Family: Anterior preoral kinetal arcs of all, body tapers at forward end.
Genus: With distinct postoral break or unciliated field in ventral body cilia; body somewhat vase-like; oral region a cup-shaped anteroventral depression (Illustrated Guide, 1985).
->> Description at WPRNO Google Image Search
P. vorticella
63 x 40 μm
Japan, 2000
