AMNH5027

AMNH 5027 was discovered and excavated in 1908 by Barnum Brown in Montana, and described by Osborn in 1912 and 1916. At the time of its discovery, a cervical series (neck vertebrae) was not yet known to Tyrannosaurus, so this specimen it was the one that revealed the characteristic short and robust neck of the tyrannosaurs. Compared to later specimens (BMNH R7994 and FMNH PR2081, for example) the cervical series of AMNH 5027 is much more graceful, so that later discoveries made the distinction between tyrannosaurid and carnosaurus necks more obvious. This specimen also provided the first complete Tyrannosaurus rex skull. Altogether, Brown found five partial Tyrannosaurus skeletons. Its size was estimated to be about 11.8 meters in length.