Amphibian rhinoceros is a short-lived Eocene and Oligocene species, shaped like hippopotamus, with about 10 genera, probably amphibians, with a large trunk and short limbs. The canine teeth of the other two families are shorter or have disappeared, while the canine teeth of the amphibian rhinoceros family are very large, curved, and continue to grow.
Amphibian rhinoceros family replaced the habitat of aquatic panodonts such as crested toothed beasts, and was later replaced by aquatic species such as the rhinoceros family, such as the far-horned rhinoceros.
Name: Posterior amphibian rhinoceros
Age: Late Eocene to Early Miocene
Locations: North America (Nebraska and South Dakota, USA) and Asia (Mongolia)
Size: Length 4 meters
Post-amphibian rhinoceros and its close relatives were found in rocks made of river sand and gravel, suggesting that these creatures were naturally predominantly aquatic. The posterior amphibian rhino resembles a hippopotamus in appearance, with a flattened head, a short neck, a huge barrel-shaped torso, and short legs. The front legs have four toes, which are prominent among rhinos.
A protrusion in the middle of the skull may be used to attach the jaw muscles to cope with rough woody food.
Hippo-shaped rales may be used to find food in the mud at the bottom of the river. It may also have lips that can be grasped.
Another aquatic adaptation is the eyes. Its eyes are high above the skull, allowing it to look around when underwater.