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Gamophyceae: Zygnematales: Desmidiaceae

 Staurastrum dickiei
Ralfs var. dickiei
= Staurodesmus dickiei (Ralfs) Lillieroth 1950

Staurastrum dickiei Subgenus [ Prostaurastrum ]: lacks arm-like projections (Illustrations of The Japanese Fresh-water Algae, 1977)
Species [ var. dickiei ]: Cell body (28-34)-44 μm long (excluding spines), (30-34)-44 μm wide, L/W=1.0, isthmus 7-9 μm wide; semicells nearly elliptical, upper margin more covex than lower margin; each corner with a spine projecting downward; apical view triangular in shape with each side concave.
[ var. circulare ]:
[ var. latum ]: (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> Arthrodesmus convergens (side view only);

Staurastrum dickiei Ralfs var. dickiei, cell body 31 μm long, 32 μm wide, L/W=1.0, isthmus 10 μm wide, x 640, Onnenai, Kushiro marsh, Kushiro city, Hokkaido, Japan, October 16, 2005 by Y. Tsukii
Arthrodesmus 31 μm Arthrodesmus 63 μm Arthrodesmus 94 μm; x 640
Staurastrum Staurastrum Staurastrum

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