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A new species of Neidium (Bacillariophyceae) and a checklist of the genus from China

A new species, Neidium limuae Liu & Kociolek, is described from Limu Mountain, which is located in the middle part of the Hainan Province, China. The valves of this new species have a distinct linear outline with rostrate apices. The areolae forming the striae are externally covered by volate projections that show a reticulated design. These occluding projections may be branched, bifurcate or T-shaped. A detailed description of this new species is presented, based on light and scanning electron microscope observations. This is the first report of the genus Neidium Pfitzer from this Chinese province. A short review of research studies on Neidium in China complements this study, and a checklist of Neidium taxa previously reported from China is given.