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 Perty ??,
test 270 μm long, 80 μm wide, L/W=3.4,
pseudostome 60 μm wide, P/W=,
x 200, x 400, x 640, Onnenai, Kushiro marsh, Kushiro city, Hokkaido, Japan, October 16, 2005 by Y. Tsukii 50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Test 260 μm long, 80 μm wide, L/W=3.3,
pseudostome 70 μm wide, P/W=, x 200, x 400, x 640
Test 360 μm long, 100 μm wide, L/W=3.6,
pseudostome 100 μm wide, P/W=, x 200, x 400, x 640
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
