Genus: Pseudostome lacks lobed collar; test round or oval in cross-section; pseudostome relatively large,
with or lacking a collar (Illustrated Guide, 1985).
Species: 70-150 μm long;
50-130 μm diam.;
test like D. lobostoma but of clear tubercules with
imbedded quartz granules;
pseudostome polygonal, not lobed, 20-50 μm diam.,
on short collar (Illustrated Guide, 1985).