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Cryptophyceae: Cryptomonadales: Goniomonadaceae
Cryptomonadida

 Goniomonas truncata
Syn. Cyathomonas truncata (Fresenius) Fisch, 1885

Goniomonas Genus: Small, oval, compressed, anterior end obliquely truncate; without chloroplasts; with two equal or subequal anterior flagella; colorless; contractile vacuole anterior (Kudo, 1966).
Species: Cell body 15-25 μm long, 10-15 μm wide (Kudo, 1966). 15-30 μm long; body nearly oval; no chloroplasts; reservoir-pocket distinct, surrounded by ring of bright-appearing granules; stored carbohydrates stain red with iodine; stagnant water or infusion (How to know the protozoa, 1979).

Goniomonas truncata, cell body 10 μm long, 4.5 μm wide, x 640, rice field near Hanekura bridge, Muneoka, Shiki city, Saitama Pref., Japan, May 30, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Goniomonas truncata Goniomonas truncata

C. truncata Ehrenberg: cell body 15-25 μm long, 10-15 μm wide (Kudo, 1966). 15-30 μm long; body nearly oval; no chloroplasts; reservoir-pocket distinct, surrounded by ring of bright-appearing granules; stored carbohydrates stain red with iodine; stagnant water or infusion (How to know the protozoa, 1979).

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