Filodrillia trophonoides is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.

(Original description) The solid shell is white, high, narrow, conical, with a blunt apex and a rounded base.

The body whorl is short and roundly contracted at the base.

The outer lip is sharp, simple, scarcely inflected, convexly retreating from the suture to form a semi-circular sinus, then convexly antecurrent to a very slight anterior sinus at the constricted neck of the siphonal canal.

The columella is straight, curved to the left in the siphonal canal, and slightly thickened on the outside of its anterior end.