| A New Giant Compsognathid Dinosaur with Long Filamentous Integuments from Lower Cretaceous of Northeastern China |
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| 作者姓名： | JI Shu＇ an JI Qiang LU Junchang YUAN Chongxi |
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| 作者单位： | [1]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 [2]Key Laboratory of Stratigraphy and Paleontology,Chinese Academy of Geological Sciences, Beijing 100037 |
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| 基金项目： | We thank Mr. Sun Zhenyuan and Mr. Gao Yubo （Jinzhou Museum of Paleontology, JMP） for providing this beautiful specimen to us for study; Mr. Gao Chao （JMP） for skillfully preparing the specimen. This research was supported by the National Basic Research Program of China （973 Project, grant no. 2006CB701405）, the National Natural Science Foundation of China （grant no. 40272008）, and the China Geological Survey. |
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| 摘 要： | 1 Introduction Compsognathids are a small group of theropods commonly placed at the basal position within Coelurosauria (Sereno, 1999; Rauhut, 2003; Holtz and Osmólska, 2004; Norell and Xu, 2005). Recently new findings make the number of valid compsognathid genera increase rapidly. This group contains the relatively complete Compsoganthus (Ostrom, 1978; Bidar et al., 1972) and Juravenator (G?hlich and Chiappe, 2006) from the Upper Jurassic of West Europe, and Sinosauropteryx (Ji and J…
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| 关 键 词： | 白垩纪 恐龙 古动物 肱骨 鹰嘴 |
| 收稿时间： | 2006-12-18 |
| 修稿时间： | 1/4/2007 12:00:00 AM |
A New Giant Compsognathid Dinosaur with Long Filamentous Integuments from Lower Cretaceous of Northeastern China |
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| Authors: | JI Shu'an JI Qiang L Junchang YUAN Chongxi |
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| Institution: | JI Shu'an,JI Qiang,L(U) Junchang,YUAN Chongxi |
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| Abstract: | A new compsognathid dinosaur, Sinocalliopteryx gigas gen. et sp. nov., is erected based on a complete skeleton from the Early Cretaceous Yixian Formation of western Liaoning, northeastern China. It shares the features with Huaxiagnathus orientalis in having a manus as long as the humerus plus radius, very large and subequally long manual claws I and H, and reduced olecranon process on the ulna. But it differs from Huaxiagnathus orientalis in having the much large size, a very long maxillary process of premaxilla not extending the vertical level of the maxillary antorbital fossa, and the proportionally longer ulna and so on. Sinocalliopteryx gigas gen. et sp. nov. represents the largest species among the known compsognathid dinosaurs, suggesting the tendency of the body enlargement in compsognathids to some extent. The long filamentous integuments are attached to the whole body of this compsognathid, confirming that such integuments evolved firstly in the basal coelurosaurs. This new giant compsognathid was a fierce carnivorous theropod, as shown further by an incomplete dromaeosaurid leg inside its abdominal cavity. |
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| Keywords: | Compsognathidae SinocaUiopteryx gen nov giant skeleton filamentous integuments Yixian Formation Early Cretaceous western Liaoning |
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