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Euglenophyceae: Sphenomonadales
Euglenida: Sphenomonadida: Anisonemidae

 Marsupiogaster sp.
Dujardin

Marsupiogaster Family: Colorless body; two flagella, one directed anteriorly and the other usually posteriorly; stigma absent.
Genus: Oval, flattened, longitudinally striated; anterior flagellum about four times longer than shorter trailing one; fresh or salt water (How to know the protozoa, 1979).
Species:

Marsupiogaster sp., cell body 18 μm long, 8.5 μm wide, anterior flagellum 43 μm long, recurrent (trailing) flagellum 23 μm long, x 400, x 640, Mashiko City, Tochigi-Pref., Japan, 1999, collected by H. Shiomizu, photo 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
Marsupiogaster Marsupiogaster

Marsupiogaster striata (Schewiakoff): 27 μm long (How to know the protozoa, 1979).

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