Agathotoma stellata is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
The length of the shell attains 6 mm, its diameter 2 mm.
(Original description in Latin) The orange shell is elongated with a spire that surpasses the aperture. The surface is finely striated spirally and ribbed longitudinally, with 6-7 continuous, compressed, arched, and sharp ribs on the body whorl. These ribs are transparent and create hollow spaces. The outer lip is thickened and externally flat, with a posterior section that is thickened and sinuous. The columella is covered with a fine callus. [1]
This marine species occurs from Baja Californica, Mexico, to Nicaragua and Panama and further south to Peru.[2]