Genus: Ovoid to elongate; dorsal surface has reduced somatic ciliation; ventral with well developed kineties;
peristome apical, 1/3 of the body length; buccal ciliation massively developed; a single
macronucleus (Carey, 1992).
Peristome leads directly into cytostome; covex left side not ciliated ?, but bears bristles;
flat right side ? with 3-5 ciliary rows; perstome begins at pointed anterior end, 1/3 of the body length;
macronucleus simple; contractile vacuole subterminal (Kudo, 1966).