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
Tyrannosaurus general public. Modern representations in museums, art, and film show "Tyrannosaurus rex" with its body approximately parallel to the ground with the tail extended behind the body to balance the head. When "Tyrannosaurus rex" was first discovered, the humerus was the only element of the forelimb known. For the initial mounted skeleton as seen by the public in 1915, Osborn substituted longer, three-fingered forelimbs like those of "Allosaurus". A year earlier, Lawrence Lambe described the short, two-fingered forelimbs of the closely related "Gorgosaurus". This strongly suggested that "Tyrannosaurus rex" had similar forelimbs, but this hypothesis was not confirmed until the