中文摘要：

报道了对齿藓属中国新记录种——无疣对齿藓（Didymodon validus Limpr.）（新拟）。该种主要分布于欧洲和中亚。该种的主要特征为叶干燥时内卷或背弯,叶片较长,中肋突出叶尖呈长毛尖,叶细胞平滑无疣。该研究对无疣对齿藓的形态特征、地理分布进行了详细描述,将其与属内相似种进行了比较分析,并提供了该种的显微照片和形态线描图。

英文摘要：

This paper reported one of China＇s new recorded species（Didymodon validus Limpr.）in Didymodon.The moss was distributed in Europe and Central Asia.The characteristics of the D.validus Limpr.：it is twisted or incurved when dry;leaf is longer;Costa wide at leaf apex,long-excurrent;Leaf cells smooth and without warts.In this paper,the taxonomic features,habitat,geographical distribution and characteristic comparison of related species are described.Meanwhile,ink drawing of the new recorded species was made.