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Chlorophyta: Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium moniliforme
(Turpini) Ralfs f. moniliforme

Subgenus: Cell body cylindrical or dumbbell-shaped, dorso-ventrally not compressed, transverse section circular.
Section [ Eudysphinctium ]: Cell body dumbbell-shaped, constriction strong, cell surface smooth, dotted or punctated (Illustrations of The Japanese Fresh-water Algae, 1977).
Species [f. moniliforme]: Cell body 21-(30-56) μm long, 11-(15-29) μm wide, isthmus 4-(4.5-11) μm wide, L/W=2; semicells spherical; cell wall smooth (Illustrations of The Japanese Fresh-water Algae, 1977).

Cosmarium moniliforme (Turpini) Ralfs f. moniliforme ?, tape No. 0067, time code 0926, cell body 20 μm long, 12 μm wide, Hiroshima Pref., Japan, October, 1998, by Y. Tsukii

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