Studies by Means of LM and EM on a New Species, Cyclotella asterocostata Lin, Xie et Cai
光学显微镜和扫描电镜下的星肋小环藻(新种)的研究

A new diatom species, Cyclotella asterocostata is described in the paper. The species was collected from Miyan Reservoir in Beijing, Tangshan in Hebei, Shanyang in Liaoning, Suzhou in Jiangsu, Guilin in Guangxi. It is characterized by a wide marginal region, with the width of the marginal region about half of the valve radius. There are radiate rows of costa alternate with alveola on the surface of valve central region and marginal one. The species has not an isolated punctum, but has some scattered puncta, on the surface of valve central region.