Ammonicera rota is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.

(Original description) The shell is discoid, flattened on both sides but slightly sunken in the center, with a pearly semi-transparent white or very pale wax-like color.

The shell consists of only 2½ whorls, which are convex, well-defined, and gradually increase in size from a smooth, relatively large apex.

The body whorl is not perfectly rounded but appears slightly subangulated above and below, possibly due to the reduced convexity of the periphery.

The aperture, raised slightly above the upper surface of the shell, is small and nearly circular, with only a minor intrusion from the preceding whorl.