云南保山地区二叠纪Shanita有孔虫动物群

系统研究了云南保山市卧牛寺附近大凹子组“破灰岩”中的Shanita有孔虫动物群,鉴定出其中特征分子Shanita和Hemigordiopsis8种(包括2新种,不含未定种和比较种),其他非有孔虫10属。研究结果表明,保山地区Shanita动物群的特征属和整体构成与缅甸、泰国和我国西藏等地的Shanita动物群相似,时代为茅口期晚期(冷坞期)至吴家坪期早期。但是,总体属级分异度较低,个别地方性种的出现及共生类的缺失,又使得保山地区的Shanita动物群具有一定的地域色彩。

THE SHANITA FAUNA (PERMIAN FORAMINIFERA) FROM BAOSHAN AREA, WESTERN YUNNAN

The foraminiferal materials described and figured in the present paper were collected from the Permian Da'aozi Formation in Woniusi Section of Baoshan area, western Yunnan. Systematic study shows that the characteristic genera, i.e., Shanita and Hemigordiopsis, of the Shanita fauna in Baoshan area contain 8 species, including 2 new species. Besides, 10 other genera of non-fusulinid foraminifers have also been recognized from the fauna. Further study has revealed that the Shanita fauna in Baoshan area can be correlated to those from Burma, Peninsular Thailand and Tibet with an age of late Maokouan (Lengwuan) to Wuchiapingian. However, the relatively lower generic diversity and occurrence of some endemic species, as well as the absence of fusulinaceans may indicate the regional characteristics of Shanita fauna in Baoshan area.