In Depth
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.
Further Reading
– 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 – 2009.