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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium synduorhabdum

Cosmarium synduorhabdum 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: Semicells scalariform or depressed pyramid-shaped with flattened apex; cell body longer than its width, 41-46 μm long, 37-40 μm wide, isthmus 15-17 μm wide; cellwall punctated (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -- >> C. dorsitruncatum; C. trituberculatum;

Cosmarium synduorhabdum Skuja ?, cell body 30 μm long, 26 μm wide, x 400, x 640, Uruguay, November 1999, photo by Yuuji Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium Cosmarium

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