Anatoma japonica

Anatoma japonica is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Anatomidae.

Description
The length of the shell varies between 1 mm and 2.5 mm. It has a trochiform shell. The spire contains 3½ rather convex whorls. They are finely decussated by elevated longitudinal striae and close striae. The longitudinal striae are flexuous at the base. The aperture is subcircular. The outer lip is dilated and reflexed in the middle.

Distribution
This marine species occurs in deep water off the Philippines, Japan, and Southeast Africa.