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).
Images of collecting locality:
Heisei-no-mori park, Kawajima (Kawashima) town, Saitama Pref., February 25, 2006 by Y. Tsukii
Recent study on Vannella simplex: Smirnov, A.V., et al., Morphological, ecological and molecular studies of Vannella simplex Wohlfarth-Bottermann 1960 (Lobosea, Gymnoamoebia), with a new diagnosis of this species, Protist, vol. 153, 367-377 (2002).