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.7, Oh-numa marsh, Akita-Hachimantai, Kazuno city, Akita Pref., Japan, September 21, 2007 by Y. Tsukii