Genus: When extended, trumpet-shaped or cylindrical; highly contractile; some with mucilaginous lorica; conspicuous peristomal field frontal; contractile vacuole anterior-left; fresh water (Kudo, 1966).
Species: Body trumpet-shaped; macronucleus moniliform; 1-2 mm when extended; contractile vacuole anterior; pellicle dark, bluish-green color (How to know the protozoa, 1979).
Cell body slenderly trumpet shaped, 1000-2000 μm long when fully extended; macronucleus moniliform; cortical granules blue-green; without symbiotic algae (Foissner and Wölfl, 1994).
->> Description at WPRNO Google Image Search
S. coeruleus
mac. moniliform
no bristles
μm
Japan, 1999
Movies 
S. coeruleus
μm
Niigata, 2001
S. coeruleus
mac. moniliform
μm
Gyoda
Saitama, 2001
S. coeruleus
mac. moniliform
μm
Kasai Seaside Park
Tokyo, 2001
S. coeruleus
mac. moniliform
μm
Sendabori
Chiba, 2002
S. coeruleus
stock Ika-1
mac. moniliform
μm
Kasama Park
Ibaraki, 2002
S. coeruleus
stock Ika-1
mac. moniliform
μm
Kasama Park
Ibaraki, 2002
S. coeruleus
mac. moniliform
μm
???
???, 2003
