See text Amynodontidae ("defensive tooth")[4] is a family of extinct perissodactyls related to true rhinoceroses.

They are commonly portrayed as semiaquatic hippo-like rhinos[5][6] but this description only fits members of the Metamynodontini; other groups of amynodonts like the cadurcodontines had more typical ungulate proportions and convergently evolved a tapir-like proboscis.

The Greek name of the family describes their tusks, derived from enlarged canine teeth.

Odd-toed ungulates are herbivores, so these tusks would have been used either to deter or defend against predators (as suggested by the name) or perhaps in fights among males.

[7] Their fossils have been found in North America, and Eurasia ranging in age from the Middle Eocene to the Early Oligocene, with a single genus (Cadurcotherium) surviving into the Late Oligocene in South Asia (Pakistan).