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