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).
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).