Genus: Tectum flexible, punctate, spiny or folded; body mound-like in locomotion; pseudopods clear, conical, under or through tectum (Illustrated Guide, 1985). Species: 14-80 μm in locomotion, usually 24-55 μm; tectum clearly visible; pseudopodia rarely produced; often many trailing filaments (Page, 1976).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: Damp area near Ichinokawa primary school, Ichono-kawa (river), Higashi-Matsuyama city, Saitama Pref., Japan, March 25, 2006 by Y. Tsukii