See text Fenimorea is a genus of carnivorous sea snails, marine gastropod mollusks in the family Drilliidae.

The whorls of the spire show strong, broad axial ribs that are retractively bent and reduced in the depressed groove below the summit and extend anteriorly to the fasciole on the base.

The combination of these two elements gives to the surface a peculiar effect, resembling the scales on some butterfly wings.

The fasciole itself and the area immediately posterior to it, as well as the rest of the columella, are marked by spiral threads.

The basal sinus is deep and reflected at the edge with a strong parietal callus.