 The top of the Capitanian (or the base of the Wuchiapingian) is defined as the place in the stratigraphic record where the conodont subspecies "Clarkina postbitteri postbitteri" first appears.The top of the Wuchiapingian (or the base of the Changhsingian) is defined as the place in the stratigraphic record where the conodont species "Clarkina wangi" first appears.The global reference section is profile D at Meishan, in the type area in Changxing.