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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium norimbergense
Reinsch var. norimbergense

Cosmarium norimbergense 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
Subgenus [Eucosmarium]: Cell body dorso-ventrally compressed, with strong constriction at the center, transverse section elliptical or diamond-shaped.
Section [Quadratiformes]: Cell surface smooth; semicells rectangular (Illustrations of The Japanese Fresh-water Algae, 1977).

Similar species --> > C. succisum;

Cosmarium norimbergense Reinsch var. norimbergense, cell body 17 μm long, 14 μm wide, constriction 5.5 μm wide, x 400, x 640, Kurihashi, Saitama Pref., Japan, July 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium

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