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Zhongyuansaurus : ウィキペディア英語版 | Zhongyuansaurus
''Zhongyuansaurus'' is an extinct genus of ankylosaurid ankylosaurian dinosaur from the Cretaceous of Ruyang, Henan, China. It is known from remains including skull, arm, pelvic, and tail bones. It is distinguished by characteristics such as a flat roof to the skull, a straight ischium, and the location of muscle attachments on the upper arm. The type species, ''Z. luoyangensis'', was described by Xu and colleagues in 2007. ''Zhongyuansaurus'' was described by Xu ''et al.'' as the first Chinese nodosaurid based primarily upon the absence of a tail club and its elongate skull, but was reevaluated in 2008 by Kenneth Carpenter and colleagues as a shamosaurine ankylosaurid, a type of ankylosaurid lacking a tail club. A new cladistic analysis performed by Thompson ''et al.'', 2011 suggests that ''Zhongyuansaurus'' is the basalmost known ankylosaurine and thus it is the only known species of this clade that lacking a tail club. ==See also==
* Timeline of ankylosaur research
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