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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 sp. (G. truncata ?), cell body 10-12 μm long, 6 μm wide, x 640, Handa Numa (Pond), Otawara city, Tochigi Pref., Japan, 2001 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Goniomonas Goniomonas Goniomonas Goniomonas

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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