized yellow) and longitudinal section of molars of selected prehistoric horses Skeletal evolution. The evolution of the horse, a mammal of the family Equidae, occurred over a geologic time scale of 50 million years, transforming the small, dog-sized, [1] forest-dwelling Eohippus into the ...
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Restoration. Mesohippus had longer legs than its predecessor Eohippus and stood about 60 cm (6 hands) tall.This equid is the first fully tridactyl horse in the evolutionary record, with the third digit being longer and larger than its second and fourth digits; Mesohippus had not developed a hoof at this point, rather it still had pads as seen in Hyracotherium and Orohippus. [4]
“In the past, you had many different lineages of horses,” said Pablo Librado, an evolutionary biologist at the Sp Scientists have traced the origin of the modern horse to a lineage that ...
Equidae (commonly known as the horse family) is the taxonomic family of horses and related animals, including the extant horses, asses, and zebras, and many other species known only from fossils. The family evolved around 50 million years ago from a small, multi-toed ungulate into larger, single-toed animals.
Evolution of cetaceans; Evolution of horses; Evolution of primates – Origin and diversification of primates through geologic time Evolution of humans – Evolutionary process leading up to the appearance of anatomically modern humans Evolution of human intelligence; Human evolutionary genetics – Study of differences between human genomes
The height of horses is measured at the highest point of the withers, where the neck meets the back. [23] This point is used because it is a stable point of the anatomy, unlike the head or neck, which move up and down in relation to the body of the horse.
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.