关键词: 菊石, 上三叠统, “法郎组”, 罗平, 云南省

Abstract: The present study is based on ammonoids collected from the strata above the ammonoid Trachyceras multituberculatum zone of Wayao Member of “Falang Formation” (Late Triassic) at the Niubudai Section in Luoping County, Eastern Yunnan Province. Eight species of four genera, including one conform species and three indeterminate species were recognized, among which Trachyceras aonoides, Simonyceras simonyi are firstly found in China. According to their assemblage and stratigraphic distribution, two ammonoid zones were recognized in ascending order: Trachyceras aonoides Zone, Austrotrachyceras triadicum Zone, corresponding to the middle-late Early Carnian of Late Triassic in age.

Key words: ammonoids, Late Triassic, “Falang Formation”, Luoping County, Yunnan Province