Genus: Test more or less flask-shaped, with more or less neck (Illustrated Guide, 1985). Species: Test 160-175 μm long, 65-75 μm wide; (Cash, British Freshwater Rhizopoda and Heliozoa II, 1909).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: No.6, Shibayachi marsh, Odate city, Akita Pref., Japan, September 22, 2007 by Y. Tsukii