Name: Sinotyrannus ‭(‬Chinese tyrant‭)‬.
Phonetic: Sigh-noe-tie-ran-nus.
Named By: Q. Ji, S. A. Ji & L.-J.Zhang - 2009.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Saurischia,‭ ‬Theropoda,‭ ‬Proceratosauridae.
Species: S.‭ ‬kazuoensis‭ (‬type‭)‬.
Diet: Carnivore.
Size: Estimated at‭ about ‬9 to 10‭ ‬meters long.
Known locations: China,‭ ‬Liaoning Province‭ ‬-‭ ‬Jiufotang Formation.
Time period: Aptian of the Cretaceous.
Fossil representation: Very incomplete remains of the skull,‭ ‬dentary‭ (‬lower jaw‭)‬,‭ ‬a few vertebrae,‭ ‬hip and finger metarsals.

       Although Sinotyrannus has been described from very incomplete material,‭ ‬the palaeontologists who described this dinosaur have managed to conclude that it is a close relative of the primitive tyrannosaurs.‭ ‬Additionally they have also compared the remains to similar dinosaurs and come up with a rough length estimate of up to ten meters long for the living dinosaur.‭ ‬This suggests that Sinotyrannus was the largest predatory dinosaur in the Jehol Biota,‭ ‬the ecosystem of Liaoning Province during the Aptian stages of the Cretaceous.‭ ‬Here there were few rivals to Sinotyrannus,‭ ‬but the large feathered tyrannosaur Yutyrannus from the nearby Yixian Formation was almost as‭ ‬big as Sinotyrannus.

Further reading
- First large tyrannosauroid theropod from the Early Cretaceous Jehol Biota in northeastern China. - Geological Bulletin of China 28 (10): 1369–1374. - Q. Ji, S. A. Ji & L.-J.Zhang - 2009.


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