At the dawn of the Triassic and onwards to the early Cretaceous all the major continents were part of Pangaea. So assuming we arn't relying on just a few fossil

At the dawn of the Triassic and onwards to the early Cretaceous all the major continents were part of Pangaea. So assuming we arn't relying on just a few fossil beds to paint the picture, its virtually certain we are seeing the large continent species.