安徽巢湖平顶山地区下三叠统地层序列清晰完整,含有丰富的化石,对研究早三叠世的沉积环境及生物大灭绝后的复苏过程具有重要意义。本文对安徽巢湖平顶山地区下三叠统和龙山组产出的20个菊石化石标本进行了系统鉴定,共鉴定出4个属,分别是假色尔特菊石、似西伯利亚菊石、幼菊石和提罗菊石。通过对菊石个体生态学、菊石群体生态学和和龙山组岩性特征进行分析,推测在早三叠世中期该地区处于碳酸盐台地较浅水的沉积环境。 The sequence of the Lower Triassic strata in the Pingdingshan area of ​​Chaohu, Anhui Province is clear and complete and rich in fossils. It is of great significance to study the sedimentary environment in the Early Triassic and the recovery process after the mass extinction. In this paper, 20 fossilized fossils from the Lower Triassic and Longshan Formation in Pingdingshan, Chaohu, Anhui Province were systematically identified. Four genera were identified, namely, fake Celtic ammonites, Siberian ammonites, Stone and Tiruo ammonites. Based on the analysis of individual ecology of ammonification, ecology of ammonification population and lithology characteristics of Heilongshan Formation, it is speculated that the area was located in a shallower sedimentary environment of carbonate platform in the middle of Early Triassic.