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Xiongguanlong
Fossil range: Early Cretaceous (AptianAlbian)
Xiongguanlong 01
Xiongguanlong
Scientific classification

Class

Reptilia

Superorder

Dinosauria

Order

Saurischia

Suborder

Theropoda

Infraorder

Coelurosauria

Superfamily

Tyrannosauroidea

Genus

Xiongguanlong
Li D. et al., 2009

Species


Xiongguanlong (holotype:FRDC-GS JB16-2-1) is a genus of tyrannosauroid dinosaur that lived in the Early Cretaceous of what is now China. Fossils, which included a complete skull without lower jaws, complete presacral vertebral series, partial right ilium, were uncovered in the Xinminpu Group, Yujingzi Basin, Gansu, western China. The type species is X. baimoensis, described in 2009 by a group of researchers from China and the United States. The genus name refers to the city of Jiayuguan, a city in northwestern China. The specific name is derived from bai mo, "white ghost", after the "white ghost castle", a rock formation near the fossil site. The fossil is believed to be from the Aptian to Albian stages (between 100 to 125 million years ago).[1]

Xiongguanlong split off from the main branch of the Tyrannosauroidea just below Appalachiosaurus, being the sister taxon of a clade consisting of Appalachiosaurus and the Tyrannosauridae. It was intermediate in size between earlier tyrannosauroids from the Barremian and later tyrannosaurids from the Late Cretaceous, such as Tyrannosaurus, and had a long muzzle resembling that of Alioramus.[1]

DescriptionEdit

See alsoEdit

ReferencesEdit

  1. ^ a b Daqing Li, Mark A. Norell, Ke-Qin Gao, Nathan D. Smith, and Peter J. Makovicky. 2009. A longirostrine tyrannosauroid from the Early Cretaceous of China. Proceedings of the Royal Society B: Biological Sciences, Abstract


External linksEdit

Tyrannoskull

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