Shell rounded, depressed, fragile, whitish, with a rounded peripheral border. Protoconch of a little more than 2 whorls, smooth, increasing rapidly, of about 590 µm diameter. As the start of the teleoconch is not well defined, this size could be erroneous. Teleoconch of about 17: whorls, dorsally convex, with a few prosocline threads in evidence. With magnification can be seen growth lines and very small spiral lines of tubercles between them; ventrally there is the same microsculpture and a well-evident spiral cord closer to the peripheral border. Umbilicus wide, showing the previous whorls. Aperture ovoid, outer lip sharp and extended dorsally. Dimensions: Holotype is 2.7 mm in diameter.

The species is illustrated in TRYON , and it is perfectly concordant with the shells we have illustrated here. It has some resemblance to Tornus europaeus (De Stafani) from the Pliocene of Astigiano (see FERRERO & MARLINO, 1992) ADAM & KNUDSEN (1969) mention the similarity of this species with D. costulatus. The differences with this species are the following: D. costulatus is larger, more depressed, the spiral cord at the base is closer to the periphery and the axial ribs and microsculpture less evident. D. radians is smaller and its axial sculpture stronger.

Distribution: ADAM & KNUDSEN (1969) refers to Senegal and Principe Islands as its range. We enlarge it to Ghana, Congo and Angola. Material examined: Senegal: 3 s, Ngazobil (MNHN). Ghana: 2 s. Cape Three Points, 35-60 m (CER). Congo: 5 s, Pointe Noire T2 (CPH); 7 s, Pointe Noire (CPH). Angola: 20 s, 50 j, 10 Kms S of Ambrizete, prov. Zaire, litoral (MNHN); 5 j, Barra do Dande, Bengo, subtidal (MNHN); 1 s, Corimba, 0-1 m (MNHN); 73 s, 4 j, Corimba, Luanda, 10-20 m (MNHN); 88 s, 57 j, Bango, Ambrizete, 07°20.19'S 12°55.09*E, in beach (MNHN); 11 s, 32 j, Faro, Ambrizete region, 07°17.49S 12°53-05E (MNHN); 6 s, Luanda, 80-100 m (CER).