滇东北大关地区志留纪兰多维列世晚期(Telychian期)的四射珊瑚动物群  

EARLY SILURIAN (TELYCHIAN) RUGOSE CORAL FAUNA OF DAGUAN AREA,NORTHEAST YUNNAN

作　　者：陈建强[1] 何心一[1] 唐兰[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《古生物学报》2005年第2期229-246,共18页Acta Palaeontologica Sinica

基　　金：教育部高等学校博士学科点专项科研基金(20010491005);国家重点基础研究发展规划项目(G2000077700)资助成果之一

摘　　要：对大关地区的Telychian期嘶风崖组和大路寨组的四射珊瑚进行详细研究。嘶风崖组计有四射珊瑚18属34种,大路寨组计有四射珊瑚9属10种。描述四射珊瑚12 属19 种,其中1 新属, 5 新种,分别是:Protoketo phyllum daguanense gen. et sp. nov., Crassilasma huanggexiense sp. nov., Pseudophaulactis heae sp. nov., P.convolutus sp. nov., Shensiphyllum minor sp. nov.。论述了嘶风崖组和大路寨组四射珊瑚动物群特征及其地质意义,尤其是嘶风崖组的四射珊瑚代表了上扬子区Telychian早期的四射珊瑚动物群,完善了上扬子区志留纪兰多维列世四射珊瑚的序列和对研究该阶段四射珊瑚辐射期的进一步分析具有重要意义。The late Early Silurian(Telychian) rugose coral fauna from Daguan area, northeast Yunnan is studied by the present authors.The Lower Silurian Series in the Daguan region may be divided into the following units: Overlying strata: Lower Devonian Cuifengshan Formation Disconformity Telychian-Rhuddanian, Lower Silurian: Caitianwan Formation(mid-late Telychian) Daluzhai Formation(mid-late Telychian) Sifengya Formation (early Telychian) Huanggexi Formation(mid-late Aeronian) Longmaxi Formation(Rhuddanian-early Aeronian) Conformity Upper Ordovician: Guanyinqiao Formation Wufeng Formation In the Huanggexi Formation rugose corals are scarce, but the Sifengya Formation (early Telychian) yields numerous rugosans. Up to now, 18 genera and 34 species are reported in the Sifengya Formation, while the Daluzhai Formation merely contains rugosans including 9 genera and 11 species (Table Ⅰ). Altogether 19 species assigned to 12 genera are described in this paper, among them, 1 genus and 5 species are new. They are: Protoketophyllum daguanense gen. et sp. nov., Crassilasma huanggexiense sp.nov., Pseudophaulactis heae sp. nov., P. convolutus sp. nov. and Shensiphyllum minor sp. nov.In addition, the coral fauna characters of the Sifengya and Duluzhai formations are briefly discussed.

关 键 词：珊瑚动物群 志留纪 多维 滇东北 四射珊瑚 晚期 上扬子区 sp. 地质意义 

分 类 号：Q915.2[天文地球—古生物学与地层学]