Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome at end of
bent neck; test more or less coiled or folded (Illustrated Guide, 1985).
Species: |
Images of collecting locality:
a wetland at Igashira park, Mooka city, Tochigi Pref., Japan, April 1, 2006 by Y. Tsukii