Genus: Test circular, ovoid or discoid; pseudostome eccentric, circular or ovoidal;
with or without spines (Kudo, 1966).
Species: 53-85 μm long,
42-66 μm wide;
28-45 μm high;
test oval, flattened toward pseudostome, hemispheroid laterally; pseudostome oval, 18-28
x 10-15 μm (Illustrated Guide, 1985).
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