Pterosaur
This early group did well from the Upper Triassic to the Lower Cretaceous. When we first see them in the fossil record they have split into three families, so biologists know their early evolution is not yet revealed.p240, 246 These three families are represented by the three genera Rhamphorhynchus, Dimorphodon and Eudimorphodon. At least one more family appears at the start of the Jurassic, the Anurognathidae.