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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium elegantissimum
f. minor W. et G.S. West

Cosmarium elegantissimum 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 elegantissimum f. minor W. et G.S. West, ( or C. amoenum Brébisson var. amoenum ?), cell body 61 μm long, 26 μm wide, isthmus 21 μm wide, x 640, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, May 8, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium elegantissimum Cosmarium elegantissimum

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