Genus: Body fan-shaped in locomotion; Anterior, clear fan lacks bosses (Illustrated Guide, 1985).
Species: 35-80 μm wide in locomotion;
L/B < 0.5; hyaline veil sometimes only along front;
nucleus 7.7-10.8 μm (Page, 1976).
Vannella sp. (simplex ?),
cell body 56 μm long, 71 μm wide,
x 400, Japan, 199? by Y. Tsukii
50 μm
100 μm
150 μm; x 400