Shell medium sized, uniformly dark brown or black, subsutural cord prominent, midway on the concave shoulder slope. Protoconch of 2 1/2 smooth, rounded whorls. Sculpture of narrow axial ribs crossed by spiral cording that increases in strength toward the base. Sinus deep, laterally directed, parietal callus of mature speci¬mens projecting down to nearly seal the entrance to the sinus. Lip edge not greatly thickened, stromboid notch shallow, lip preceded by a thickened rib 1/6 turn back, anterior canal short, not deeply notched. Operculum leaf shaped, nucleus terminal. Radula of the elbow type, marginal teeth only, with an inner flange, outer profile with a 90° curve close to the base of the tooth.

The shell differs from that of subgenera of Crassispira in having a deep, laterally directed sinus, the parietal callus curved and projecting down to nearly seal the entrance.