Shell large, up to 44.5 mm in length, broadly ovate, weakly angulate, shouldered, with 6-8 broad, high, rounded axial ribs, crossed by 5 high, longitudinally grooved primary spiral cords, occasionally deeply excavated between each pair of cords. Intersection of axial ribs and primary spiral cords forming low, broad knobs. Aperture broadly ovate with low denticles within outer lip. Siphonal canal short to moderate in length, 13-29% of total shell length, broadly open.
Radula ergalataxine, of three-dimensional type, consisting of a narrow, long central cusp, a very short, narrow, lateral denticle on each side, a broad, moderately long lateral cusp and occasionally a few low marginal folds. Lateral teeth sickle shaped, broad.