Prunum lipei is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.

[1] Original description of holotype: "Shell of medium size for the genus, cylindrically ovate; polished ivory in color throughout with just a hint of a light brown band around the center of the body whorl.

Spire completely involuted; aperture narrow, of constant width and running full length of the shell; outer lip smooth, slightly reflected, mostly straight but arched posteriorly well above the spire, finely denticulate along most of its length.

"[2] Locus typicus: "Off Cabo Catoche, Yucatan, Gulf of Mexico.

"[3] Prunum lipei can be found in Caribbean waters, ranging from Campeche Bank to Quintana Roo,[4] and in the Gulf of Mexico.