Genus: Body ovoid, inflexible; ventral surface flattened, dorsal surface convex; peristome broadly triangular (Kudo, 1966). Cell body is ovoid, dorsoventrally flattened; dorsal surface may be equipped with some ornamentation; three groups of cirri (frontoventral, transverse & caudal); macronucleus C-shaped, "3"-shaped, or horsehoe-shaped (Carey, 1992). Species:

50 μm 100 μm 150 μm; x 400

E. moebiusi Kahl, 1930-5: Ovoid, with a large AZM; 60 μm long, peristomial collar absent, dorsal 5 ridges; ventral with seven ridges; peristome 2/3 cell length; 10 frontoventral, 5 transverse, 4 caudal cirri; macronucleus 3-shaped; common species (Carey, 1992).