Contact: Steve Koppes
University of Chicago
Caption: At only 9 feet in length, Raptorex already had the powerful jaws, puny arms, and quick legs of its much larger and more famous descendants.
Credit: Drawing by Todd Marshall
Usage Restrictions: News organizations may use this image in connection with reports describing the research of Paul Sereno and his associates.
Related news release: T. rex body plan debuted in Raptorex, but 100th the size