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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium decoratum
W. et G.S. West var. decoratum

Cosmarium decoratum Species: Cell body medium in size or larger, 65-86 μm long, 51-63 μm wide, L/W=1.25, isthmus 19-32.5 μm wide; semicells pyramidal or trapezoid in shape with flattened apex; cellwall covered with large granules (including apex, c.f. C. pseudomagnificum); many triangular pores present at the center of the semicells (Illustrations of The Japanese Fresh-water Algae, 1977).


Cosmarium decoratum W. et G.S. West, cell body 64 μm long, 50 μm wide, isthmus about 20 μm wide, x 640, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium decoratum Cosmarium decoratum Cosmarium decoratum Cosmarium decoratum Cosmarium decoratum Cosmarium decoratum

Images of collecting locality: No.5/6, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii


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