What does mesosaurus fossils tell about the positioning of the continents?

Mesosaurus fossils, which are found in both South America and Africa, provide strong evidence for the theory of continental drift. Since this freshwater reptile could not have crossed the vast Atlantic Ocean, its presence on both continents suggests they were once connected. This alignment supports the idea that the continents were joined together in the supercontinent Pangaea before drifting apart. Thus, mesosaurus fossils help illustrate the historical configuration of Earth's landmasses.