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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium angulosum
Brébisson var. angulosum

Cosmarium angulosum Species [ var. angulosum ]: Cell body small, 14-31 μm long, 12.6-21 μm wide, L/W=1.5, isthmus 3.4-6 μm wide; semicells quadrate or hexagonal in shape.
[ var. concinnum ]: Smaller than var. angulosum, (11-12)-13 μm long, 8-12 μm wide, L/W=1.3, isthmus 2.6-4.5 μm wide (Illustrations of the Fresh-water Algae, 1977).

Cosmarium angulosum Brébisson var. concinnum (Rabenhorst) W. et G.S. West ?, cell body 14 μm long, 11 μm wide, isthmus 2.5 μm wide, x 640, Chiba-Minato Park, Chiba City, Chiba Pref., Japan, July 2003 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 Cosmarium Cosmarium

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