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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium pseudobinerve
Grönblad

Cosmarium pseudobinerve 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).

Species:
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Cosmarium pseudobinerve Grönblad ?? (lack anterior horizontal incision), cell body 44 μm long, 25 μm wide, L/W=1.8, isthmus 11 μm wide, x 640, Futayo-no-ike (pond) near Haguro mountain, Haguro town, Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium

Images of collecting locality: Futayo-no-ike (pond) near Haguro mountain, Haguro town, Yamagata Pref., Japan, August 3, 2006 by Y. Tsukii


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