Actaeon curtulus Dall, 1890 (original combination) Microglyphis curtula is a species of sea snail, a marine gastropod mollusk in the family Ringiculidae.

The surface is covered with sharp, deep, close set, spiral grooves minutely punctate at the bottom.

The shell contains three whorls, beside the prominent, polished, smooth, globular, sinistral protoconch.

The columella is short, thin, very much twisted, so that its outer edge presents a plait-like appearance, while the shell seems almost canaliculate, though the columella is continuous with the basal margin.

Above the twisted edge and separated from it by a deep channel is a second less prominent plait.