闽西地区的晚二叠世沉积,一般划分为翠屏山组和大隆组。前者自下而上分为四个岩性段,下部的三段系陆相沉积,第四段的上部夹有较多的海相层,产腕足类等化石;后者产Pseudotirolites等菊石,笼统地与华南广见的大隆组对比。有关闽西大隆组的生物群,至今没有比较系统的研究,大隆组的顶底界线也没有统一的认识。本文通过研究永定抚 Late Permian sediments in western Fujian are generally divided into Cuipingshan Formation and Dalong Formation. The former is divided into four lithology segments from bottom to top. The lower three segments are facies sedimentary facies. The upper segment of the fourth segment contains more marine facies and produces brachiopods and other fossils. The latter produces ammonites such as Pseudotirolites, Contrast with the Dalong Formation widely seen in South China. There is no systematic study on the biota in the Dalong Formation in West Fujian Province. There is no uniform understanding of the top and bottom boundary of the Dalong Formation. This paper studies Yongding Fu