Gamophyceae:
Zygnematales: Desmidiaceae
Cosmarium thwaitesii
Ralfs
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).
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Similar species -->>
C. cucurbita;
C. cucurbitinum;
C. diplosporum;
C. globosum;
C. oblongum;
Cosmarium thwaitesii Ralfs ?,
cell body μm long, μm wide, L/W=, isthmus μm wide,
x 640, No.4, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Cell body 41 μm long, 22 μm wide, L/W=1.9, isthmus 19 μm wide, x 640
Images of collecting locality:
No.4, Yahei-daira-shitsugen (Yahei-daira marsh), North of Higashidaiten, Azuma mountains, Yonezawa city, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
Please click on images for viewing enlarged.
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