Which two fossils were used to support the theory of continental drift?

The fossils of the seed fern Glossopteris and the reptile Mesosaurus provide compelling evidence for the theory of continental drift. The discovery of Glossopteris, which was a plant that thrived in warm, temperate climates, across continents that are now separated by vast oceans, suggests that these landmasses were once connected. Likewise, Mesosaurus, a freshwater reptile, has been found in both South America and Africa, which are also separated by the Atlantic Ocean today. The presence of these identical fossils on different continents supports the idea that these continents were once part of a single landmass that later drifted apart. This distribution of fossils indicates not only a shared ecological environment in the past but also reinforces the concept of continental drift by demonstrating that species could not have crossed the ocean barriers that exist today.