Locomotive cell elongate when in active monopodial movement). Pseudopodia clear and eruptive. Uroid temporary and bulbous. Clear anterior hyaline region with a granular cytoplasm without contractile vacuoles or crystals. Nucleus spherical with a few chromatin granules and a large irregularly shaped endosome. Cysts round or oval, with 1 to 8 nuclei with glycogen bodies in immature cysts. Habitat: Commensal, intestine of man, apes, guinea-pigs, cockroaches, turtles, frogs and fowls.