广西南部二叠纪长兴期放射虫动物群(英文)

RADIOLARIANS FROM THE UPPERMOST PERMIAN CHANGHSINGIAN OF SOUTHERN GUANGXI

广西南宁南部柳桥地区的长兴组上部硅质岩中保存着精美的长兴期晚期放射虫动物群 ,共有 2 4属 3 9种 ,其中 3个新种 ,其中以 L atentifistularia最为常见 ,其次是 Albaillellidae和 Entactiniidae,属于二叠纪晚期的 N eoal-baillella optima组合。伴生生物有有孔虫、海绵骨针、腕足动物等。多数属种在接近二叠纪 -三叠纪界线附近消失 。

A well preserved late Changhsingian Radiolarian assemblage has been discovered from a carbonate siliceous series of the Changhsing Formation in Liuqiao area, Guangxi, South China. They are composed of rich and varied species containing very common Latentifistularia, and common Albaillellidae, Entactiniidae,3 species are new. It belongs to latest Permian Neoalbaillella optima biozone. This fauna is associated with Foraminifera, sponge spicules and Brachiopoda et al. Nearly all these assemblages disappeared before the Permian Triassic boundary, however some forms belonging to Triassic genera seem to be already present.