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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium circulare
Reinsch var. circulare

Cosmarium circulare Species [ var. circulare ]: Cell body large, nearly circular or slightly broad elliptical in shape, (51-75)-95 μm long, 48-90 μm wide, isthmus 20-(22-28)-34 &3956;m wide; semicells semicircular, basal corner rounded, side view ovoid or nearly circular, apical view elongated elliptical; cell wall covered with small dots; chloroplasts with 2 pyrenoids.
[ f. minor ]: Cell body 33-35-(40) μm long, 35-(47) μm wide, isthmus 12-14-(17) μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).


Cosmarium circulare f. minor W. et G.S. West ??, cell body 43 μm long, 49 μm wide, L/W=0.9, isthmus 23 μm wide, x 640, Tane-ike (pond), Togakushi highland, Shinano town, Nagano Pref., Japan, June 12, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium circulare Cosmarium circulare Cosmarium circulare Cosmarium circulare


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