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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium subauriculatum
W. et G.S. West var. subauriculatum
Cosmarium subauriculatum 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[ subauriculatum ]: Cell body 43-46-(49-51) μm long, 43-44-(45-47) μm wide, isthmus 21-25-(28-30) μm wide; (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -- >> C. ralfsii; C. auriculatum;
Cosmarium subauriculatum W. et G.S. West var. subauriculatum (or var. ???), cell body 55 μm long, 57 μm wide, L/W=1.0, x 640, a small pond near Yamaguchi university, Yamaguchi city, Yamaguchi Pref., November 21, 2004, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum Cosmarium subauriculatum

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