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).
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
