陕南宁强埃迪卡拉纪末期管状化石生物群新材料  

NEW MATERIAL OF THE TERMINAL EDIACARAN TUBULAR FOSSILS FROM NINGQIANG,SOUTHERN SHAANXI,CHINA

作　　者：陈伟 蔡耀平[1] CHEN Wei;CAI Yaoping(State Key Laboratory of Continental Dynamics,Shaanxi Key Laboratory of Early Life and Environments,Department of Geology,Northwest University,Xi'an 710069,China)

机构地区：[1]大陆动力学国家重点实验室,陕西省早期生命与环境重点实验室,西北大学地质学系,西安710069

出　　处：《微体古生物学报》2021年第4期301-310,共10页Acta Micropalaeontologica Sinica

基　　金：国家重点研究发展计划项目(2017YFC0603101);国家自然科学基金项目(41972013,41890840,41621003);陕西“三秦”学者项目、陕西科技创新团队项目(2019TD 012);大陆动力学国家重点实验室项目(201210128);中国科学院战略性先导科技专项(XDB26000000)共同资助。

摘　　要：埃迪卡拉纪末期的化石生物群是研究动物矿化起源和演化的直接证据来源,但是该段地史时期古生物资料的匮乏导致对这些重大演化历史的认识仍然处于初步阶段,因此,寻找更多的化石材料以及更多的化石类群是深化研究该段生命演化史的唯一途径。本文报道了陕南宁强圆宝山剖面发现的埃迪卡拉纪末期管状化石新材料。新发现的化石产于灯影组顶部,位于寒武纪早期Anabarites trisulcatus-Protohertzina anabarica组合带之下。目前发现的化石类型主要包括Cloudina hartmannae Germs 1972、C.ningqiangensis Cai et al.,2017和Multiconotubus chinensis Cai et al.,2017,此外还有一些与寒武纪早期化石形态相似的管状化石。这些化石材料的发现扩大了埃迪卡拉纪末期化石生物群的多样性以及古地理分布范围,为研究矿化动物群在该段地史时期的演化历史提供了最直接的证据。The origin and diversification of mineralizing animal fossils in the terminal Ediacaran Period represents one of the remarkable evolutionary innovations in the history of life.Due to the scarcity of fossil material,elaborated evolutionary history in the terminal Ediacaran Period remains poorly understood.Therefore,new fossil materials are of pivotal importance to our understanding of the origin and early evolution of animal biomineralization.Here we report the new fossil material from the Ediacaran Dengying Formation at the Yuanbaoshan section in Ningqiang,southern Shaanxi Province,China.Fossil horizon is located in the top of the Ediacaran Dengying Formation,just below the early Cambrian Anabarites trisulcatus-Protohertzina anabarica Assemblage Zone.The new fossil assemblage consists of Cloudina hartmannae Germs,1972,C.ningqiangensis Cai et al.,2017,Multiconotubus chinensis Cai et al.,2017 and a number of unnamed fossils sharing morphological similarities to some early Cambrian tubular taxa.The Yuanbaoshan fossils expand the diversity and paleogeographic range of Cloudina,Multiconotubus,and a number of unnamed tubular fossils in the terminal Ediacaran Period and provides direct evidence for the study of the evolutionary history of animal mineralization.

关 键 词：管状化石 埃迪卡拉纪 灯影组 陕南 

分 类 号：Q911[天文地球—古生物学与地层学]