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

The surface appears perfectly smooth and glazed with traces of brown wavy lines.

It consists of four barely convex whorls, increasing rapidly in size under an apical angle of 160 ° on average.

The base of the shell is moderately convex, topped in the center with a more whitish coating that thickens toward the aperture to form a flattened and callous auricle at the end of the columellar edge and above a relatively narrow umbilical opening.

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