|Subdivision of the Permian system|
according to the ICS, as of 2017.
In the geologic timescale, the Wuchiapingian or Wujiapingian (from Chinese: 吴家坪; pinyin: Wújiāpíng; literally: 'Wu Family Flatland"' 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 259.1 and 254.14 million years ago (Ma). 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 Wuchiapingian was first used in 1962, when the Lopingian series of southwestern China was divided in the Changhsingian and Wuchiapingian formations. In 1973 the Wuchiapingian was first used as a chronostratigraphic unit (i.e. a stage, as opposed to a formation, which is a lithostratigraphic unit).
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 province of Guangxi.
|Amphibians of the Wuchiapingian|
|Inta Formation, Russia|
|Synapsids of the Wuchiapingian|
Cistecephalus Assemblage Zone; Tropidostoma Assemblage Zone, both in the Karoo Basin, South Africa and Zambia
Mildenhalls, Fort Beaufort; Karoo Basin, Beaufort West, both in South Africa, possibly Chiwera Beds, Malawi
- "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
- "陕西汉中梁山吴家坪灰岩的再研究 (Restudies on the Wujiaping Limestone Liangshan of Hanzhong, Shaanxi)". Retrieved 29 November 2012.
- Gradstein, F. M.; Ogg, J. G. & Smith, A. G.; 2004: A Geologic Time Scale 2004, Cambridge University Press
- "Wuchiapingian". GeoWhen Database, International Commission on Stratigraphy (ICS). Retrieved 4 March 2010.
- Kanmera, Kametoshi; and Nakazawa, Keiji, 1973, Permian-Triassic relationships and faunal changes in the eastern Tethys, in Logan, A.; and Hills, L. V.; eds.; The Permian and Triassic Systems and their mutual boundary, Canadian Society of Petroleum Geologists, Memoir 2, pp. 100–129
- Jin, Y.; Shen, S.; Henderson, C. M.; Wang, X.; Wang, W.; Wang, Y.; Cao, C. & Shang, Q.; 2006: The Global Stratotype Section and Point (GSSP) for the boundary between the Capitanian and Wuchiapingian Stage (Permian), Episodes 29(4), pp. 253–262
- Sahney, S. & Benton, M.J. (2008). "Recovery from the most profound mass extinction of all time" (PDF). Proceedings of the Royal Society B: Biological Sciences. 275 (1636): 759–65. doi:10.1098/rspb.2007.1370. PMC 2596898. PMID 18198148.
- GeoWhen Database - Wuchiapingian
- Upper Paleozoic stratigraphic chart at the website of the subcommission for stratigraphic information of the ICS