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 115 μm long, 90 μm wide, L/W=1.3, isthmus 30 μm wide,
spiny projections 15 μm long,
x 640, Iroha-numa (marsh/bog), east side of Nakadaiten, Azuma mountains, Kitashiobara village, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Cell body μm long, μm wide, L/W=, isthmus μm wide, x 640
Images of collecting locality:
Iroha-numa (marsh/bog), east side of Nakadaiten, Azuma mountains, Kitashiobara village, Yamagata Pref., Japan, July 1, 2007 by Y. Tsukii
Please click on images for viewing enlarged.
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