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).

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U. marinum ? cell 31-37 μm Japan, 199?	Uronema sp.1 cell 25-31 μm Kawagoe Saitama, 2001	Uronema sp.1 cell μm Midorigaoka park Sukagawa Fukushima, 2003	Uronema sp.1 conjugation Miyazawa Furukawa Miyagi, 2003
Uronema sp.1 33 x 17 μm Mizuko Fujimi Saitama, 2004	Uronema sp.2 cell 31 μm Japan, 199?	Uronema sp.2 cell 20 μm Saitama, 1999	Uronema sp.3 cell 31-35 μm Japan, 199?
Uronema sp.4 ? or Sathrophilus ? cell 57 x 28 μm Japan, 1999	Uronema sp. ? cell μm Kawagoe Saitama, 2002

Similar Genus ->> Cyclidium; Pleuronema

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