Ratified 2018-06-26 Stratotype Point Base of Wuliuan Wuliu-Zengjiayan (east Guizhou, China) Trilobite, FAD of Oryctocephalus indicus Location of Stratotype Point Base of Miaolingian true Base of Miaolingian Stratotype Point Base of Miaolingian Stratotype Point Base of Wuliuan at the base of a silty mudstone layer (within bed 9) 52.8m above the base of the Kaili Formation in the Wuliu-Zengjiayan section