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Euglenophyta: Heteronematales: Astasiidae

Urceolus sabulosus

Family: Similar to Euglenidae in body form and general structure, but without chromatophores (chloroplasts); body highly plastic, although usually elongate spidle.
Genus: Body colorless; plastic; flask-shaped; striated; a funnel-like neck; posterior region stout; a single flagellum protruded from funnel and reaches inward the posterior third of body (Kudo, 1966).

Species: Spindle-form; covered with minute sand-grains; about 58 μm long; fresh water (Kudo, 1966). 50-60 μm long, with attached sand grains (How to know the protozoa, 1979).

Urceolus sabulosus, cell body 25 μm long, 11 μm wide, anterior flagellum 35 μm long, Japan, 1998 by Y. Tsukii

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