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In the geologic timescale, the Wuchiapingian or Wujiapingian (from in the Liangshan area of Hanzhong, Shaanxi Province ) is an age or stage of the Permian. It is also the lower or earlier of two subdivisions of the Lopingian Epoch or Series. The Wuchiapingian spans the time between and megaannum. It was preceded by the Capitanian and followed by the Changhsingian.
Regional stages with which the Wuchiapingian is coeval or overlaps include the Djulfian or Dzhulfian, Longtanian, Rustlerian, Saladoan, and Castilian.
The base of the Wuchiapingian Stage is defined as the place in the stratigraphic record where the conodont species Clarkina postbitteri postbitteri first appears. A global reference profile for this boundary (a GSSP) is located near Laibin in the Chinese Guangxi.
The top of the Wuchiapingian (the base of the Changhsingian) is at the first appearance of conodont species Clarkina wangi.
The Wuchiapingian contains two ammonoid : that of the genus Araxoceras and that of the genera Roadoceras and Doulingoceras.
A relatively diverse fish fauna is known from the coeval Kupferschiefer (Werra Formation, Germany), Marl Slate Formation (England) and Ravnefjeld Formation (Greenland), including, among others, the following genera: Acentrophorus, Acropholis, Boreolepis, Coelacanthus, Dorypterus, Janassa, Menaspis, Palaeoniscum, Platysomus, Pygopterus and Wodnika. The Hambast Formation of Iran yielded chondrichthyan faunas of Wuchiapingian to Changhsingian age. The Wuchiapingian layers produced teeth of the eugeneodontid Bobbodus.
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