Folinella excavata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

[2][4] The white shell is solid, opaque and rather glossy.

The shell shows prominent spiral ridges, of which there are three on the main part of the body whorl, and two slighter ones at the base, and two ridges on the spire whorls.

They are crossed obliquely by sharp longitudinal ribs, extending to the base.

[3] This marine species occurs in the following locations:[2]