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). Species:

50 μm 100 μm 150 μm; x 400 : 31 μm 63 μm 94 μm; x 640