Genus: Test more or less flask-shaped, with more or less neck (Illustrated Guide, 1985). Species: Test 80-160 μm long, 40-60 μm wide; (Cash, British Freshwater Rhizopoda and Heliozoa II, 1909).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: No.3, Iyari marsh, Omachi city, Nagano Pref., Japan, June 4, 2007 by Y. Tsukii