Gamophyceae: Zygnematales: Desmidiaceae

Staurastrum punctulatum
[Brébisson] Ralfs

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 [Brébisson] Ralfs var. punctulatum (or var. subproductum W. et G.S. West ?), cell body 36 μm long, 32 μm wide, isthmus 11 μm wide, x 640, Omoi river, Oyama city, Tochigi Pref., Japan, February 8, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Staurastrum punctulatum Staurastrum punctulatum Staurastrum punctulatum


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