Genus: Body long to ovoid; cilia on 1 surface (Illustrated Guide, 1985).
Long, thin, cylindrical in shape (vermiform); flattened laterally; contractile; anterior is truncated
with cytostome lying along the apical edge; several contractile vacuoles along the dorsal edge
(Carey, 1992).
Species: Cell body vermiform, highly contractile, up to 650 μm long,
posterior pointed; macronucleus moniliform; contractile vacuole lying against dorsal ridge along the entire
length of the body (Kahl, 1935).
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