二叠纪末集群灭绝是显生宙最大规模的生物灭绝事件，晚二叠世植物化石记录中蕴含该事件演化的重要信息。近来，在贵州盘县地区龙潭组的露头及钻孔岩芯中发现有丰富的植物化石保存，主要为枝叶、种子和根，部分化石还有角质层和生殖羽片保存，具有较高的研究价值。本项目拟以盘县龙潭组保存的植物化石为研究对象，依据宏观形态与/或角质层微细构造特征，开展系统分类学研究。在准确分类鉴定的基础上，查明植物群组成及性质，进而将其与国内外同期代表性植物群进行对比。最后分析各门类植物化石特征及群落特征，并结合区域地质背景和沉积环境，探讨研究区晚二叠世古环境。本课题不仅可为我国晚古生代华夏植物群的研究提供新资料，还可为二叠系-三叠系之交重大地质突变期的生物灭绝原因探讨提供新证据。

Permian-Triassic mass extinction is the biggest biotic extinction in the Phanerozoic, and plant fossils of the Late Permian can imply important information declaring the extreme crisis on the earth. Recently, abundant well preserved plant fossils are discovered from the outcrops and boreholes of the Late Permian Longtan Formation in Panxian, Guizhou Province. These plant fossils are mainly preserved in the form of leaves, seeds and roots. Some of these fossils are preserved as compressions with cuticles and some are fertile pinnules. This project will carry out a study on these valuable fossils. Based on the morphological and/or cuticular micro-structures, the valid systematic position of these fossils can be determined. After detailed study of the nature of the flora and reconstructing the face of the flora, the plant fossils are made a comprehensive comparison to other representative floras over the same period at home and abroad. Finally, through the analysis of fossils, together with the regional geological setting and depositional environment, the palaeoenvironment of these plants can be identified. This project can provide new data for the study of Late Permian Cathaysian flora, and it would also be more significant for the study of Permian-Triassic mass extinction.