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Gamophyceae: Desmidales: Desmidiaceae
(Charophyceae: Zygnematales: Desmidiaceae)

 Micrasterias rotata
(Greville) Ralfs

Micrasterias rotata 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).

Micrasterias rotata (or M. thomasiana var. notata (Nordstedt) Grönblad ?), cell body 175 μm long (semicell μm long), 165 μm wide, x 400, x 640, Vermont-Maine U.S.A., August 7-13, 1999, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Micrasterias Micrasterias Micrasterias Micrasterias
scale 31 μm scale 63 μm scale 94 μm; x 640
Micrasterias

* 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).

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