👉 Ophiomorus is a genus of extinct mammals that lived in the Mesozoic era, approximately 65 million years ago to about 48 million years ago. This group was characterized by a wide range of size and body proportions, including short limbs, elongated heads, and large, robust bodies with massive teeth. Ophiomorus is thought to have been an aquatic mammal that lived in shallow water, likely near the ocean floor.