[关键词]
[摘要]
新疆库鲁克塔格地区的奥陶系黑土凹组黑色硅质岩中发现丰富的放射虫动物群，以泡沫虫类球形放射虫最多，不具外刺和具外刺的Inaniguttidae科占优势，及一些分类位置待定的特殊放射虫族群。本文描述该动物群中4个新属 Quasibeothuka , Batoballa , Protosegmentum Tetrasphaera , 10个新种 （ Quasibeothuka fusiforma , Q. ovata ,Q. ellipsoidala ,Q. longi f usi forma ,Q. bithornya ,Batoballa communis ,B. longiovata , Protosegmentum xinjiangensis, Tetrasphaera kuruktagensis ,Beothuka longispini forrna ）。黑土凹组的放射虫动物群拟建立Tetrasphnern kuruktagensis带，下分二个亚带，下部的Protosegmentum xinjiangensis亚带和上部的Quasibeothuka fusiform。亚带。该组的黑色页岩中产Exigraptusclavus带笔石化石，时代为中奥陶世大坪期。该组很可能是一个很好的牛油层。
[Key word]
[Abstract]
A rich radiolarian fauna is discovered in the chert of the Middle Ordovician Heituao Formation in Kuruktag region,Xinjiang. The fauna is characterized by abundant spherical spumellarians,members of Family Inaniguttidae either with or without outer spines,and some particular groups of uncertain affinities. Ten new species assigned to four new genera and one known genus (Quasibeothuka fusiforma,Q. ovata,Q. ellipsoidala,Q. longifusiforma,Q. bithornya,Batoballa communis,B. longiovata,Protosegmentum xinjiangensi...
[中图分类号]
Q915
[基金项目]
中国科学院知识创新工程方向性项目(KZCX2-YW-122);;科技部基础性工作专项(2006FY120300-4)资助
