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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium sikhimense
Turner

Cosmarium turpinii 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:
Similar species-->> C. sportella; C. vexatum; C. botrytis;

Cosmarium sikhimense Turner (or C. reniforme var. elevatum W. et G.S. West ?), cell body 46 μm long, 31 μm wide, L/W=1.5, x 640, Koigakubo marsh, Tessei-cho, Okayama Pref., Japan, November 22, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium Cosmarium

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