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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 ...
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 more than 50 million years ago, in the Eocene epoch, from a small, multi-toed ungulate into larger, single-toed animals.
History of the horse in Britain; History of the horse in the Indian subcontinent; Horse culture in Mongolia; Horse name; Horse symbolism; Horses in Brittany; Horses in Cameroon; Horses in Cuba; Horses in East Asian warfare; Horses in Jamaica; Horses in Slovenia; Horses in Sudan; Horses in the Napoleonic Wars; Horses in the United States; Horses ...
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.
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.
Equinae is a subfamily of the family Equidae, known from the Hemingfordian stage of the Early Miocene (16 million years ago) onwards. [1] [2] They originated in North America, before dispersing to every continent except Australia and Antarctica.
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A study of four mammalian genera: Hyopsodus, Pelycodus, Haplomylus (three from the Eocene), and Plesiadapis (from the Paleocene) found that—through a large number of stratigraphic layers and specimen sampling—each group exhibited, "gradual phyletic evolution, overall size increase, iterative evolution of small species, and character ...