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An Adult Specimen of Hongshanosaurus houi (Dinosauria: Psittacosauridae) from the Lower Cretaceous of Western Liaoning Province, China 总被引：1，自引：0，他引：1
YOU Hailu XU Xing Institute of Geology Chinese Academy of Geological Sciences Beijing Institute of Vertebrate Paleontology Paleoanthropology 《《地质学报》英文版》2005,79(2):168-173
A new specimen consisting of a complete skull and lower jaw was discovered from the Lujiatun bed of the Lower Cretaceous Yixian Formation in the Lujiatun site, Beipiao, western Liaoning Province. It represents an adult specimen of Hongshanosaurus houi. Comparative studies show that Hongshanosaurus is distinguishable from its sister taxon Psittacosaurus by having the preorbital portion about half of the basal skull length, and the elliptical external naris,orbit, and a lower temporal fenestra oriented caudodorsally. 相似文献
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YOUHailu ЛQiang LIJinalu LIYinxian 《《地质学报》英文版》2003,77(2):148-154
A new hadrosauroid dinosaur,Shuangmiaosaurus gilmorei gen.et sp.nov,is descuibed based on a complete left maxilla with articulated premaxilla and lacrimal fragments,and a complete left dentary from the mid-Cretaceous Sunjiawan Formation of Beipiao.Liaoning,northeastern China.Chadistic analysis shows that Shuangmiaosaurus is a basal hadrosauroid,and comprises the sister taxon to Hadrosauridae.In both Shuangmiaosqurus and Hadrosaurids.However,Shuangmiaosaurus does not possess such hadrosaurid synapomorphies as the diamond-shaped maxillary crowns with reduced primary ridges and reduced marginal denticles. 相似文献
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YOU Hailu TANG Feng LUO Zhexi Institute of Geology Chinese Academy of Geological Sciences Baiwanzhuang Ro Beijing Institute of Vertebrate Paleontology Paleoanthropology Chinese Academy of Sciences Xiwaidajie Beijing Section of Vertebrate Paleontology Carnegie Museum of Natural History Pittsburgh PA USA 《《地质学报》英文版》2003,77(4):424-429
A new dinosaur of Early Cretaceous age was recently discovered from the Mazongshan area of northwestern Gansu Province, China. The new dinosaur represents a new genus and species of Sauropoda, and is among the most basal members of Titanosauria. Its finding also suggests that titanosaurs might have originated in Asia no later than the Early Cretaceous. 相似文献
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A new basal hadrosauriform dinosaur, Xuwulong yueluni gen. et sp. nov., is reported based on an articulated specimen including a complete cranium, almost complete axial skeleton, and complete left pelvic girdle. The specimen is recovered from the Early Cretaceous Yujingzi Basin in the Jiuquan area, Gansu Province of northwestern China. Xuwulong is among the most basal members of hadrosauriform dinosaurs, and distinguished by its unique lower jaw in having a V-shaped rostral end of the dentary in lateral view and a mandibular articular surface which levels with mid-height of the dentary ramus, as well as an enlarged and downturned prepubic process. Including Xuwulong, three basal hadrosauriforms have been discovered from the Early Cretaceous Xinminpu Group in the Mazongshan area, making it an important area to study the origin and early evolution of duck-billed dinosaurs. 相似文献
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An Early Cretaceous Avialian Bird, Shenzhouraptor sinensis from Western Liaoning, China 总被引：1，自引：1，他引：1
Ji Qiang Ji Shu''an You Hailu Zhang Jianping Zhang Hongbin Zhang Nanjun Yuan Chongxi Ji XinxinDepartment of Earth Sciences Nanjing University Nanjing Jiangsu Institute of Geology Chinese Academy of Geological Sciences Beijing School of Earth Space Sciences Peking University Beijing China University of Geosciences Beijing China Dinosaur Park of Changzhou Changzhou Jiangsu 《《地质学报》英文版》2003,77(1):21-27
This paper describes an avialian bird from the Early Cretaceous Jiufotang Formation in Yixian county, western Liaoning, China, which is named as Shenzhouraptor sinensis by Ji et al. on July 15, 2002. Shenzhouraptor sinensis is characterized by no teeth in its mouth, the forelimbs longer than the hindlimbs, a long tail with more than 23 caudal vertebrae, U-shaped wishbone, and remiges longer than the total length of ulna and manus. It is certain that the new avialian bird is really capable of powerful flight, representing a missing link between theropod dinosaurs and birds. 相似文献