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Raphidophyceae: Raphidomonadales

Gonyostomum depressa
(Lauterborn) Lemmermann

Gonyostomum depressa Genus (Diesing): Cells obovate or almost spherical, flattened dorsoventrally; rod-shaped trichocysts around cell periphery or concentrated at the 2 ends of the cell; flagella usually same length as cell; but trailing flagellum may reach twice that length; many chloroplasts in a single layer in the cell periphery (Illustrated Guide, 1985). (Illustrations of The Japanese Fresh-water Algae, 1977).
Species: Cell body circular in shape, dorsoventrally flattened, about 35 μm long, 10 μm in thickness; a nucleus ellipsoidal, located at the center of the cell body; many elliptical chloroplasts located at perphery of the cell body; trichocysts uniformly distributed (Illustrations of The Japanese Fresh-water Algae, 1977).


Similar genus ->> Vacuolaria;

Gonyostomum depressa (Raphidomonadales, Raphidophyceae), cell body spherical, flattened dorsoventrally, 39 μm long, 31 μm wide, many rod-shaped trichocysts around cell periphery, two flagella (length unequal or equal ?), nucleus centrally located, contractile vacuole anterior, x 400, x 640, Saitama Pref., Japan, June 2000, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640

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