Is wegener inferred that the ancient plants mesosaurus and lystrosaurus once Lived on a single landmass that since split apart?

Yes, Alfred Wegener inferred that the ancient plants Mesosaurus and Lystrosaurus once lived on a single landmass, which he referred to as Pangaea. Their fossil remains have been found on separate continents, specifically South America and Africa, suggesting that these continents were once connected. This evidence supported his theory of continental drift, indicating that the continents have since split apart over millions of years.