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:
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Staurastrum sp, x400, x 640, by Y Tsukii
Staurastrum pseudosebaldi var simplicius W West: Body with arms 322 μm long, 51-52 μm wide, constriction 86 μm wide; body length slightly shorter than width; arm-like projections of hemicells short, 3 spines at each terminal; small spines aligned at apex; 3 spines at terminal of the arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)