中文摘要：

对大兴安岭硅藻进行了形态分类学研究,发现了部分中国新记录属及中国新记录种。研究共报道大兴安岭硅藻10属10种,对这些属、种的形态学特征进行了详细的描述,并提供了图片资料。其中3个属为中国新记录属,分别为：北方藻属Boreozonacola Lange-Bertalot、Kulikovskiy ＆ Witkowski、矮羽纹藻属Chamaepinnularia Lange-Bertalot ＆ Krammer、微肋藻属Microcostatus Johansen ＆ Sray。本文给出其余7个属的详细特征描述,为其他相关研究提供参考。观察到中国新记录种9种1变种,分别为：胡斯特北方藻Boreozonacola hustedtii Lange-Bertalot,Kulikovskiy ＆ Witkowski、海塞矮羽纹藻Chamaepinnularia hassiaca（Krasske）Cantonati ＆ Lange-Bertalot、墙生微肋藻Microcostatus maceria（Schimanski）Lange-Bertalot、异辐节卡维藻Cavinula heterostauron（Germain）Van de Vijver、类印加等列藻Diadesmis ingeaeformis Hamilton ＆ Antoniades、沼地盖斯勒藻Geissleria paludosa（Hustedt）Lange-Bertalot ＆ Metzeltin、忽视蹄形藻Hippodonta neglecta Lange-Bertalot,Metzeltin ＆ Witkowski、沙拉泥生藻Luticola charlatii（Peragallo）Metzeltin,LangeBertalot、原子麦尔藻特许变种Mayamaea atomus var.permitis（Hustedt）Lange-Bertalot、莱维迪细篦藻Neidiopsis levanderi（Hustedt）Lange-Bertalot ＆ Metzeltin。

英文摘要：

The diatom from Great Xing’an Mountains were studied following the new classical system of the interna-tional diatom research. During the study, many new record genera and species were observed. In this paper, 10 taxa be-long to 10 genera were reported and the detail morphological characters were given. Among them, 3 genera were newly recorded genera in China, they are： Boreozonacola Lange-Bertalot, Kulikovskiy ＆ Witkowski, Chamaepinnularia Lange-Bertalot ＆ Krammer and Microcostatus Johansen ＆ Sray. Another 7 genera were reported in China before, but the morphological characters were not given by the former studies, in this paper, morphological descriptions of these 7 genera were given to provide basic informations for other studies. Nine newly recorded species and 1 variety were ob-served, they are： Boreozonacola hustedtii Lange-Bertalot, Kulikovskiy ＆ Witkowski, Chamaepinnularia hassiaca （Krasske） Cantonati ＆ Lange-Bertalot, Microcostatus maceria （Schimanski） Lange-Bertalot, Cavinula heterostauron （Germain） Van de Vijver, Diadesmis ingeaeformis Hamilton ＆ Antoniades, Geissleria paludosa （Hustedt） Lange-Bertalo ＆ Metzeltin, Hippodonta neglecta Lange-Bertalot, Metzeltin ＆ Witkowski, Luticola charlatii （Peragallo） Metzeltin, Lange-Bertalot, Mayamaea atomus var. permitis （Hustedt） Lange-Bertalot, Neidiopsis levanderi （Hustedt） Lange-Bertalot ＆ Metzeltin.