早奥陶世疑源类埋藏后的形体及纹饰变化  

POSSIBLE INFLUENCES OF TAPHONOMIC FACTORS ON SHAPE AND ORNAMENTATION OF FOSSIL ACRITARCHS FROM EARLY ORDOVICIAN

作　　者：许玩宏[1] 

机构地区：[1]惠州大学地理系,广东惠州516015

出　　处：《微体古生物学报》2001年第1期97-100,共4页Acta Micropalaeontologica Sinica

基　　金：广东省自然科学基金!(编号 :984175 );全国高等学校博士学科点专项科研基金资助项目

摘　　要：赖以鉴定的疑源类化石仅保留下褶皱的囊壁而原生质已流失 ,由于成岩过程中围岩挤压或有机质壳壁干水收缩而使化石轮廓、纹饰发生变化应普遍可见。本文以作者在贵州三都地区阿仑尼克期地层发现的 Striatothecaprincipalis保存形态连续变化系列为基础 ,论述埋藏作用对疑源类保存形态的影响 ,这是利用埋藏学资料防止属种误订的一个典型示例 。Abundant well preserved acritarch specimens of Striatotheca principalis Burmann,1970 were discovered from the Xiayangao Member of the Tonggao Formation ( Arenigian ) in Sandu area, Guizhou Province; among them, an interim sequence of preserved types of Striatotheca principalis was found. Based on this material, the author focused on possible influences of taphonomic factors on shape and ornamentation of fossil acritarchs, which is of great significance in identifying the fossil microphytoplankton accurately.

关 键 词：疑源类埋藏 纹饰异常 轮廓变化 早奥陶世 贵州 

分 类 号：Q91[天文地球—古生物学与地层学]