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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium repandum
Nordstedt f. minor W. et G.S. West

Cosmarium repandum Genus: Unicellular; variable in shape; a constriction at the center of the cell body; mostly longer than wide; flattened; each semicell hemispherical, spherical, ellipsoidal, rectangular, pyramidal or kidney-shaped; no apical indentation (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:


Cosmarium repandum Nordstedt f. minor W. et G.S. West, cell body 19 μm long, 14.5 μm wide, isthmus 4 μm wide, x 640, Imou bog, Toyohashi city, Aichi Pref., Japan, September 11, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium

Cosmarium repandum Nordstedt f. minor W. et G.S. West, cell body 18 μm long, 15 μm wide, isthmus 5 μm wide, x 640, Imou bog, Toyohashi city, Aichi Pref., Japan, September 11, 2004 by Y. Tsukii
Cosmarium


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