Family: Scales round to elliptical, thin. Genus: Test round or oval in cross-section; pseudostome terminal with dentate scales. Species: Test oviform without spines, moderately compressed, 22-52 μm long, width 0.5-0.7 of the length; pseudostome circular, 6-12 μm diam.; body scales circular to broadly oval in shape, 5-8 in each row, 2.5-4 μm long (Cash & Herbert, 1915).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: No. 1, 2, Numa-no-hara marsh (Genseikaen), Madarao highland (Niigata & Nagano Pref.), Myoko village, Niigata Pref., Japan, June 17, 2006 by Y. Tsukii