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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium ralfsii
Brébisson in Ralfs var. montanum Raciborski

Cosmarium ralfsii 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 [ var. montanum ]: (Illustrations of The Japanese Fresh-water Algae, 1977).

Cosmarium ralfsii Brébisson var. montanum Raciborski, cell body 74 μm long, 67 μm wide, isthmus 32 μm wide, x 640, Kabuto-yama sizen-kansatsu ike (pond), Kabuto-yama, Nishi-no-miya city, Hyogo Pref., Japan, September 10, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium Cosmarium
Cosmarium Cosmarium Cosmarium

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