Ornitholestes - "Bird Robber" Ornitholestes, which means "bird robber", was a small bipedal carnivore. An almost complete skeleton of him is known to have been found in Wyoming, USA. It was about 2 m long, with the tail alone accounting for half of its body length. Ornitholestes had a long skull, neck and tail, with […]

“"Hollow Tail"” Coelurus is a poorly known genus. From most of the skeleton of a single individual, the appearance of Coelurus can be reconstructed quite well. Numerous vertebrae, partial pelvic and shoulder girdles, and most of the arms and legs are present. So far only one species is recognized as valid: the type species, C. […]

"Different Lizard" Allosaurus means different looking lizard. Its discoverer O.C. Marsh gave it this name because the vertebral bones looked different from those he had known before. Allosaurus was a carnivore that moved on two powerful hind legs. Its arms were short and strong and ended in three powerful claws. The front arms were not […]