Conodont FAD Clarkina postbitteri postbitteri true Ratified 2004 Base of Lopingian Stratotype Point Base of Wuchiapingian Base of Bed 6k in the Penglaitan Section Location of Stratotype Point Base of Lopingian Stratotype Point Base of Wuchiapingian Stratotype Point Base of Lopingian Episodes 29/4, p. 253 262, 2006 Penglaitan, Guanxi Province, South China