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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium pandriforme
Turner

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

Cosmarium pseudopyramidatum Lundell var. pseudopyramidatum, cell body μm long, μm wide, L/W=, isthmus μm wide, x 640, Wetland II, Kashibaru marsh, Karatsu city, Saga Pref., Japan, September 9, 2008 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium pseudopyramidatum Cosmarium pseudopyramidatum Cosmarium pseudopyramidatum
Cell body μm long, μm wide, L/W=, isthmus μm wide, x 640
Cosmarium pseudopyramidatum Cosmarium pseudopyramidatum

Images of collecting locality: Wetland II, Kashibaru marsh, Karatsu city, Saga Pref., Japan, September 9, 2008 by Y. Tsukii

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