Four new species of Lordiphosa denticeps species-group are reported from Yunnan,China,namely Lordiphosa gruicollara sp.nov.,Lordiphosa eminens sp.nov.,Lordiphosa incidens sp.nov.and Lordiphosa piliferous sp.nov.The distribution of the species of denticeps species-group shows distinct geographical replacement.%概述了拱背果蝇属(Lordiphosa)中双齿拱背果蝇种组(denticeps species-group)的分类状况,并记述了分布在云南省的4个新种,即鹤颈拱背果蝇(Lordiphosa gruicollara sp.nov.),突拱背果蝇(Lordiphosa eminens sp.nov.),凹缘拱背果蝇(Lordiphosa incidens sp.nov.)和具毛拱背果蝇(Lordiphosa piliferous sp.nov.).对目前在云南发现的该种组10个物种的地理分布做了初步分析,结果显示其分布呈明显的地理替代.模式标本均藏于北京大学生命科学学院.
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