Genus: Body fills porous siliceous envelope, a pseudopodium (axopodium) through each pore;
on a stalk (How to know the protozoa, 1979).
Organic capsule with polygonal pores; cell body near the capsule; colonial or single
(Illustrated Guide, 1985).
Images of collecting locality:
No.5/6, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii