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, Shibayachi marsh, Odate city, Akita Pref., Japan, September 22, 2007 by Y. Tsukii