贵州剑河八郎寒武系“清虚洞组”中上部褶颊虫类三叶虫  

PTYCHOPARIID TRILOBITES FROM THE UPPER PART OF THE“TSINGHSUTUNG FORMATION”(STAGE 4,CAMBRIAN)AT BALANG VILLAGE,JIANHE COUNTY,GUIZHOU PROVINCE

作　　者：王铭坤 赵元龙[1] 

机构地区：[1]贵州大学贵州古生物研究中心,贵阳550025

出　　处：《古生物学报》2016年第2期147-159,共13页Acta Palaeontologica Sinica

基　　金：国家重点基础研究发展规划项目(973)(2013CB835002;2015FY310100);国家重点自然科学基金(41330101);国家自然科学基金(41172005);贵州大学研究生创新基金(研理工2016042)联合资助

摘　　要：贵州剑河八郎一带发育一套以灰岩为主的"清虚洞组",中上部的泥岩、灰岩中含有大量的三叶虫,其中褶颊虫类三叶虫共6属7种,包括2相似种:丹寨南皋盾甲虫Nangaops danzhaiensis,横宽八郎村虫Balangcunaspis transversus,南京幕府山虫(相似种)Mufushaniacf.nankingensis,优美小丹寨虫Eosoptychoparia(Danzhaina)lilia,大型小遇仙寺虫Yuehsienszella magna,高洞始褶颊虫Eoptychoparia gaodongensis,云南始褶颊虫(相似种)Eoptychopariacf.yunnanensis。这些褶颊虫类三叶虫以Nangaops及Eoptychoparia为主,Nangaops,Balangcunaspis,Mufushania及Eosoptychoparia(Danzhaina)均上延至凯里组,Eoptychoparia为典型清虚洞组的常见分子。"清虚洞组"中上部大量褶颊虫类三叶虫的发现,不仅完善了本区"清虚洞组"褶颊虫类三叶虫的组成面貌,而且为认识早期褶颊虫类的演化和研究寒武系都匀阶的生物地层提供了新的材料。The ＂Tsinghsutung Formation＂at Songshan section near Balang Village, Jianhe County,Guizhou Province is dominated by limestones with mudstone interbeds in its middle-upper part.The mudstone is richly fossiliferous with ptychopariid trilobites. This paper describes seven species referred to 6 genera.They are Nangaops danzhaiensis, Balangcunaspis transversus, Mufushania cf. nankingensis, Eosoptychoparia（Danzhaina） lilia, Yuehsienszella magna,Eoptychoparia gaodongensis and Eoptychoparia cf.yunnanensis.Nangaops and Eoptychoparia are more common than the other genera and the latter genus is predominated in the typical Tsinghsutung Formation in northern Guizhou.Nangaops, Balangcunaspis, Mufushania and Eosoptychoparia（Danzhaina） range upward from the ＂Tsinghsutung Formation＂into the overlying Kaili Formation.The finding of these ptychopariid trilobites in the middle-upper of the＂Tsinghsutung Formation＂not only enriches the trilobite component of this unit,but also throws new light on the evolution of primitive ptychopariids.In addition,it provides new data for the biostratigraphic research of Cambrian Stage 4.

关 键 词：褶颊虫类三叶虫 “清虚洞组” 都匀阶 寒武系 贵州 

分 类 号：Q915[天文地球—古生物学与地层学]