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:
Water reservoir, near Teruoka pasture, Nabekura highland, Iiyama city, Nagano Pref., October 19, 2008, by Y. Tsukii