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 41 μm long, 22 μm wide, L/W=1.9,
x 640, No.5, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, June 1, 2008 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No.5, Karakemi marsh, Yasaka, Omachi city (formerly Yasaka village), Nagano Pref., Japan, June 1, 2008 by Y. Tsukii