滇东晚二叠世植物群代表了长兴期华夏植物群最后衰退阶段的面貌，在古植物学、古生态学、植物古地理学等方面具有重要的研究意义。滇东晚二叠世植物化石中具有十分丰富的栉羊齿类植物。该类植物在华夏、欧美和安加拉植物区都有分布，但在华夏植物区华南亚区于晚二叠世仍繁盛。栉羊齿类通常只保存营养羽片，形态多变、种类繁多，已描述20余个属。由于大部分栉羊齿类没有相应繁殖器官的发现，目前对该类植物仍缺少全面、系统的了解。本项目拟以滇东晚二叠世植被中占重要丰度的栉羊齿类化石为研究对象，以其繁殖器官为切入点，通过比较形态学和比较解剖学等工作，完善对该类植物整体的认识，讨论其系统分类和多样性。在此基础上，与同时期其它植物区对比，阐明滇东地区晚二叠世栉羊齿类植物的区域特征，对于分析华夏植物区与同期其它植物区的相互关系及揭示华夏植物群的演化情况具有十分重要的意义。

The late Permian flora in eastern Yunnan represents the Cathaysian flora in Changhsingian, which has important significance in palaeobotany, palaeoecology and palaeogeography. There are a lot of pecopterids in the late Permian flora of eastern Yunnan. Pecopterids were widely distributed in Cathaysian, Euramerican and Angaran floras, and still flourished in the Cathaysian flora of southwest China in the late Permian. Pecopterids still lack a comprehensive and systematic understanding because they usually preserved as sterile pinnae without fertile organs, and the pinnae have varied morphology. This project intends to focus on the fertile organ fossils of the late Permian pecopterids in eastern Yunnan. Through morphological and anatomical studies, together with detailed comparisons, we will know more about the whole plant, the classification and diversity. In addition, this project will analyze the regional characteristics of the late Permian pecopterids in eastern Yunnan and try to provide evidence for the composition and evolution of the Cathaysian flora in the late Permian.