黔西地区卡以头组叶肢介动物群  

THE CONCHOSTRACAN FAUNA FROM THE KAYITOU FORMATION OF WESTERN GUIZHOU,CHINA

作　　者：楚道亮 童金南[1] 喻建新[1] 宋海军[1] 田力[1] 

机构地区：[1]中国地质大学生物地质与环境地质国家重点实验室,武汉430074

出　　处：《古生物学报》2013年第3期265-280,共16页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(41272372);中国地质调查局陆相早三叠世大龙口阶建阶研究项目(1212011020103);早-中三叠世不同地质区地层系统的完善与对比研究项目(1212011120116)联合资助

摘　　要：黔西地区发育良好的陆相二叠系-三叠系界线地层,近年来该地区的二叠纪-三叠纪过渡期陆相生物群研究较多,主要包括植物化石和孢粉化石。文中研究了产自该地区卡以头组的叶肢介动物群,并对部分标本采取电镜扫描来研究其微细结构,共分类描述2属11种及3个未定种,其中Euestheria属有5种和2个未定种,Palaeolimnadia属有6种和1个未定种。该研究既丰富了黔西地区二叠纪-三叠纪之交的生物群面貌,对于探讨这一重大地质突变期陆相生物群演变具有指示作用,也为陆相二叠系-三叠系界线的划分和对比提供了重要参考依据。Terrestrial Permian-Triassic boundary(PTB) sequences are well exposed in the western Guizhou,South China.Recent studies show that there are diverse plant fossils and palynomorphs near the PTB strata of the western Guizhou Province.This study focuses on the conchostracan fauna of the Kayitou Formation.Eleven determined species and three undetermined species in two genera of conchostracans are identified based on their microstructure under SEM(Scanning Electron Microscope).Among them,five determined species and two undetermined species belong to Euestheria and six determined species and one undetermined species belong to Palaeolimnadia.These abundant conchostracan data are useful in understanding the evolution of terrestrial ecosystem during the Permian-Triassic transition.In addition,conchostracans reported here are significant fossils in the correlation of terrestrial PTB.

关 键 词：叶肢介 卡以头组 二叠纪-三叠纪过渡期 黔西 

分 类 号：Q915[天文地球—古生物学与地层学]