Dillwynella aulacophora is an extinct species of sea snail, a marine gastropod mollusk in the family Skeneidae.

The depressed spire consists of four or five subangular whorls, equipped with a broad groove between the spiral obsolete angle and slightly protruding bead that comes in above the linear and deep suture.

In the middle of this groove, there is a small furrow that marks its deepest point.

The body whorl is equal to five-sixths of the total height simply striated.

[1] This marine species was found as a fossil in a coal mine near Mons in Belgium.