Rhinocerotoid
superfamily of mammals (consisting of three family groups of odd-toed ungulates, two of which, the Amynodontidae and Hyracodontidae, are extinct)
Rhinocerotoidea is a superfamily consisting of four families of odd-toed ungulates, three of which, the Amynodontidae, Hyracodontidae, and Paraceratheriidae, are extinct.
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The only extant family is the Rhinocerotidae (true rhinoceroses), which survives as five living species.
Extinct non-rhinocerotid members of the group are sometimes considered rhinoceroses in a broad sense.
The family Paraceratheriidae contains the largest land mammals known to have ever existed.