豫西寒武系第三统张夏组鲕粒灰岩中机会生物留下的遗迹化石  

OPPORTUNISTIC TRACE FOSSILS FROM THE CHANGHIA FORMATION ( THIRD SERIES , CAMBRIAN ), WESTERN HENAN

作　　者：齐永安[1] 李妲 代明月[1] 王敏[1] 

机构地区：[1]河南理工大学资源环境学院,河南省生物遗迹与成矿过程重点实验室,河南焦作454000

出　　处：《古生物学报》2013年第1期80-85,共6页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(41072003);河南省基础与前沿课题(112300413213);高校博士点基金博导类联合课题(20114116110001)资助

摘　　要：豫西寒武系第三统张夏组鲕粒灰岩中赋存大量机会种留下的遗迹化石Planolites montanus,沿层面水平或低角度倾斜分布,呈无定向弯曲状。潜穴管不发育衬壁、充填物为土黄色的灰泥。尽管鲕粒灰岩形成于高能的碳酸盐岩浅滩环境,但P.montanus造迹生物却在鲕粒沉积物深层活动,不易受水动力搅动作用影响,故留下深阶层进食潜穴。造迹生物以鲕粒表面的细菌及黏附的其他有机质为食,潜穴充填物应为其肠道消化的残余物。从机会生态学角度分析,P.montanus造迹生物能够根据环境或食物来源选择适合其生存的策略,具有较短的生命周期和较强的繁殖能力,对极端环境的适应能力强,并且作为狭适性动物对其生存环境具有专属性。Abundant trace fossils of Planolites rnontanus are reported from the oolitic limestones of the Changhia Formation （Third Series, Cambrian）, Western Henan. The burrows display horizontal to low-angle inclined structures without preferential orientation. They are characterized by no linings and are filled with yellow-brown marl. The oolitic limestone is an indicator of high energy carbonateshoal belt. However, the trace-makers herein are considered to be the inhabitation fauna within deep substrate that are no longer impacted by strong currents. They were deep tiering feeding burrows associated with bacteria and other organic matter on the surface of ooids which act as great source of food. The burrow filling must be their digestive products. The ecological strategy might be to adapt short productive cycle, strong fertility as well as stenotropic environmental conditions which were suitable to the extreme environment.

关 键 词：Planolites montanus 机会生物 遗迹化石 鲕粒灰岩 张夏组 豫西 

分 类 号：P618.13[天文地球—矿床学]