The Norian megalodontid fauna in Qinghai-Tibet Plateau,western China  

作　　者：YAO HuaZhou ZHANG RenJie SHA JingGen WANG JianXiong NIU ZhiJun DUAN QiFa 

机构地区：[1]Wuhan Institute of Geology and Mineral Resources, China Geological Survey, Wuhan 430223, China [2]Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008, China

出　　处：《Science China Earth Sciences》2012年第10期1620-1626,共7页中国科学（地球科学英文版）

基　　金：supported by National Natural Science Foundation of China (Gant No. 41172025);China Geological Survey Project (Grant No. 1212011120116)

摘　　要：Many well-preserved silicified megalodontids found from the Jiapila Formation of the Upper Triassic in western China show great variations in the amorphous teeth and the massive hinge plate,making the internal molds vary greatly in size and shape.Thus,the internal molds of megalodontids do not always provide reliable taxonomic characters.As a result,about 3/4 of the 132 species and 6 of 9 genera of Triassic Megalodontidae erected on the basis of internal molds have to be revised.The revised definitions of genera Neomegalodon,Triadomegalodon,and Conchodon are given in this paper.Many well-preserved silicified megalodontids found from the Jiapila Formation of the Upper Triassic in western China show great variations in the amorphous teeth and the massive hinge plate, making the internal molds vary greatly in size and shape. Thus, the internal molds of megalodontids do not always provide reliable taxonomic characters. As a result, about 3/4 of the 132 species and 6 of 9 genera of Triassic Megalodontidae erected on the basis of internal molds have to be revised. The revised definitions of genera Neomegalodon, Triadomegalodon, and Conchodon are given in this paper.

关 键 词：Qinghai-Tibet Plateau western China NORIAN megalodontids 

分 类 号：Q958.12[生物学—动物学] P534.51[天文地球—古生物学与地层学]