Extinct Reptiles And Dinosaurs

This group gathers Reptiles subcategory members that are extinct, known only from fossils, most of them non-avian dinosaurs and their close paravian relatives rather than living reptile lineages, mis-filed into a living-species subcategory by an earlier mint pass. It spans large predatory theropods such as Australovenator, Cryolophosaurus and Tyrannotitan, smaller feathered paravians such as Anchiornis huxleyi, Tianyuraptor and the sickle-clawed Balaur bondoc, the horned protoceratopsid Bagaceratops, the giant sauropod Nigersaurus, recognizable for an unusually wide, straight-edged muzzle adapted for close-cropped grazing, and Tawa hallae, one of the earliest known theropod dinosaurs, whose discovery helped clarify the early evolutionary branching of the dinosaur family tree. Every member of this group is known exclusively through fossil remains, dated from the Triassic through the Cretaceous periods, and none has any living population; the group exists so these clearly non-extant subjects are not counted or displayed alongside the living reptile species that make up the rest of the Reptiles subcategory.