扬子地台早古生代软舌螺化石记述  

EARLY PALEOZOIC FLATTENED HYOLITHS OF THE YANGTZE PLATFORM

作　　者：钱逸[1] 朱茂炎[1] 蒋志文[2] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]云南省地质矿产厅,昆明650011

出　　处：《微体古生物学报》2000年第4期353-361,T003,T004,共11页Acta Micropalaeontologica Sinica

基　　金：国家重点基础研究发展规划项目!( G2 0 0 0 0 7770 0 );"九五"国家攀登计划专项!(攀 -95-专 -0 1 -2 -3)成果

摘　　要：该文的标本采自云南昆明、晋宁下寒武统筇竹寺组 ,龙陵上寒武统核桃坪组、柳水组和江苏江宁上奥陶统顶部“新开岭层”。文中描述了软舌螺化石 4属 5种 ,1未定种。其中 3新属 3新种 ,再次丰富了早古生代碎屑岩地层中的软舌螺化石 ,对探讨软舌螺类演化进程 ,确定时代 ,进行地层对比均有重要价值。Flattened hyoliths occur in Late Meishucunian and early Chiungchussuan successions on the Yangtze Platform. They are characterized by their large shell, broad divergence angle, and distinct opeculum. Despite diagenetic flattening, the dorsal ventral differentiation is easily recongnizable in these hyoliths. The paper documents 4 genera, three of which are new, and 5 species, four of which are new of hyoliths from Jiangsu and Yunnan Provinces (Yangtze Platform).

关 键 词：软舌螺 早古生代 扬子地台 化石 

分 类 号：Q91[天文地球—古生物学与地层学]