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 the same name. This specimen, discovered on private land in Harding County, South Dakota in 1981 by Michael Zimmerschied, and Dee Zimmerschied and on 4 October 1992 (Alan and Robert Detrich re-discovered Samson after it was originally found and deemed by paleontologists that several bones had washed in and there was nothing left). It was shortly after that when the Detrich brothers found the most complete and undistorted Tyrannosaurus rex skull ever discovered, which was prepared by the Carnegie Museum starting in May 2004. Samson measured , only slightly shorter than Sue. On July 7, 2013 Robert (Bob) Detrich a