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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium meneghinii
Brébisson ex Ralfs var. meneghinii

Cosmarium meneghinii 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:

Cosmarium meneghinii Brébisson var. meneghinii ?, cell body 24 μm long, 18 μm wide, L/W=1.3, isthmus 6 μm wide, x 640, standing water near Hyoutan-ike (pond), Uba-ga-daira, Nasu town, Tochigi Pref., Japan, July 16, 2006, collected by Eizaburo Tsukii, photo by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium

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