四川重庆北碚、合川炭坝一带(图1)的陆相侏罗系自流井组,顶、底分界明确,层序清楚,发育齐全,化石丰富,是四川盆地重要的标准地区之一。以前对该剖面的化石未作过系统采集和研究;1972年为了编写西南地区古生物图册,笔者与成都地质矿产研究所的白云洪、李玉文、田传荣以及原西南石油学院的魏家玺同志,在北碚施家 The continental Jurassic Artesian well group in the Beichuan and Hechuan-Carbon Dam areas (Figure 1) in Sichuan Province has clear boundary and well-defined boundaries with complete development and rich fossils. It is one of the important standard areas in Sichuan Basin. In the past, there was no systematic collection and study on the fossils in this section. In 1972, in order to compile the paleontology book of southwestern China, Bai Yunhong, Li Yuwen, Tian Chuanrong from Chengdu Institute of Geology and Mineral Resources and Comrade Wei Jiaxi from the former Southwest Petroleum Institute, Family