dolphins, and porpoises are also classified as artiodactyls, although they do not have hooves.

Most terrestrial ungulates use the hoofed tips of their toes to support their body weight while standing or moving. Two other orders of ungulates, Notoungulata and Litopterna, both native to South America, became extinct at the end of the Pleistocene, around 12,000 years ago.

The term means, roughly,

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