Skip to main content
Dryad logo

Data from: Conodont faunas across the Kasimovian–Gzhelian boundary (Late Pennsylvanian) in South China and implications for the selection of the stratotype for the base of the global Gzhelian Stage

Citation

Qi, Yuping et al. (2020), Data from: Conodont faunas across the Kasimovian–Gzhelian boundary (Late Pennsylvanian) in South China and implications for the selection of the stratotype for the base of the global Gzhelian Stage, Dryad, Dataset, https://doi.org/10.5061/dryad.0828sr3

Abstract

The upper Pennsylvanian Naqing and Narao carbonate successions were deposited in intra-platform slope to basinal settings across the Kasimovian-Gzhelian boundary in Guizhou, South China. Conodont faunas comprise a mixture of the endemic taxa of the Idiognathodus luodianensis group and cosmopolitan species of the I. simulator group. The I. luodianensis group includes the new species I. fengtingensis, I. luodianensis, I. naqingensis and I. naraoensis. Platform landmark analysis demonstrates that the species of the I. luodianensis group differ in morphological features from co-occurring species of the I. simulator group. Both groups display similar increasing asymmetry in P1 element pairs across the Kasimovian-Gzhelian boundary, as recognized on the basis of the first occurrence of I. simulator. Many Kasimovian Idiognathodus species disappear and several Gzhelian species first appear with I. simulator, including two new species of Streptognathodus, S. nemyrovskae and S. zhihaoi. Just below the base of the Gzhelian, carbonate δ13C falls from 4‰ to 2‰ in both sections. The combination of an abrupt faunal turnover immediately above the prominent negative δ13C excursion might represent an oceanic event in South China, maybe recognizable on a global scale. One of these two South China sections may be the best location to place the GSSP for the base of the Gzhelian Stage.

Usage Notes

Funding

National Natural Science Foundation of China, Award: 41372023

National Natural Science Foundation of China, Award: 41630101

National Natural Science Foundation of China, Award: 41290260

China Geological Survey, Award: DD20179332

Location

Luodian
China
Guizhou