How did mesosaurus and lystrosaurus provide evidence of Pangaea's existence?

Mesosaurus and Lystrosaurus provided evidence for the existence of Pangaea through their fossil distributions. Mesosaurus, a freshwater reptile, was found in both South America and Africa, suggesting these continents were once connected, as it could not have traversed the vast ocean separating them. Similarly, Lystrosaurus fossils were discovered in Antarctica, Africa, and India, indicating that these landmasses were once part of a larger supercontinent. The presence of these identical species across distant continents supports the theory of continental drift and the existence of Pangaea.