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本文研究了塔里木盆地奥陶系苔虫的分布延限和演化规律。苔虫的演化分为四个阶段:第一阶段为鹰山组—一间房组中下部沉积期,苔虫多样性和丰度均很低;第二阶段为一间房组上部—吐木休克组沉积期,苔虫的多样性处在一种波动上升的状态;第三阶段包括良里塔格组良五段—良四段沉积期,苔虫多样性和丰度均有一定程度的增加,而且绝大部分属种在接下来的第四阶段都有出现;第四阶段在良里塔格组良三段—良一段沉积期,是苔虫总体多样性明显增长的时期,也是本区奥陶纪苔虫的重要辐射期。随后,展开苔虫的多样性分析的研究。研究发现塔里木盆地奥陶系苔虫的演化趋势与世界范围的演化趋势基本一致,说明是受苔虫宏演化规律控制的。
This paper studies the distribution and evolution of Ordovician moss in the Tarim Basin. The evolution of the moss is divided into four stages: the first stage is the Yingshan Formation - the middle and lower sedimentation period of a house group, the diversity and abundance of the weevil are very low; the second stage is a house group upper - spit During the sedimentation period of shock group, the diversity of the moths was in a state of fluctuating fluctuation. In the third stage, the Lianglidage Formation, the fifth member and the fourth member of Lianglian Formation, the diversity and abundance of the weevil Increased, and most of the genus in the fourth stage of the next have appeared; the fourth stage in the Lianglitage Formation of the third section - a period of deposition, is the total diversity of the moss significantly increased period, but also the area Ordovician moss important radiation period. Subsequently, the study on the diversity of moths was carried out. It is found that the evolutionary trend of the Ordovician moss in the Tarim Basin is basically consistent with the worldwide evolution trend, indicating that it is controlled by the macro-evolution of the moth.