Genus: Test more or less flask-shaped, with more or less neck (Illustrated Guide, 1985). Species: Test 95-120 μm long (Penard, 170-200 μm); (Cash, British Freshwater Rhizopoda and Heliozoa II, 1909).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: No. 2, Iroha-numa (marsh/bog), Zao mountain, Yamagata city, Yamagata Pref., Japan, August 2, 2006 by Y. Tsukii