Raptorex Raptorex Raptorex is a dubious genus of tyrannosaurid dinosaur. Its fossil remains consist of a single juvenile specimen probably uncovered in Mongolia, or possibly northeastern China. The type species is "R. kriegsteini", described in 2009 by Sereno and colleagues. The genus name is derived from Latin ', "robber", and ', "king". The specific name honours Roman Kriegstein, a survivor of the Holocaust, whose son Henry Kriegstein donated the specimen to the University of Chicago for scientific study. While initially considered to have come from the Yixian Formation of China, dated to approximately 125 million years ago during the early Cretaceous
Specimens of Tyrannosaurus by heavy loads or pressure (Carpenter and Lipkin, 2005). Casts of Peck's Rex have been featured at several museums including the Maryland Science Center, the Fort Peck Interpretive Center and Museum (beside a lifesized model), and the Carnegie Museum of Natural History as part of the exhibit: "Dinosaurs in Their Time" where it is mounted in a "face off" position against the holotype "Tyrannosaurus" skeleton (CM 9380). Cast pieces and skeletons of Peck's rex (like forelimbs, teeth, and parts of the jaws and feet) are also for sale. Peck's Rex real fossilized bones are exhibited at The Museum of the