Conodonts and Carbon Isotopes during the Permian-Triassic Transition on the Napo Platform, South China

Chen, Yan; Qian, Ye; Jiang, Haishui; Wignall, Paul B.; Yuan, Jinling

doi:10.1007/s12583-018-0884-3

Cited by 13 publications

(1 citation statement)

References 58 publications

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“…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).…”

Section: Extinction Pattern Of Ostracods During the Permian-triassicmentioning

confidence: 99%

Ostracodal evolution during the Permian–Triassic transition at the Youping section of the Nanpanjiang Basin

Huang²,

Sun³

et al. 2023

Front. Ecol. Evol.

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The Permian–Triassic mass extinction has been considered the largest bio-crisis of the Phanerozoic, with more than 90% of marine species extinct. Previous studies showed that ostracods suffered various extinction patterns in different localities and were relatively enriched in the lowermost Triassic shallow marine microbialites. Multiple hypotheses have been put forward to explore the reasons for this phenomenon. Abundant ostracod fossils were collected from the microbialite-bearing Youping section in the Nanpanjiang Basin. 45 species in 22 genera from Wujiaping Formation increased dramatically to 104 species in 33 genera from the microbialites of basal Luolou Formation. However, Ostracods from the Youping section suffered severe extinction during the second phase of the Permian–Triassic crisis, i.e., the earliest Triassic mass extinction (ETME), rather than the first phase, i.e., the latest Permian mass extinction (LPEM). In addition, the Sørenson coefficient has been used to examine the similarity of faunal associations among different sections of the Permian–Triassic transitional beds. There was no significant differences for ostracods between microbialites and non-microbialites sections based on similarity analysis. Thus, we proposed that “Shallow marine refuge” hypothesis could explain the high diversity and high abundance of ostracods of the Permian–Triassic transitional beds. Besides, ostracods showed remarkable geographical differentiation at both regional and global scales during the Permian–Triassic transitional beds and were presumably controlled by geographical isolation.

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