内蒙古巴丹吉林沙漠东南部湖泊底质中现代介形类

RECENT OSTRACODA FROM LAKE SEDIMENTS OF THE BADAIN JARAN DESERT IN INNER MONGOLIA,NORTHWESTERN CHINA

本文对我国内蒙古西部巴丹吉林沙漠地区37个湖泊底泥样进行分析、鉴定,共鉴定出介形类6属7种(含一个未定种):意外湖花介(Limnocythere inopinata)、喜盐异星介(Heterocypris salina)、脆弱大带星介(Megazonocypris fragilis)、疏忽玻璃介(Candona neglecta)、纯净小玻璃介(Candoniella albicans)、近球形金星介比较种(Cypris cf.subglobosa)、金星介未定种(Cypris sp.)。其中L.inopinata是该地区的优势种,并且具有不同表型特征的个体均有存在,分析认为盐度的变化并不是影响其壳饰发育的唯一因素。

In this study,37 samples from the lakes of the Badain Jaran desert were processed,and 7 ostracod species（including 1 indeterminate species）belonging to 6 genera are reported.They are Limnocythere inopinata（Baird,1843）,Heterocypris salina（Brady,1968）,Megazonocypris fragilis（Huang 1979）,Candona neglecta（Sars,1887）,Candoniella albicans（Brady,1864）,Cypris cf.subglobosa Sowerby and Cypris sp..L.inopinatais the dominant species,and individuals with unnoded,1 to 3 node or 1 carina in this region,which suggests that the change of salinity may not be the unique factor affecting the occurrence of different phenotypes.