Tail spines: The most distinctive feature of Stegosaurus stenops was its tail

Aunque no se ha recuperado esqueleto postcraneal

Length 52 mm

and mammals such as South American ungulates and ground sloths

El Dilophosaurus tenía un cráneo distintivo con dos crestas óseas finas semicirculares a lo largo del cráneo

Elasmosaurus platyurus Anurognathus Tail spines: The most distinctiveElasmosaurus platyurus is a marine reptile from the Late Cretaceous that lived approximately 80 million years ago. This member of the plesiosaur family is famous for its extremely long neck, which makes up almost half of its total length, which is estimated to be around 10. 5 meters (35 feet), although it could reach 14 meters in length. Its neck is thought to have contained up to 72 vertebrae, giving it great flexibility for moving in the water.