Antiguraleus aeneus is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

(Original description) The small, solid shell has a cylindro-fusiform shape.

On decollate specimens six whorls remain, divided by linear sutures.

The sculpture shows prominent, arcuate ribs, each slightly overhanging the one below, seven to a whorl, consecutive on the spire, smaller on the body whorl where they do not reach the base.

[2] This marine species is endemic to Australia and occurs off Queensland.