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Family: Oral area subapical, ovoid, flattened, along ventral margin of laterally compressed body; both side
ciliated (Illustrated Guide, 1985).
Genus: Ventral side with a hyaline border, reaching posterior end and bearing trichocysts; dorsal side with either similar trichocyst-border or with trichocyst-warts (Kudo, 1966). |
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