Xiongguanlong
Live reconstruction
- Xinminpu Group, China ( Gansu )
Xiongguanlong was a basal Tyrannosauroide, which was described in 2009. The only way is Xiongguanlong baimoensis. The genus was named after the town of Jiayuguan, which is located nearby. Xiong Guan is their old name that stands for long dragon. The Style epithet baimoensis after a rock formation near. Xiongguanlong lived at the end of the Cretaceous period 125-100 million years ago.
The holotype with the catalog number FRDC -GS JB16 -2-1 consists of a complete, albeit deformed skull excluding the mandible, the vertebrae, with the exception of the cervical vertebrae, a partially preserved right iliac and right femur.
Features
Since the sutures of the holotype are almost completely closed, there must be an adult specimen. The weight of the live specimen is estimated to be 272 kg. The body height was about two meters. This Xiongguanlong was a medium-sized Tyrannosauroide.
Xiongguanlong had similar Alioramus, a low long skull and a long, narrow snout, which accounted for more than two-thirds the length of the skull. As with the late Cretaceous Tyrannosauroiden the skull is laterally widened behind the snout region, and about twice as wide as the muzzle.
The Zwischenkieferbein was short and as high as long. It had four teeth that were ungesägt in contrast to other Tyrannosauroidea as Dilong, Eotyrannus, Gorgosaurus and adult specimens of Tyrannosaurus. The upper jaw was long and low. In the better-preserved left maxilla, including 15 different bony alveoli.
System
Xiongguanlong is the sister taxon of Tyrannosauridae plus Appalachiosaurus.
Guanlong
Eotyrannus
Dilong
Xiongguanlong
Appalachiosaurus
Tyrannosauridae