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: Cell body small, 8.5-13 μm long, 7-12 μm wide, isthmus 2.8-4.3 μm wide; (Illustrations of the Japanese Fresh-water Algae, 1977). |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Cosmarium succisum W. et G.S. West var. succisum: Cell body small, 8.5-13 μm long, 7-12 μm wide, isthmus 2.8-4.3 μm wide; (Illustrations of the Japanese Fresh-water Algae, 1977).