Genus: With a vase-like chitinous lorica to which stalked or stalkless organism is attached; fresh or salt water; numerous species (Kudo, 1966). Transparent; ovoid; collar indistinct; in lorica (How to know the protozoa, 1979). Solitary or colonial; with firm lorica (theca) as a cup or tube; protoplast with 1 anterior flagellum encircled laterally by well-developed collar; contractile vacuoles posterior in fresh water species (Illustrated Guide, 1985).
Species:
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S. depressa
lorica μm long
Kuroiso
Tochigi, 2001
S. depressa
or silimar sp.
lorica μm long
Mizumoto Park
Tokyo, 2001
S. depressa
or silimar sp.
lorica μm long
Koshigaya
Saitama, 2001
S. depressa ?
lorica μm long
Kibagata Park
Komatsu
Ishikawa, 2002
S. depressa
lorica 10 x 5 μm long
Onnenai
Kushiro marsh
Hokkaido, 2005
