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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium turpinii
Brébisson var. eximium W. et G.S. West

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 [ eximium ]: Cell body (44-59)-62 μm long, (11-14)-17 μm wide; (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species-->> C. sportella; C. vexatum; C. botrytis;

Cosmarium turpinii Brébisson var. eximium W. et G.S. West cell body 65 μm long, 52 μm wide, isthmus 16 μm wide, L/W=1.3, x 640, used waterfield near Karakemi marsh (Yasaka village), Matsuzaki, Omachi city, Nagano Pref., Japan, April 24, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium Cosmarium

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