Systematics and palaeoecology of fossil plants from the Upper Permian Longtan Formation in western Guizhou Province, southwestern China

End Permian to Middle Triassic plant species richness and abundance patterns in South China: Coevolution of plants and the environment through the Permian–Triassic transition

“…1) from the Longtan Formation and lower Xuanwei Formation is of Wuchiapingian age (Li et al, 1995). It belongs to the Cathaysian (Gigantopteris) flora which steadily become more diverse and widespread during Wuchiapingian Stage (Li, 1997;Luo et al, 2021). In addition to southeastern parts of South China, the Cathaysian (Gigantopteris) flora spread to the west of the Yangtze massif including the Xizang (Tibet) and Qinghai areas in the Wuchiapingian.…”

New genus of Ignotalidae (Cicadomorpha) with notes on other Homoptera from the Permian and Triassic of the Tunguska Basin

“…brimis Lin, 1982 lived at 14°N paleolatitude (paleocoordinates from the Paleobiology Database [2022]) in the Late Permian tropics of Cathaysia, on the South China microcontinent amidst the warm ocean. The Late Permian Cathaysian flora of South China, which flourished in warm and humid conditions after the Emeishan Traps eruption, disappeared during the end-Permian mass extinction [Luo et al, 2021], but served as the main source of the Korvunchana flora [Dobruskina, 1994]. The Rhipiscytina species from the Tunguska Basin lived at 55°N paleolatitude in the Early Triassic semiarid zone (see Romano et al [2020]), amidst the Pangaea supercontinent, at least a thousand km from any sea.…”

Fine-Grained Lithofacies Types and Sedimentary Model of the Upper Permian Longtan Formation Coal Measures in the Western Guizhou Region, South China

“…The Longtan Formation in western Guizhou is a marine–continental transitional sedimentary environment of lagoon-tidal flat and deltaic sedimentary facies. − The area has high organic matter content, mainly type III kerogen, and has a good material basis for shale gas enrichment, ,,, with high gas production potential. , Six types of mudstone facies have been identified in the Longtan Formation in western Guizhou, including carbonaceous mudstone, siliceous-clay mixed mudstone, argillaceous mudstone, silty shale, muddy siltstone, and calcareous-clay mixed shale . Previous scholars classified the Longtan Formation shale in the Sichuan Basin and its surrounding areas based on its mineral content and organic matter abundance. ,, The facies classification of marine shale is relatively mature, − but in the marine–continental transitional environment, shale rich in organic matter has not been sufficiently studied for facies classification and targeted research.…”