Cyrtophorian ciliates usually dominate the microbial community in aquatic biofilms and benthic habitats， and also are the common parasites of fish. However， recent studies indicate that their diversity is underestimated. The present study investigated the morphology and ciliature of Odontochlamys shenae sp. nov. collected from freshwater in Shanghai， China， using live observation and protargol staining. The new species was characterized by a combination of morphological features: cell size about 60-80 μm × 30-33 μm in vivo， 12-15 nematodesmal rods， 6 or 7 right and 6-8 left kineties， terminal fragment consisting of 8-20 basal bodies， three contractile vacuoles and freshwater habitat. Furthermore， we reviewed the genus Odontochlamys and its biogeography shows a moderate endemicity model. In addition， a key for identifying Odontochlamys species were provided.