贵州松林下寒武统牛蹄塘生物群中的球状海绵化石  

Globular Sponge Fossils from the Lower Cambrian in Songlin, Guizhou Province, China

作　　者：赵元龙[1] 杨荣军[1] 杨兴莲[1] 毛永琴[1] 

机构地区：[1]贵州大学资环学院古生物及生物成矿研究所,贵阳550003

出　　处：《高校地质学报》2006年第1期106-110,共5页Geological Journal of China Universities

基　　金：国家自然科学基金(40162002;40232020;40372023);贵州省重点基础研究基金(黔基合计字2002309);科技部重大基础项目前期专项项目(2002.CCC02600)资助项目

摘　　要：贵州遵义松林牛蹄塘生物群含球形海绵2个属,即麦粒海绵Triticispongia(MehletReitner),1993和鬃毛状海绵Saetaspongia(MehletReitner),1993。描述了产自松林中南村黑沙坡牛蹄塘组下部的牛蹄塘生物群中球状海绵化石的2个种,即Triticispongiadiagonata(MehletReitner),1993及Saetaspongiadensa(MehletReitiner),1993,丰富了这两属种的特征和分布资料。The Niutitang Biota from the lower Cambrian in Songlin Town, Zunyi County, Guizhou Province, southwestern China is dominated by sponges and represents early radiation of sponges in early Cambrian. Two common sponge genera were found in the lower horizon of the Niutitang Boita. They are Triticispongia （ Mehl et Reinter）, 1993 and Saetaspongia （ Mehl et Reinter）, 1993. Body wall of the former is composed of two kinds of stauractin of different sizes, which are mainly in diagonal arrangement. The body wall of the latter is composed of dense accumulations of hairlike diactines. Spicules in these two genera do not protrude out of body wall. Sponge body of both genera hardly exceeds 10 cm in size. They belong to Hexactinellida. Both genera were firstly found in black shale of the lower part of the Niutitang Formation, Sancha Town, Dayong, Hunan Province, and then in the Niutitang Formation in Zunyi, Guizhou Province.

关 键 词：下寒武统 牛蹄塘生物群 斜针麦粒海绵Triticispongia diagonata 密集鬃毛状海绵 Saetaspongia densa 

分 类 号：G915.812[文化科学]