Suborder: Paroral dikinetid shorter than other oral structures;
no ribbed wall from paroral dikinetids towards cytostome (Illustrated Guide, 1985).
Family: Small, < 50 μm,
ovoid; anterior pole flat, round, unciliated; scuticovestige ciliated; long oral area.
Genus: Cytostome at or ahead of equator (Illustrated Guide, 1985; cytostome behind equator
-->> Uropedalium, Urocyclon, Homalogastra). Anterior region not ciliated;
cytostome on the ventral side close to left border in the anterior half; contractile vacuole terminal
(Kudo, 1966). Ovoid, pyriform or elongate; cytostome small just above the equator; caudal cilium;
somatic ciliation bipolar; a macronucleus anterior; a contractile vacuole posterior (Carey, 1992).
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Uronema ?, x 400, x 640, Uruguay Nov. 1999, photo by Yuuji Tsukii
