Genus: Pseudostome lacks lobed collar; test round or oval in cross-section;
with or lacking a collar (Illustrated Guide, 1985).
Species: 220-300 μm long; 50-60 μm diam.; test, outline like dagger, nearly cylindroid; pseudostome nearly as wide as test, 30-40 μm, no neck, no collar (Illustrated Guide, 1985).
Images of collecting locality:
No.5, Omine-numa (pond/marsh), Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, October 12, 2008 by Y. Tsukii