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

[1] The shell is oval with the spire concealed.

It is covered with transverse oval spots margined with white, somewhat ocellate, and disposed longitudinally.

[2] P. guttatum can be found in Caribbean waters, ranging from eastern Florida to Colombia and the Virgin Islands.

This Marginellidae-related article is a stub.