Genus Apolimia Korganova, 1987

Diagnosis: Shell ovoid, quite large, opaque, round in cross section, densely covered with round or oval silica scales (idiosomes). There are no exogenous elements. Aperture round. Ostial plates more round than the somatic ones, correctly arranged in a single row. Axial symmetry.
The genus is named after the island of Apolima (Western Samoa), on which it was discovered.
Type species: A. rotundistoma (monotypic)

Apolimia rotundistoma Korganova, 1987

Diagnosis: Shell large, regular oval, practically not narrowed towards the anterior end, sometimes close to spherical. It is covered with silica plates, similar in shape and size, round, oval, elongated, sometimes irregular in shape, embedded in organic cement. They are adjacent to each other, but do not overlap. There are no mineral particles or other inclusions. The aperture is round or irregularly round, 25 µm in diameter, located terminally and is a simple hole in the shell wall; no other morphological formations. The aperture is bordered by one row of more round and orderly arranged plates. The symmetry is axial. Pseudopodia, cytoplasm, cysts, method of formation of covering elements were not observed.

Dimensions: According to Korganova (1987): Shell length 105—135 µm; width 95—110 µm.

Habitat: Soil.

Geographical distribution: Western Samoa.