Raptorex belongs to the family of tyrannosaurid dinosaur that has been found existed in the late cretaceous period, over 125 million years ago. The fossil remains of the species were first discovered in the Woodlands of central Asia- the Yixian Formation of China. This carnivore species comes under the classification of Chordata, Dinosauria, Theropoda, Tyrannosauridae.
The type species was first described by Sereno and colleagues in 2009. From the fossil skeleton it has been observed that the dinosaur was about 10 feet long weighing approximately to 150 pounds. Only the juvenile specimen was recovered till date. Researches on juvenile Raptorex revealed that the species had some distinguishing Characteristics such Small sized skeletal structure; stunted hands and arms. It had strong legs with adaptations for running, and tiny, two-fingered forelimbs.