Shell up to nearly 5 mm, definitely cyrtoconoid, solid, with about 2 protoconch whorls and 7 to 7,5 teleoconch whorls. Protoconch narrow and styliform, easily broken off, the first whorl with a frosted surface, the following with one well-defined keel appearing progressively and running at about two-thirds of the whorl, closer to the adapical suture, and a less pronounced one situated more abapically; both more or less connecting to the start of the beaded cords on the first teleoconch whorl. Limit protoconch-teleoconch not very distinct. Sculpture of teleoconch composed of two spiral cords, approximately as broad as the intervening space, crossed by axial ribs which form very distinct beads at their intersection with the cords. On the first teleoconch whorl, the abapical cord is markedly more prominent than the other one and overhangs the suture of the following whorl. On the following whorls, the adapical cord progressively takes over as slightly thicker. On the last whorl, the beads of the adapical cord become elongated in the axial direction and, on the section preceding the aperture of adult specimens, this cord tends to split and form two contiguous rows of beads. The abapical part of the body whorl bears one thick beaded cord in prolongation of the suture and another one, flatter and not distinctly beaded, in the intervening space between this and the siphonal canal. Aperture oval, with a broad and short siphonal canal and a smaller channel at the opposite end. Adult shells have a rounded, but not thickened edge to the outer lip. Colour white to very pale tan.
Animal essentially like in D. concatenate but markedly smaller in relation to the shell and with cephalic tentacles broader and flatter.

This species is only represented by two specimens, but is clearly separable from sympatric D. concatenata by having a pale, nearly white shell, by the cyrtoconoid, rather pupoid teleoconch which is markedly broader at the same height, and by lacking the paired keels on the later larval whorls. Like D. concatenata, it has been observed to lack the granular masses behind the eyes and beneath the operculum.

Ceuta. Straits of Gibraltar.