Genus: Outer envelop made of two kinds of siliceous element; tangential scales or pearls and radial
spicules (Illustrated Guide, 1985).
Similar genus ->> Nuclearia; Rabdiophrys sp.,
cell body 27 μm in diam., axopodia (or filopodia ?) about 50 μm long,
x 640, Aizu Recreation Park, Aizuwakamatsu city, Fukushima Pref., Japan, May 4, 2005 by Y. Tsukii
94 μm; x 640