Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large,
with or lacking a collar (Illustrated Guide, 1985).
Species:
Similar species >>D. claviformis;
D. acuminata;
D. scalpellum;
Difflugia bacillariarum var. elegans (Penard) Cash (similar to D. bacillifera Penard),
test 190 μm long (including spiny projection 35 μm), 83 μm wide, L/W=2.3,
pseudostome 45 μm wide,
x 400, x 640, Ushidome-ike (pond), Norikura highland, Azumi village, Nagano Pref., Japan, May 28, 2005 by Y. Tsukii 50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
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
