Family: Small, less than 50 μm;
oblong to ovate; ridges faint or absent.
Genus: Body ovate in locomotion, longer than broad, with clear zone as anterior part;
uninucleate (Illustrated Guide, 1985).
Species: Locomotive 8-12 μm long,
8-12 μm wide (Illustrated Guide, 1985; How to know the
protozoa, 1979).
Body long-ovoid to fan-shaped; without pseudopodia in locomotion; clear, thin anterolateral margin;
nucleus 2 μm diam.,
endosome one μm (How to know the protozoa, 1979).
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