牙形动物

牙形石动物分类归属研究新进展&牙形石是最早的脊椎动物

New advances in affinity of conodonts ── the earliest vertebrates

浙江长兴地区二叠纪与三叠纪之交牙形石动物群及地层意义

The Permo-Triassic conodont fauna in Changxing area , zhejiang province and its Stratigraphic Significance

本文对深海硅质岩系中这一界线地层牙形石动物群特征进行了简要的描述。

We also concisely described the characteristics of the conodont fauna through the boundary strata .

第一个牙形石动物是一个科学家20世纪80年代中期在爱丁堡附近的海滩上发现的。

The first conodont animal was found by a scientist on a beach near Edinburgh in the mid-1980s .

英国古生物学家们通过牙形石动物的软体解剖学研究，发现眼睛、脊索、神经索、肌肉组织、尾鳍等软组织；

The soft anatomy of conodont shows some soft tissues including eyes , notochord , nerve cord , myomeres and caudal fin .

结合古地磁和构造地质资料分析，作者认为范家屯组中的牙形刺动物群生活于二叠纪北温带温凉的水域。

Based on palaeomagnetic data and tectonic analysis , the present authors concluded that this conodont fauna were from Permian Northern Temperate Zones .

对江西省信丰县铁石口剖面晚二叠世长兴阶至铁石口阶下部的牙形石动物群有了新的认识。

A detailed research has been worked on the Late Upper Permian conodont fauna of Tieshikou section in Xinfeng area , Jiangxi Province .

水体较浅的近滩潮坪相和水体较深的近台边缘硅质岩盆地相则不适宜牙形石动物生存。

Peri-beach tide flat facies with shallow water body and peri-platform margin siliceous rock basin facies with deeper water body are unfavourable for the living of conodont animals ;

通过综合研究得出：（1）最适合牙形石动物繁衍生息的环境是浅水碳酸盐岩台地相和台前凹陷相，尤以台前凹陷相最宜。

The synthetical study shows that 1 . the environments favourable for the breeding and living of conodont animals are shallow - water carbonate platform facies and platform front depression facies , especially the latter ;

经过对奥陶纪全球各板块古地理位置和塔里木板块周边古特提斯洋洋流情况的分析，提出塔里木板块奥陶纪牙形石动物群分区归属期次性变化是由板块运动和洋流共同作用导致的。

After analyzing the paleogeographic reconstruction and the paleo Tethys Ocean flow surrounding the Tarim plate , a point was made that the alteration of conodont faunas of the Ordovician on the Tarim plate was jointly caused by the plate tectonics and ocean currents .