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Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium lundellii
Delponte var. circulare (Reinsch) Krieger

Cosmarium lundellii 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: (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> C. pachydermum;

Cosmarium lundellii var. circulare (Reinsch) Krieger, cell body 65 μm long, 56 μm wide, L/W=, isthmus μm wide, x 640, Water field near Bungo-Mori railway station, Kusu town, Oita Pref., Japan, September 8, 2008 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium
Cell body μm long, μm wide, L/W=, isthmus μm wide, x 400, x 640
Cosmarium Cosmarium
Cell body 66 μm long, 57 μm wide, L/W=, isthmus μm wide, x 400, x 640
Cosmarium

Images of collecting locality: Water field near Bungo-Mori railway station, Kusu town, Oita Pref., Japan, September 8, 2008 by Y. Tsukii

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