Genus: Body blunt at rear; kineties spiralled when body contracts (Illustrated Guide, 1985).
Species: 300 μm long;
no expansion or attenuation of the body (?);
peristome 1/2 body length; simple ovoid macronucleus;
(Carey, 1992).
150-400 μm long; with one, oval macronucleus
(How to know the protozoa, 1979).
