Shell small, about 12 mm. in length, moderately heavy, conical and elevated. Base oblong-ovate. Slopes straight. Apex a little in front of the middle, pierced by a long-oblong, almost parallel-sided orifice, about 1.5 mm. in length. Sculpture consists of alternately larger and smaller radiating ribs crossed by concentric raised threads which form small nodules where they intercept the ribs. Shell unicolored a light orange-buff. Margin strongly crenulated, the denticulations being in pairs. Inside color white or cream, the sculpture of the outside showing through. Internal callus of the orifice sharply truncated behind, the same color as the rest of the inside. Muscle scar rather deeply impressed.

Type location: Itapema, Sancta Catharina, Brasil. This is an exceedingly rare species; the only specimens seen are four without data and included with specimens of D. cayenensis.
Range and Records. Known only from the type locality.