Family: Small, less than 50 μm; oblong to ovate; ridges faint or absent.
Genus: Body fan-shaped in locomotion; Anterior, clear fan lacks bosses (Illustrated Guide, 1985).

Vannella sp. 18 clips Japan, 1998	Vannella sp. 4 clips 28 x 76 μm L/W=0.37 Japan, 1998	V. simplex 6 clips 20-28 x 64-76 μm L/W=0.34 Fujimi Saitama, 2000
V. simplex 13 clips Japan, 1998	V. simplex 7 clips Japan, 1998	V. simplex 5 clips Japan, 1998
V. simplex 14 clips U.S.A., 1998	V. simplex 3 clips U.S.A., 1998