Yes, the case of the Mesosaurus does support Wegener's theory of continental drift because Mesosaurus however were-- as stated very well, A non-pelagic freshwater species from the Permian limited to a narrow range in the south east tip of South America and South Africa. In my opinion we cannot totally rule out "Accidental" ocean going land and freshwater as examples do exist (e.g Central and South American land tortoises to and from Galapagos) but the gravity of the drift theory favors conjoint land else narrow very narrow seaways for which rafting or limited range free swimming could be a mechanism of spreading breeding populations. My point being we can not exclude the possibility of animals being able to cross minor bodies of water because we have more modern examples for which swimming or rafting on debris were plausible. Egrets are a flying example of how species may be distributed across large bodies of water and so aren't perfect evidence. Common egrets were blown over from Africa to South America late in the 1800s in a massive storm system. Through replication and migrations they have reached the Piedmont of the Carolinas , central Alabama-Georgia and western Tennessee.
yes it does.
mesosaurus
The fossil of Mesosaurus, a small aquatic reptile, was found in both South America and Africa. Its presence on different continents was used as evidence to support the theory of continental drift, as it suggested that the continents were once connected and later drifted apart.
Fossils support his hypothesis.
The fossil that was found on different continents and used to support the theory of continental drift is the Mesosaurus. This extinct freshwater reptile had limited swimming abilities, making it unlikely that it could have crossed vast oceans. Its distribution on both sides of the Atlantic Ocean provided evidence of land connections that later formed the basis for the theory of continental drift.
There was no evidence to prove it
Alfred Wegeners 1912 theory of Plate tectonics and continental drift.
The case of Mesosaurus does not by itself prove the theory of continental drift, but it provides significant evidence supporting it. Mesosaurus was a freshwater reptile found in both South America and Africa, suggesting these continents were once joined. The existence of similar fossils on widely separated landmasses is difficult to explain without considering continental movement. However, additional evidence from geology, paleomagnetism, and other fossil types further supports the theory.
It was not excepted because they didn't believe him at all until it was proven!
plate tectonics
The case of Mesosaurus does support the theory of continental drift, particularly in the context of plate tectonics. This freshwater reptile's fossils were found in both South America and Africa, which are now separated by the Atlantic Ocean. The presence of such a species in these two distant locations suggests that the continents were once joined, allowing Mesosaurus to inhabit both regions. Thus, it provides evidence against the idea that these continents have always been in their current positions.
The case of Mesosaurus does not, by itself, prove the theory of continental drift, as it requires additional evidence to establish a comprehensive explanation. While Mesosaurus fossils found in both South America and Africa suggest past connectivity between these continents, they alone cannot confirm the theory without supporting geological and paleontological data. The alignment of other fossil records, geological formations, and the distribution of similar species across continents collectively strengthen the argument for continental drift. Thus, while Mesosaurus contributes to the evidence, it is not definitive proof on its own.