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).

50 μm 100 μm 150 μm; x 400