陕南早寒武世早期管柱状生物化石新发现  

DISCOVERY ON THE COLUMN-LIKE FOSSILS FROM THE EARLY EARLY CAMBRIAN OF SOUTH SHAANXI

作　　者：刘云焕[1,2] 邵铁全[1] 房启飞[1] 冯健雪[1] 郑曦[1] 

机构地区：[1]长安大学地球科学与资源学院 国土资源部成矿作用及其动力学重点实验室,西安710054 [2]西北大学,西安710069

出　　处：《微体古生物学报》2009年第3期291-296,共6页Acta Micropalaeontologica Sinica

基　　金：国家重点基础研究发展计划项目(2003CB214602-02)提供资助

摘　　要：繁殖是生物体产生子代的现象,是生物体最基本的特征之一。最近作者在陕南宁强宽川铺地区早寒武世最早期的宽川铺生物群中发现了数十枚管柱状生物化石,首次发现这些管柱状生物化石具可能的"断裂生殖"特征。在部分管柱状生物化石上可清晰分辨出"收缢带"、"收缢纹"和"新生单节"等断裂生殖特征,据此建立可能的管柱状生物"断裂生殖"生殖发育序列。This paper describes several tens of 3D-preserved phosphatized tube and column-like fossils which are found from the Kuanchuanpu Boita of the early Cambrian in Ningqiang County, South Shaanxi Province. Some rare characteristics about ＂budding reproduction＂ and ＂ breaking reproduction＂ for asexual reproduction are found firstly in these tube and column-like fossils. Some characteristics of ＂shrink zone＂ ＂shrink veins＂ and ＂newborn segment＂ are recognized clearly, so the developmental stages of the ＂ breaking reproduction＂ are built.

关 键 词：管柱状化石 断裂生殖 早寒武世早期 宽川铺生物群 陕西宁强 

分 类 号：Q911[天文地球—古生物学与地层学]