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《Acta Scientiarum Naturalium Universitatis Pekinensis》 2016-02
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Comparison of the Forefin of Chaohusaurus and Its Taxonomy Meaning, Early Triassic, Anhui Province

ZHOU Min;Geological Museum of Peking University;Department of Geology, Peking University;  
Due to the low number and bad preserved condition of the specimens, the anatomical features of Chaohusaurus have not been described in detail. As a result, there is a controversy about the membership of this genus. Based on some new specimens housed in the Geological Museum of Peking University, there are two styles of the forefins compared with the holotype, with differences in skeleton morphology and the mesopodial ossification. The cluster analysis of those specimens shows that there are two groups. Measurements of the forefins suggests that there are two trendlines, so the conclusion that Chensaurus xiaoxianensis and Chensaurus faciles are junior synonyms of Chaohusaurus geishanensis is not appropriate. There are at least two species of Chaohusaurus in Chaohu. Clarifing the diversity of this genus is of significance to the comparison of the Early Triassic ichthyosaurs in the world and the study of the early evolution of basal ichthyosaurs.
【Fund】: 国家自然科学基金(40920124002 41372016);; 现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)开放基金(123102);; 高等学校博士学科点专项科研基金(20120001110072);; 人才培养共建项目-资源共享类项目-北京高校博物馆联盟建设(体制改革)项目资助
【CateGory Index】: Q915
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