西藏台错晚第四纪轮藻类的新类型  

NEW TYPES OF THE LATE QUATERNARY CHAROPHYTES FROM TAICUO,TIBET,CHINA

作　　者：刘俊英[1,2,3] 王海雷[1,2,4] 

机构地区：[1]国土资源部盐湖资源与环境重点实验室,北京100037 [2]中国地质科学院盐湖与热水资源研究中心,北京100037 [3]中国地质科学院地质研究所,北京100037 [4]中国地质科学院矿产资源研究所,北京100037

出　　处：《微体古生物学报》2011年第2期145-168,共24页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金重点项目(编号40531002);国家大地调项目(121201081805;1212010818057)资助成果

摘　　要：本文的研究材料来自西藏羌塘高原西部台错古湖一个3.69 m的天然剖面,其地层测年为32.6—4.5ka。从其156个样品中获取大量的轮藻类、介形类和腹足类及少量有孔虫等微体化石。据轮藻类藏卵器外形,顶部结构、螺旋细胞钙化式样等特征,该剖面的轮藻类应归属于轮藻科Characeae之轮藻属Chara。经研究得知,台错古湖在大约28 ka的时期内,曾生长过22种轮藻,其中新类型7个,包括新种4个:Chara platea,Ch.gemma,Ch.subnana和Ch.taicuoensis;新型2个:Charalatispiralisf.stipitata,Ch.specialisf.major;新变种1个:Characonvexvar.zangbeiensis。其余是曾产于国内外第四系的Chara其它分子。其中有5个新联合种:Chara alba(Madler et Staesche),Ch.daqaidamensis(Tang et Di),Ch.quanjiensis(Tang et Di),Ch.longistipitata(Tang etDi)和Ch.tartensis。该剖面轮藻类、介形类、腹足类等多门类微体化石的紧密共生,对轮藻植物群生态学研究具重要意义。The materials in this paper come from a natural section of 3.69 m depth and 32.6—4.5 ka B.P.in the Taicuo ancient lake,western Qiangtang Plateau,Tibet.From 156 samples obtained there abundant microfossils have been found such as charophyte,ostracod,gastropod and foraminifera.Based on the shape,apical structure and spiral calcification of the gyrogonites,the charophytes from the section all belong to Chara.During a period of 28 ka in the Taicuo ancient lake there occurred 22 species of charophytes among which are 8 new types including 4 new species： Chara platea,Ch.gemma,Ch.subnana and Ch.taicuoensis and one variety： Chara convex var.zangbeiensis.The rest are Quaternary Chara members seen worldwide,including 5 new combination species： Chara alba（Mdler et Staesche）,Ch.daqaidamensis,Ch.quanjiensis,Ch.longistipitata and Ch.tartensis.The multi-kind microfossils such as charophyte,ostracod and gastropod closely coexist there,which shows important significance in the ecological study of the charophyte flora.

关 键 词：轮藻类 新类型 晚第四纪 台错 西藏 

分 类 号：Q913.84[天文地球—古生物学与地层学]