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.

Equidae is a family of odd-toed ungulate mammals of horses and horse-like animals. It is sometimes known as the horse family . All extant equids are in the genus Equus and include the three basic groups of horses, asses, and zebras .

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.

Equine, one of the mammal family of Equidae (order Perissodactyla) that includes the modern horses, zebras, and asses, as well as more than 60 species known only from fossils. All six modern members of the family are placed in the genus Equus.

4 天之前 · The history of the horse family, Equidae, began during the Eocene Epoch, which lasted from about 56 million to 33.9 million years ago. During the early Eocene there appeared the first ancestral horse, a hoofed, browsing mammal designated correctly as Hyracotherium but more commonly called Eohippus, the “dawn horse.”

Equids are polyg­y­nous herd an­i­mals that gen­er­ally live in ex­tended fam­ily groups oc­cu­py­ing large ter­ri­to­ries in open coun­try (grass­lands, semi-arid areas, deserts, and moun­tains). Com­mu­ni­ca­tion of moods and other in­for­ma­tion takes place with changes in ear, mouth, and tail po­si­tions.

Equidae: the true horses of the family, Equidae first appeared in North America at the beginning of the Eocene, about 55.5 MYA. Only a few minor details of the skull and teeth unite horses into a single family; the features that we normally think of as equine, such as high-crowned hypsodont teeth, large size, long limbs, and single-toed feet ...

Equidae is a family of odd-toed ungulate that are only one surviving genus: Equus. Horses, donkeys and zebras belong in this genus. Animals of the Equus genus can have hybrid offspring, but they are usually sterile. They can have many different colours. An adult female equidae is …

The equids are the most numerous and widely-distributed group of modern perissodactyls, although only one genus and seven species survive to the present day (an eighth, Equus quagga, was lost to extinction in 1883).

Equidae (sometimes known as the horse family) is the taxonomic family of horses and related animals, including the extant horses, donkeys, and zebras, and many other species known only from fossils. All extant species are in the genus Equus, which originated in North America.