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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium oblongum
Bennett

Cosmarium oblongum Species: Cell body small in size, 50-56 μm long, 22-23 μm wide, L/W=2-2.5, slightly constricted at the center; semicells elongate ellipsoidal in shape, cell wall smooth; chloroplast laminae ridged and radially arranged (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> C. cucurbita;


Cosmarium oblongum Bennett ?, cell body 54 μm long, 18.5 μm wide, L/W=2.9, isthmus 17 μm wide, x 640, No. 5-1, 5-2, Midagahara (bog/marsh), Tate-yama (Moutain), Tateyama town, Toyama Pref., Japan, August 23, 2006, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium Cosmarium

Images of collecting locality: No. 5, Midagahara (bog/marsh), Tate-yama (Moutain), Tateyama town, Toyama Pref., Japan, August 23, 2006, by Y. Tsukii


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