Named By: Li et al. - 2010.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Theropoda, Coelurosauria, Tyrannosauroidea.
Species: X. baimoensis (type).
Size: Estimated about 4-4.5 meters long.
Known locations: China, Gansu Province.
Time period: Aptian to Albian of the Cretcaceous.
Fossil representation: Skull and partial postcranial remains.
Xiongguanlong is what is considered to be an intermediate tyrannosaur, larger than the earlier species, smaller than the larger ones like Gorgosaurus and Alioramus. Xiongguanlong has a long snout on what is a quite narrow skull for a tyrannosaurid.
- A longirostrine tyrannosauroid from the Early Cretaceous of China. - Proceedings of the Royal Society B: Biological Sciences 277 (1679): 183–190. - Daquing Li, Mark A. Norell, Ke-Qin Gao, Nathan D. Smith, Peter J. Makovicky - 2010.