LATE ORDOVICIAN TABULATE CORALS FROM XINJIANG AND NINGXIA
Abstract:The materials described here were collected from the Upper Ordovician (Ashgill Stage), the Bulongor Formation in Hobuksar County of the Xinjiang Uighur Autonomous Region and the Beiguoshan Formation in Guyuan County of the Ningxia Hui Autonomous Region by Cao Xuanduo and Huang Hongping in 1983.In this paper the writers have described thirteen genera and twenty species and subspecies. Among them three genera and nineteen species and subspecies are new.