中国科学院南京地质古生物研究所机构知识库

The uppermost 5-15 m of the Douling Formation ill the southern Hunan area. South China. yields a diverse fauna comprised of ammonoids, bivalves, and brachiopods. The brachiopods reported in this paper consist of 51 species in 34 genera and are dominated by the Lopingian (Late Permian) species associated with a few species persisting front file Underlying Maokouan (Late Guadalupian). This fauna is of earliest Wuchiapingian in age as precisely constrained by the associated conodont Clarkina postbitteri postbitteri and the Guadalupian-type ammonoid fauna of the Roadoceras-Doolingoceras Zone in the brachiopod horizon. The discovery of the Lopingian species-dominated brachiopod fauna ill the earliest Wuchiapingian ill southern Human suggests a much less pronounced effect of the pre-Lopingian crisis (end Guadalupian niass extinction) than the end-Charighsingian niass extinction in terms of brachiopods, it contemporaneous onset of the Lopingian recovery/radiation during the pre-Lopingian crisis period, and taxonomic selectivity of the pre-Lopingian crisis in terms of-different fossil groups. New taxa are Echinauris doulingensis n. sp. Pararigbyella quadrilobata n. gen. and n. sp. and P. doulingensis it. gen. and n. sp.