 Metamynodon

Metamynodon is an extinct genus of amynodont rhino that lived in North America (White River Fauna) and Asia during the Eocene early Oligocene, although the questionable inclusion of "M. mckinneyi" could extend their range to the Middle Eocene.The various species were large, displaying a suit of semiaquatic adaptations similar to those of the modern hippopotamus despite their closer affinities with rhinoceroses.