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 120 μm long, 80 μm wide, L/W=1.5 (excluding spines, 8 μm), isthmus 32 μm wide,
x 640, Maimeno-ike (pond), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Cell body 113 μm long, 72 μm wide, L/W=1.6 (excluding spines, 7 μm), isthmus 32 μm wide, x 640
Images of collecting locality:
Maimeno-ike (pond), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii
Please click on images for viewing enlarged.
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