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:

E. aediculatus Dragesco, 1960: Ovoid, 80 μm long; peristomial collar present; a spike-like ornamentation emerges on the right of the peristomial collar; dorsal 4 ridges; ventral 2 ridges; peristome extend 2/3 of the body length; 8 frontoventral, 5 transverse, 4 caudal cirri; macronucleus C-shaped (Carey, 1992).

E. crassus (Dujardin, 1841) Kahl, 1930-5: Ovoid, slightly elongate; 130 μm long; peristomial collar absent; dorsal eight longitudinal ridges; ventral not ornamented; peristome long and narrow, 2/3 of the body length; 10 frontoventral, 5 transverse, 5 or 6 caudal cirri; macronucleus C-shaped (Carey, 1992).
E. cristatus Kahl, 1930-5: Ovoid, 60 μm long; peristomial collar absent; dorsal 6 ridges, ventral plain; peristome narrow, about 1/2 of the body length; 10 frontoventral, 5 transverse, 4 caudal cirri; macronucleus C-shaped (Carey, 1992).