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Nitzschia shanxiensis nom.nov.,stat.nov.,described originally from Hunan Province,China as N.sinuata var.constricta Chen & Zhu,was observed from Shanxi and Guizhou Provinces.The morphology of N.shanxiensis is documented by light(LM)and scanning electron microscopy(SEM)and discussed in detail,including a comparison with the other similar species in the genus Nitzschia,especially the Grunowiae group.