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Xuanhuaceratops
''Xuanhuaceratops'' is a genus of dinosaur from the Late Jurassic Period (dated to 167.7–161.2 million years ago).〔Holtz, Thomas R. Jr. (2011) ''Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages'', (Winter 2010 Appendix. )〕 A member of the family Chaoyangsauridae, it was one of the earliest ceratopsians.〔Weishampel ''et al.'' (2004) "Dinosaur Distribution." In: Weishampel, D.B., Dodson, P., & Osmolska, H. (Eds.). ''The Dinosauria'' (2nd Edition). Berkeley: University of California Press. Pp. 517–606 (Full text. )〕〔Xu X., Forster, C.A., Clark, J.M., & Mo J. (2006). "A basal ceratopsian with transitional features from the Late Jurassic of northwestern China." ''Proceedings of the Royal Society B: Biological Sciences''. .〕〔Zhao, X., Cheng, Z., Xu., X., and Makovicky, P. J. 2006. "A new ceratopsian from the Upper Jurassic Houcheng Formation of Hebei, China." ''Acta Geologica Sinica'', 80 (4): 467–473 (Full text. )〕 The fossils were found in the Houcheng Formation of Hebei Province, northeastern China.〔
This dinosaur was described in a report in the journal ''Acta Geologica Sinica'' by Chinese paleontologist Zhao Xijin and colleagues. ''Xuanhuaceratops'' had previously been mentioned in press as "Xuanhuasaurus", a ''nomen nudum''.
==Description==
''Xuanhuaceratops niei'' is known only from four fragmentary skeletons recovered from the Houcheng Formatio of Hebei Province, China. These skeletons share a number of distinct features with a potential close relative, ''Chaoyangsaurus'', discovered in the adjacent province of Liaoning, with the exception of several cranial formations.〔 Chief among these is the presence of an additional premaxillary tooth, although other differences in the quadrate and scapula have also been noted.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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