Oikomonas termo Kent, 1880. Body ovate or subspherical, somewhat compressed, rounded posteriorly, free-swimming, or attached by a thread-like pedicel of variable length, the anterior margin notched or emarginate and with a projecting lip-like angle, the flagellum arises from the notch produced by the lip-like prominence in held slightly curved in front of the cell, it is about twice the length of the body, cytoplasm colourless, more or less granular, contractile vacuole posterior, nucleus spherical, subcentral. Length of body 5.1 to 8.5 microns .
