Protoraphis hustedtiana var. nana Takano, a newly recorded araphid diatom in China

This study reports a newly recorded araphid diatom, Protoraphis hustedtiana var. nana Takano, from Weizhou Island, China. This variety was found epiphytic on Sargassum spp. Its morphology was examined in detail using light and scanning electron microscopy, and its ecological habitat and geographical distribution were documented.