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Chlorophyta: Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum punctulatum

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).

Staurastrum punctulatum, tape No. 0040, time code 0828, cell body 33 μm long, 31 μm wide, Hiroshima University, Hiroshima city, Hiroshima Pref. Japan, September 28, 1998 by Y. Tsukii

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