湖南晚二叠世生物礁主要造架生物纤维海绵的研究

INOZOAN,MAJOR REEF FRAME-BUILDING ORGANISMS IN LATE PERMIAN, HUNAN

杨志远 柳祖汉

Yang Zhiyuan Liu Zuhan

湖南晚二叠世生物礁是发育在湖南郴县、桂阳及晨溪等地一系列的点礁。对8条生物礁组合实测剖面中大量礁生物化石标本的研究发现,生物礁中造架生物主要是钙质海绵。根据主要造架生物之一的纤维海绵研究历史和分类,采用以排水沟道作为鉴定依据的最新分类,对生物礁中纤维海绵进行了系统研究。研究发现,纤维海绵有8属12种,其中新种1个,为小双管海绵新种(,sp.nov.);比较种1个,为平行粗管海绵比较种( cf.);未定种1个,为广西海绵未定种( sp.)。

The late Permian reefs are distributed in Chengxian, Guiyang and Chenxi Counties in southern Hunan province. Reefs in Bangxian and Guiyang are patch reefs developed along Chengru shallow sea. Reefs in Chenxi are bioherms, undeveloped patch reefs. The reefs in both sites occur in the late Permian Changxing Formation. A lot of samples of fossils and rocks have been collected while surveying 8 reef composite sections in southern Hunan. We find that the most important frame-building organisms are calcisponges, just as other Permian reefs in southern China. By systematically researching Inozoans, one of the important frame-building calcisponges, it is thought that the water system and fibres might be important evidence in classification. Twelve species and 8 genera of Inozoans including one new species, one comparative species and one undefined species are found, and some species are newly classified.

10.11743/ogg20030117