Another animal that was sometimes classed as a parareptile, but is now thought to have been a separate animal close to the ancestry of the reptiles, is Mesosaurus. It was a freshwater swimming animal, and the presence of its fossils in both Brazil and South Africa is taken as an early proof of continental drift. It was a freshwater animal and could not have crossed the Atlantic Ocean, and so it must have existed at a time when South America and Africa were part of the same continent. realistic dinosaur costume
Features: For such an early reptile, Mesosaurus is very specialized Its flattened tail, webbed hind feet, and thickened ribs to counteract buoyancy, show it to have been an aquatic animal. Its eyes and nostrils are high on the skull, for easy breathing on the water surface. The teeth are many and fine, arranged like those of a comb. It seems likely that they were used, not for seizing prey, but for filtering shrimp-like invertebrates from the waters of the lakes and rivers in which it lived.