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: Unicells, planktonic; cell body flat, triangular (or qadrangular) in shape; laterally concave, 20-30 μm long; corners tapered into straight or slightly curved spines, 4-6 μm long; cell wall smooth (Photomicrographs of the Freshwater Algae, vol. 1, 1984).

Similar genus -->> Tetraedriella (Xanthophyceae); Goniochloris (Xanthophyceae);

31 μm 63 μm 94 μm; x 640