Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large,
with or lacking a collar (Illustrated Guide, 1985).
Species:
Difflugia claviformis Ehrenberg or
D. elegans ?,
test 145 μm long (including spiny projection, 25 μm), 48 μm wide, L/W=, pseudostome 25 μm wide,
x 200, x 400, x 640, Ohnuma (a pond in Ohnuma enchi), Nasu-shiobara city (formerly Shiobara town), Tochigi Pref., Japan, July 23, 2006, collected by Eizaburo Tsukii, photo by Y. Tsukii 50 μm
100 μm
150 μm; x 400
Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large,
with or lacking a collar (Illustrated Guide, 1985).
50 μm
