1Hebei International Joint Research Center for Ancient Human Morphology and Evolution, Shijiazhuang 050031, China.
2Faculty of Earth Sciences, Hebei GEO University, Shijiazhuang 050031, China.
3University of Chinese Academy of Sciences, Beijing 100049, China.
*Corresponding author: jianghx@hgu.edu.cn
Abstract
Foraminifera fossils, including 13 genus, 19 species (8 undetermined species), are described from the Frasnian-Famennian (F-F) boundary section at Zhongnancun of Guilin. The single-chambered foraminiferans include ten species: Cribrosphaeroides parasimplex, C. robusta, Archaesphaera giganta, A. crassa, Parathurammina horrida, P. sp., Paracaligella antropovi, P. sp., Bisphaera sp., Irregularina sp. The dual-chambered foraminiferans include Eovolutina elementa and Earlandia sp. The multiple chambered foraminiferans include 7 species, such as Nanicella sp., Septabrunsiina donica, Paratikhinella cannula, Tikhinella measpis, T. sp., Nodosinella cf. evlanensis, and N. sp. The foraminiferans can be classified into four assemblages: the first assemblage dominated by the elements of Parathuramminidae; the second dominated by the elements of Nodosinellidae; the third dominated by the elements of Parathuramminidae and Caligellidae, and the fourth dominated by the elements of Parathuramminidae. The extinction rate of foraminiferans in this section across the F-F event horizon is 7-12%, while the extinction rate below the F-F event horizon is 22%, indicating that the F-F event did not cause a mass extinction in the foraminiferans.
Key words: Foraminiferans, Late Devonian, Frasnian-Famennian event, mass extinction, Guilin.
Funding This study was supported by the key Program of the National Natural Science Foundation of China through grant 42330203 to Dai-Zhao Chen.
Cite it as: Wu, et al. 2026. Foraminiferans from the Late Devonian Frasnian-Famennian (F-F) boundary section at Zhongnancun of Guilin, Guangxi province, South China. . Biopetrology, 6(1): 1-33. http://biopetrology.com/fftldf