贵州紫云晒瓦群中放射虫Neoalbaillella动物群的发现

DISCOVERY OF THE NEOALBAILLELLA RADIOLARIAN FAUNA IN THE SHAIWA GROUP OF ZIYUN DISTRICT, GUIZHOU

首次报道贵州紫云晚二叠世晒瓦群顶部硅质岩中 N eoalbaillella动物群 ,计 12种 ,5未定种 ,归属于 12属 9科 4超科 2亚目 ,其中 1新属 (Spongosp haeradiscus gen.nov.) ,2新种 (Spongosphaeradiscusshaiwaensis sp.nov.和Copicyntra shaiwaensis sp.nov.)。根据这个动物群建立 N eoalbaillella ornithoformis- Spongosphaeradiscusshaiwaen-sis带 ,与东亚和美国西海岸长兴期的 N eoalbaillella ornithoformis带对比。

The Neoalbaillella fauna firstly reported in this paper is found in the cherts of the uppermost part of the Late Permian Shaiwa group in Ziyun District, Guizhou, including 12 species, 5 undetermined species and 12 genera which are grouped in 9 families of 4 superfamilies, of which one genus ( Spongosphaeradiscus ) and two species ( Spongosphaeradiscus shaiwaensis and Copicyntra shaiwaensis ) are new. This radiolarian fauna is represented by the Neoalbaillella ornithoformis Spongosphaeradiscus shaiwaensis assemblage which may be correlated to the Neoalbaillella ornithoformis Zone of the Changhsingian Stage in East Asia and west coast of America.