Cell body ovoid, with pre-oral suture skewed left to a point; ventrally flattened, dorsally convex
(How to know the protozoa, 1979).
With distinct postoral ? beak or unciliated field in ventral body cilia; preoral kinety complete
(Illustrated Guide, 1985).
Dorsal surface lacks bristles (cf. with bristles Trithigmostoma) ;
central zone devoid of cilia (Carey, 1992).