山东寒武系苗岭统三叶虫消化系统的化石证据  

Digestive structures in Cambrian Miaolingian trilobites from Shandong, North China

作　　者：孙智新 曾晗 赵方臣[1,2,3] SUN Zhi-xin;ZENG Han;ZHAO Fang-chen(State Key Laboratory of Palaeobiology and Stratigraphy^Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China;Center for Excellence in Life and Palaeoenvironment,Chinese Academy of Sciences,Nanjing 210008,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京210008 [2]中国科学院生物演化与环境卓越创新中心,南京210008 [3]中国科学院大学,北京100049

出　　处：《古生物学报》2021年第1期166-175,共10页Acta Palaeontologica Sinica

基　　金：中国科学院战略性先导科技专项(B类)(XDB26000000);国家自然科学基金(41921002,41902014,42072006);现代古生物学和地层学国家重点实验室自主项目(20181105,20192111)联合资助。

摘　　要：三叶虫是寒武纪演化动物群中最引人注目的成员之一,其内部解剖结构一直以来受到广泛关注。与其他非生物矿化软体结构相比,三叶虫的消化系统更容易留下化石记录,为探索其内部结构提供了难得的机会。本文描述了来自山东省潍坊市寒武系馒头组的Proasaphiscus,Lioparia,Deiradonyx和Iranoleesia,以及临沂市寒武系张夏组的Maotunia共五个三叶虫属的消化系统。这些保存较好的标本展示了三叶虫的四对头部消化腺,以及可能的头部消化腺与"嗉囊"共存的例子,为了解三叶虫消化系统尤其是头部消化系统的结构提供了新的信息。三叶虫非生物矿化软体结构的保存也显示了这些层位有发现布尔吉斯页岩型特异埋藏化石的潜力。The preservation of trilobite digestive structures provides a rare opportunity to explore its internal anatomy.Here we report the digestive structures of five trilobite genera from Shandong Province,North China.The trilobite genera include Proasaphiscus,Lioparia,Deiradonyx,Iranoleesia from the Cambrian Miaolingian Mantou Formation in Weifang area,and Maotunia from the Cambrian Miaolingian Zhangxia Formation in Linyi area.The well-preserved specimens displayed examples of four pairs of cephalic digestive glands,and a digestive system consisting of both paired digestive glands and a crop.Our discovery provides new information for understanding the pattern of the trilobite digestive structures,especially in the cephalon.

关 键 词：乌溜阶 鼓山阶 馒头组 张夏组 华北板块 

分 类 号：Q915.2[天文地球—古生物学与地层学]