Genus: Test with 2 pseudostomes; with thin, organic test (Illustrated Guide, 1985). Species: Colonial or solitary; cell body spherical (8-20 μm in diam.), covered with a delicate hyaline membrane; two pseudostomes situated at or near two opposite poles; cytoplasm colorless, transparent, finely granular, filling the envelope (test) except near the two pseudostomes; a single nucleus with a nucleolus; one large, or two or three small, colored, oil-like globules present; pseudopodia extremely attenuate, radiating, straight or dichotomously branced, emanating each pseudostome; reproduction by fission or tetrad division

31 μm 63 μm 94 μm; x 640

Images of collecting locality: Fujimitashiro, Oze-ga-hara (Oze marsh), Katashina village, Gunma Pref., Japan, October 6, 2007 by Y. Tsukii