The first Stegosaurus stenops fossil was discovered in 1877 by paleontologist Othniel Charles Marsh

The cranial endoskeleton shows a combination of primitive and derived features

it had no front teeth

it had a crescent-shaped tail

with powerful hind legs that gave it speed and agility

Ursus spelaeus Escala:1:35 The first Stegosaurus stenops fossilUrsus spelaeus, commonly known as the cave bear, was a large ursid from the European Pleistocene and one of the most emblematic species of Quaternary megafauna. It inhabited extensive regions of Europe during the Middle and Late Pleistocene, particularly temperate, cold and mountainous environments associated with open woodlands, grasslands, valleys and karst systems. Its specific name, spelaeus, refers directly to caves, as its remains are frequently