Coelurus agilis

Coelurus is a well known,small, bipedal carnivore from the jurassic and belong to the family coeluridae, which consists of coelrus itself and the larger Tanycolagreus. Coelurus is now considered to be ancestral to the later tyrannosaurs and therefore belongs to the superfamily of tyrannosauroidea, just like tanycolagreus does. Coelurus was a very gracile predator, barely 2 and a half metres long, it had slender ,long legs, ideal for running, and a long tail that was used as balance. Its head isnt known, only the lower jaw is partially known from this animal. This is the replacement pic in the tyrannpsaur project for this:  fav.me/d55oz68
Coelurus is probably THE classic small theropod, 3 fingers, 2 legs, a long slender body and the typical theropod like feet.