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).
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31 μm
63 μm
94 μm; x 640
Cosmarium oblongum,
cell body 44 μm long, 22.5 μm wide, L/W=2.0, isthmus 10.5 μm wide,
x 640, a small marsh near prefectural road route 342, Sukawa highland, Kurikoma mountain, Higashi-naruse village, Akita Pref., Japan, June 24, 2007 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
a small marsh near prefectural road route 342, Sukawa highland, Kurikoma mountain, Higashi-naruse village, Akita Pref., Japan, June 24, 2007 by Y. Tsukii
