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: with arm-like projections
(Illustrations of The Japanese Fresh-water Algae, 1977)
Species [var. iotanum]:
Cell body with 3 arm-like projections,
11 μm long (excluding arms), 18-22 μm long (including arms),
9.8 μm wide (excluding arms), 18-22 μm wide (including arms),
isthmus 4-5 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977)
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