 
 
|  Family: Body box-shaped; body cilia as short segments of kinetids at front and rear. Genus: > 4 caudal spines (Illustrated Guide, 1985). Laterally compressed; pellicle with ridges and folds; buccal cavity has a tooth-like projection on the anterior edge (Carey, 1992). Species: 
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 50 μm
 50 μm
 100 μm
 100 μm
 150 μm; x 400
 150 μm; x 400
 
 
 
 
 
 
 
S. dentatum Lauterborn, 1908: Ovoid; 80 μm long; three macronuclei (Carey, 1992).
S. halophilum Kahl, 1930-5: Ovoid; 50 μm long; two macronuclei (Carey, 1992).