Atlanta gaudichaudi is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.
(Originally described in Latin) The shell is glassy, somewhat ovate-discoid, keeled, translucent, and very thin. The spire is very small and flattened. There are five whorls, which are convex-depressed, with the body whorl being keeled. This keel is bordered at the base with a pink margin. The aperture is ovate to sub-acute and notched at the front; the peristome is thin and sharp.
The operculum is glassy, ovate-subacute, thin, translucent, and has only a few spirals.