Species: Cell body 58-75 μm long, 26.5-31 μm wide, L/W=2-2.5,
isthmus 20-29 μm wide; semicells broad ellipsoidal or ovoidal, apex broad circular or
narrowly flattened; cell wall finely dotted; band-form chloroplasts aligned along inner cellwall
(Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->>C. cucurbita;
C. cucurbitinum;
C. diplosporum;
C. globosum;
C. oblongum;
Cosmarium thwaitesii Ralfs,
cell body 40 μm long, 23 μm wide, L/W=1.7, isthmus 21 μm wide,
x 640, No.1, a small marsh, East of Tojuro, Azuma mountains, Kitashiobara village, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No.1, a small marsh, East of Tojuro, Azuma mountains, Kitashiobara village, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii