Gamophyceae:
Zygnematales: Desmidiaceae
Xanthidium armatum
(Brébisson) Rabenhorst ex Ralfs
Genus:
Variable in shape; strong constriction at center; semicell ellipsoidal, polygonal, etc.;
cell wall with simple or branching spines, most of them laterally aligned;
4 plate-like chloroplasts in each semicell; one or more pyrenoids in each chloroplast
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
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Xanthidium armatum (Brébisson) Rabenhorst ex Ralfs ,
cell body 127 μm long, 97 μm wide, L/W= (excluding spiny projections 10 μm long), isthmus 38 μm wide,
x 640, No.1, Shimo-Kenashitai (marsh), Hakkoda mountain, Aomori city, Aomori Pref., Japan, September 13, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
No.1, Shimo-Kenashitai (marsh), Hakkoda mountain, Aomori city, Aomori Pref., Japan, September 13, 2006 by Y. Tsukii
Please click on images for viewing enlarged.
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