Genus: Body long, rear usually pointed (Illustrated Guide, 1985).
Elogate; snout or neck-like prolongation (proboscis) conspicuous; contractile vacuoles two or more (Kudo, 1966).
Contractile vacuoles usually lie in a row along the dorsal surface (Carey, 1992).
Species: Elongate; 700 μm long; no separate tail region;
macronucleus moniliform; contractile vacuoles line the dorsal surface and extend right to the
tip of the neck region (Carey, 1992).
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