Eucithara gibbosa is a small sea snail, a marine gastropod mollusk in the family Mangeliidae.
Not to be confused with Eucithara gibbosa <small>Hedley, 1922</small> (, which is a synonym of Eucithara novaehollandiae <small>(Reeve, 1846)</small>
The length of the shell attains 8 mm, its diameter 4.5 mm.
The smooth whorls are nodulous at the shoulder. The ribs are slightly flexuous. The color of the shell is ashy white, encircled by faint orange-brown lines, the back stained with pale black at the upper part.
This marine species occurs off the Philippines and off Australia (Queensland, Western Australia).