Genus: Cell body short, radiate in shape; apical view of the cell, triangular, polygonal,
ellipsoidal or spindle-shaped; zygospores formed outside of mother cells
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Unicellular, planktonic; cell body flat, quadrangular in shape,
four sides depressed and four corners with small papillae; a single chloroplast plate-like, with a pyrenoid
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
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