滇西保山地区丁家寨组及其上覆卧牛寺组，前人根据其中（虫筳）类化石定为上石炭统（马平阶），沿用至今。
The Dingjiazhai Formation and its overlying Woniusi Formation in the Baoshanregion were referred to as Upper Carboniferous ( the Maping Stage ) by predecessors .
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