Genus: Test ovoid, symmetrical, compressed, composed of a transparent membrane with or without adherent extraneous particles
(Cash & Wailes, The British Freshwater Rhizopoda and Heliozoa vol. III, 1915).
Species: Test covered with many grains of quartz and various extraneous particles, 55-97 μm long, 31-74 μm wide; pseudostome lacking any collar, cytoplasm containing algal endosymbionts (Cash & Wailes, The British Freshwater Rhizopoda and Heliozoa vol. III, 1915).
Images of collecting locality:
No.4, Yokotashiro, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, August 3, 2008 by Y. Tsukii