Shell rounded irregularly, depressed, relatively solid, whitish, the outer border sharp and with an irregular profile. Protoconch of 1,75 smooth whorls, and about 380 µm diameter; there is a thick rib at the start of the teleoconch. Teleoconch of about one whorl or a little more, increasing rapidly, dorsally with 1-2 cords at the beginning which increase to 4-5 at the end; they are not prominent and in the last whorl are crossed by about 51 curved prosocline and irregularly disposed axial ribs; ventrally slightly concave, umbilicus amply open, making the previous whorls visible. Two spiral cords are present, one near the peripheral border and the other a little below, but far from the umbilicus. There are also numerous very variable axial ribs. With magnification very small irregularly disposed tubercles can be seen between the axial ribs. Aperture ovoid, outer lip sharp. Dimensions: Holotype is 1.6 mm, in maximum dimension (diameter). The name alludes to the apparent similarity with D. irregularis.

The characters of this species are very different from most of the others of the area of study. The most similar with an irregular peripheral keel are the following:
D. irregularis has a similar shape but has numerous differences (see above) in the axial and spiral sculpture, microsculpture and size of the protoconch. Because of these numerous differences we have described this species in spite of the scarce material available.
D. nodulosus is dorsally strongly nodulous, and the microsculpture has fewer tubercles.

Distribution: Known only from Guinea Conakry, Ghana and Angola. Type locality: Off Luanda, Angola, dredged at 60 m.