Gamophyceae:
Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)
Micrasterias rotata
(Greville) Ralfs
Genus:
Cell body flat, large, variable in shape, longer than wide; strong constriction at center;
each semicell with several notches; cell wall with many short spines
(Illustrations of The Japanese Fresh-water Algae, 1977).
Species:
Cell body 256-288 μm long, 192-258 μm wide,
constriction 31-40 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
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Micrasterias rotata (Greville) Ralfs, stock Gtk-1-2, axenic culture with KCM and Hyponex (photo 2005),
cell body μm long, μm wide, L/W=, isthmus μm wide,
x 200, x 400, Ko-numa (pond/marsh), Tsukiyono town, Gunma Pref., Japan, September 2003 by Y. Tsukii
50 μm
100 μm
150 μm; x 400
Cell body μm long, μm wide, L/W=, x 200, x 400, x 640
Cell body μm long, μm wide, L/W=, x 200, x 400
* M. rotata (Greville) Ralfs:
Cell body 256-288 μm long, 192-258 μm wide,
constriction 31-40 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
M. thomasiana Archer var. thomasiana:
Cell body 206-256 μm long, 168-210 μm wide,
constriction 21.5-28 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
M. thomasiana var. javanica Gutwinski:
Cell body 196-215 μm long, 154-168 μm wide,
constriction 22-26 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
M. thomasiana var. notata (Nordstedt) Grünblad:
Cell body 185-288 μm long, 174-256 μm wide,
constriction 22-31 μm wide
(Illustrations of The Japanese Fresh-water Algae, 1977).
Please click on images for viewing enlarged.
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