Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum punctulatum
(Brébisson) Ralfs 1848

Species: Cell body 24-40.5 μm long, 21-36.5 μm wide, isthmus 8.4-16 μm; semicells slightly twisted with each other; apical view triangular with each margin slightly convexed; side view elliptical diamond-shaped; cell wall covered with granules regularly arranged around each arm (Illustrations of The Japanese Fresh-water Algae, 1977).
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Staurastrum punctulatum
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