The discovery of conchostracan fossils in the Upper Permian Linxi Formation of Linxi area,Inner Mongolia,and its geological significance
The discovery of conchostracan fossils in the Upper Permian Linxi Formation of Linxi area,Inner Mongolia,and its geological significance
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发表时间：
2012
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通讯作者：
Wang Jun-tao
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作者：
Wang Jun-tao
前人对内蒙古林西县上二叠统林西组和贾拉特旗陶海营子组的研究表明，该区主要化石为淡水双壳类和植物化石。除陶海营子组外，该地区从未发现过甲壳类化石。因此，本研究首次在内蒙古林西县东部官地段林西组上部发现了甲壳类化石，并初步鉴定为黄氏林西组(sp.nov)，环藻化石cf.gazimuri novojilov和Sphaeroreothefcatus(Lutkevich)林溪组珊瑚化石的发现为确定林溪组的时代、地层对比和古地理重建提供了可靠的化石证据，具有重要的地层和古地理构造意义。
Previous researches on the Upper Permian Linxi Formation in Linxi County and Taohaiyingzi Formation in Jalaid Banner show that the main fossils are freshwater bivalves and plant fossils.Except for Taohaiyingzi Formation,conchostracan fossils had never been discovered in this area.In this study,the conchostracan fossils were discovered firstly in the upper part of the Linxi Formation in Guandi section of eastern Linxi County,Inner Mongolia,which are preliminarily identified as Huanghestheria linxiensis Niu(sp.nov).,Cyclotunguzites cf.gazimuri Novojilov,and Sphaerorthothemos cf.cellulatus(Lutkevich) respectively.Therefore,the conchostracan fossils discovery in Linxi Formation provides the reliable fossil evidence for the determination of the age of Linxi Formation as well as for stratigraphic correlation and palaeogeographic reconstruction.This achievement has important stratigraphic and palaeogeographicy tectonic significance.