Genus: Pseudostome lacks lobed collar; test round or oval in cross-section;
pseudostome relatively large, with or lacking a collar (Illustrated Guide, 1985).
Species: 100-300 μm long;
120-320 μm wide (diam.);
with up to 15 spines at level of broadest diam as a crown;
pseudostome round, 4-20 dentate lobes,
50-150 μm diam. (Illustrated Guide, 1985).
Test ovoid to spheroid, circular in cross-section; crown broadly rounded, with a variable number of
spines; aperture (pseudostome) more or less convex in profile, central and its border multidentate
or multlobate; test with fine sand-grains, opaque;
180-230 μm long,
about 150 μm wide (diam.) (Kudo, 1966).
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