【摘要】 贵州罗甸云干地区二叠系生物礁岩发育,尤其在云干地区出露丰富的、保存完好的造礁海绵化石,笔者初步野外观察和采样后将剖面划为A、B、C、D四段,由下至上分别为含有孔虫泥晶海绵骨架岩、泥晶海绵骨架岩、亮晶海绵骨架岩和含叶状藻海绵障积岩。初步共鉴定出纤维海绵纲下4科6个属和房室海绵纲下8科11属;其中,发现的雷妮亚科Leiniidae的雷妮亚属Leinia,为国内首次发现报道,本文对其进行了详细描述。另通过对造礁海绵房室海绵属统计,将本礁和贵州紫云、广西隆林的二叠世生物礁进行房室海绵相同属重现率进行计算比较,发现本礁和紫云礁重现率更高,说明他们的造礁生物群团相关性更加密切,群落结构相似度更高。更多还原

【Abstract】 There are lots of Paleozoic reefs outcrop in South China,especially in Yungan Guizhou Province well. Base on the lithofacies and fossils,we subdivided the section into A、B、C and D four sectors,Sector A and B are micrite framestone sponge fossils are abundant,sector C is sparry framestone and sector D is Bafflestone and diversity fossils of sponges is poorest. We have identified 6 genus in 4 Families of Inozoa,11 genus in 8 Families of Sphinctozoa.Especially Its Leinidiiae Leinia’s first show in South China. To Study ecosystem,we analyse Sphinctozoan’genus reappearance ratio between Ziyun reef and Longlin reef,found that value of reappearance ratio between Yungan and Zinyun is higher than Yungan and Longlin which indicate than the former set’s ecosystem is more similar than later set.更多还原