Stomatolina rubra, common name the red stomatolina, is a species of small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

The depressed, rather thin shell has a small, conical spire.

It is reddish brown, lighter beneath, or variously variegated.

The surface is covered with close fine hair-like spiral striae, and with two low keels above the periphery, the upper one nodose.

The wide body whorl is depressed, flattened above, convex below, and impressed at the axis.