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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:

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Marsupiogaster sp., cell body 16 μm long, 9 μm wide, anterior flagellum 40 μm long, recurrent (trailing) flagellum 25 μm long, x 640, Torinome Kasen Park, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, September 1998 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Marsupiogaster Marsupiogaster Marsupiogaster

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

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