“…A set of microbialites usually formed on the carbonate platforms in the aftermath of the EPME (e.g., Lehrmann et al, 1998;Wang et al, 2005;Kershaw et al, 2007Kershaw et al, , 2012Tian et al, 2019;Foster et al, 2020). Studies on several microbialite-bearing sections, including Dajiang, Taiping and Pojue sections, suggest that the PTB is at the base of microbialites, for the first occurrence of Hindeodus parvus (Jiang et al, 2014;Wang et al, 2016;Xiao et al, 2018;Chen et al, 2019). Although the precise age of the terminal PTBMs is unsure, the high-resolution conodont biostratigraphic zonation studies of Dajiang and Cili sections show the first occurrence of Isarcicella isarcica from the thinbedded limestone overlying the PTBMs (Jiang et al, 2014;Wang et al, 2016), correlating to the second phase of the Permian-Triassic crisis, i.e., Earliest Triassic mass extinction (ETME; Song et al, 2013).…”