Four Newly Recorded Species of Surirellaceae(Bacillariophyta) in China

Four species of Surirellaceae(Bacillariophyta) are first reported in China from Xinjiang and Yunnan Province in this paper,specifically Cymatopleura cochlea Brun,Surirella visurgis Hustedt,Campylodiscus clypeus Ehrenberg and Campylodiscus levanderi Hustedt.The taxonomic characters,light microscopy(LM)and scanning electron microscopy(SEM)photos and ecological affinities were described for each taxon.