Diagnosis: Size about 37 µm long and 48 µm wide. Peduncle long, about 1/3 or 1/4 the size of the body, with four or five flexible transverse appendages. Transversely striated pellicle. Narrow, flat-surfaced peristomial disc with circular peristomial membrane. Infundibulum reaching about half of the body length and constricted in front of the contractile vacuole. Spiral macronucleus. Found on oligochaetes, Pristinis minuta.
Remarks: diagnosis according to Righi (1973)