Guanlong is a small meat-eating theropod related to Tyrannosaurus. It was found in China during the Jurassic time period. Facts Guanlong was small for a tyrannosaur. It grew only 10 feet long, and less than 200 pounds. It was a similar shape to Velociraptor, but it was actually related to tyrannosaurids. It had feathers which kept it warm.