• 责任者：Mu Lin (Nanjing Institute of Geology and Palaeontology ; Chinese Academy of Sciences ; Nanjing 210008 ; China)
• 刊名：Acta Palaeontologica Sinica
• 出版年：2011
• 卷期：50(4)
• 关键词：早二叠世 ; Lower Permian ; 中二叠世 ; Middle Permian ; 菊石超目 ; Ammonoidea ; 生物地层学 ; biostratigraphy ; 中国 ; China
• 页码：p.439-449
• 图表：3 illus., 41 refs.
• 分类号：1200
• 出版序号：20122574
• issnNo：ISSN0001-6616
• isbnNo：CN32-1188/Q

In this paper, the characteristic ammonoid faunas around the boundary between the Lower and Middle Permian in China are reidentified and reviewed. Based on a number of ammonoid occurrences materials near the Kungurian-Roadian boundary previously reported, the author considers that ammonoid faunas near the Lower-Middle Permian boundary mainly occur in South and Northwest China. Based on a new study of a number of the ammonoid faunas, the lower part of the Shuangbaotang Formation is assigned to the Kungurian, the middle to upper part of the formation to the Roadian;the Fanjiatun Formation to the Roadian or Wordian; the Jiala Formation from Xigaze, Tibet and the Urulung Formation at Duilongdeqing, Tibet, to Roadian. The Shuangbaotang Section in Gansu Province and the Dongwuli Section in Zhejiang Province are considered the most promising localities to solve the problem of the Kunguian-Roadian boundary in terms of ammonoids.