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)
Subgenus: lacks arm-like projections
(Illustrations of The Japanese Fresh-water Algae, 1977)
Species: Cell body small, (22.4-25)-30 μm long, (28)-34 μm wide,
L/W=1, isthmus 5-(7.8-9) μm wide; semicells elliptical or triangular in side view,
apex slightly convex, laterally strongly convex; dichotomous projections at each corner;
apical view triangular (Illustrations of The Japanese Fresh-water Algae, 1977)
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