Genus: Oval to ellipsoidal or conical; 1 or more caudal cilia; ciliation uniform, except in posterior region which may be without cilia; cytostome at or near anterior end, surrounded by ring of heavier cilia; contractile vacuole posterior (Kudo, 1966). Ovoid or cylindrical; apical cytopharynx; posterior bald; caudal cilia present; contractile vacuole posterior (Carey, 1992).
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A single caudal cilium present
U. farcta
28 x 22 μm
Japan, 1998
U. farcta
31 x 20 μm
cauda 12 μm
Japan, 1998
U. farcta
31 x 23 μm
cauda 13 μm
Hiroshima, 1998
U. furcata
23 x 15 μm
cauda 8 μm
Japan, 1999
U. farcta
Azure C staining
32 x 21 μm
cauda 15 μm
Yamagata, 1999
U. farcta
μm
cauda μm
Kuroiso
Tochigi, 2002
U. farcta ?
μm
a dividing cell
Naruto
Chiba, 2003
U. farcta ?
29 x 21 μm
Onnenai
Kushiro marsh
Hokkaido, 2005
U. farcta ?
μm
Teganuma Biotope
Abiko
Chiba, 2008
U. globosa ?
29 x 23 μm
cauda 8 μm
Kaga
Ishikawa, 2000
U. platystoma ?
42 x μm
cauda μm
Moroyama town
Saitama, 2003
U. platystoma ?
μm
Kannon-numa 1
Shimogo
Fukushima, 2008
U. platystoma ?
55 x 42 μm
Tane-ike
Togakushi highland
Nagano, 2005
U. platystoma ?
μm
cauda μm
Kurobane
Tochigi, 2003
Urotricha sp.
15 x 19 μm
cauda ? μm
Japan, 1998
Urotricha sp.2
μm
cauda ? μm
Kagami-gawa G.A.
Kochi, 2002
Urotricha sp.4
45 x 30 μm
Iroha-numa
Zao mountain
Yamagata, 2005Caudal cilia 2 or more
U. simonsbergeri ?
40 x 32 μm
Hakama marsh
Madarao highland
Niigata, 2005
Urotricha sp.
15 x 17 μm
cauda 8 μm
Japan, 1997