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).
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Saprodinium sp.
38 x 6 μm
Japan, 199?
