A new, large tyrannosaurine theropod from the Upper Cretaceous of China |
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Authors: | David WE Hone Kebai WangCorwin Sullivan Xijin ZhaoShuqing Chen Dunjin LiShuan Ji Qiang JiXing Xu |
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Institution: | a Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Palaeoanthropology, Chinese Academy of Sciences, PO Box 643, Beijing 100044, People’s Republic of China b Zhucheng Dinosaur Museum, Bureau of Tourism, Zhucheng 262200, People’s Republic of China c Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, People’s Republic of China |
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Abstract: | Tyrannosaurids are primarily gigantic, predatory theropod dinosaurs of the Cretaceous. Here we report a new member of the tyrannosaurid clade Tyrannosaurinae from the Upper Cretaceous Wangshi Group of Zhucheng, Shandong Province, China, based on a maxilla and associated dentary. The discovery of this animal, here named Zhuchengtyrannus magnus gen. et sp. nov., adds to the known diversity of tyrannosaurids in Asia. Z. magnus can be identified by a horizontal shelf on the lateral surface of the base of the ascending process, and a rounded notch in the anterior margin of the maxillary fenestra. Several additional features contribute to a unique combination of character states that serves to further distinguish Z. magnus from other taxa. Comparisons with other tyrannosaurids suggest that Zhuchengtyrannus was a very large theropod, comparable in size to both Tarbosaurus and Tyrannosaurus. |
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Keywords: | Dinosaur Saurischian Tyrannosaurid Skull China Cretaceous |
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