Pseudorhaphitoma mamillata is a small sea snail, a marine gastropod mollusk which belongs to family Mangeliidae.

This shell is very remarkable on account of the large size of its two, convex, papillose protoconch whorls.

The others are convex and show 7-8, almost straight and strong ribs extending to the base of the body whorl.

The aperture is oblong and measures almost one-half of the total length of the shell.

[2] It is commonly found in localities of the tropical Indo-West Pacific.