Shell ovoid-conic depressed, relatively fragile, whitish, without dorsal sculpture and with a rounded periphery. Protoconch hypertrophic of about 2 whorls, with a rough surface at the beginning, later becoming smooth of about 340 µm diameter; there is a thick axial rib at the end of the protoconch. Teleoconch of 1,5 whorls, increasing not very rapidly; whorls convex, smooth, with an impressed suture. At the base, a strong nodulous cord delimits a wide umbilical infundibulum. The nodules of this cord continue into the infundibulum via small ribs. The microsculpture consists only of prosocline growth lines. In some shells the small nodules on the basal spiral cord, become fine folds outside of the umbilicus, but only for a short distance. Aperture rounded with a continuous and sharp peristome, in contact with the previous whorl for only a short distance, and somewhat extended dorsally. Dimensions: Holotype is 1.3 mm in diameter and 1.2 in height. There are shells from populations with larger size which can reach 3.0 mm in maximum dimension (diameter).
Animal: Cephalic tentacles elongate, close proximally, finely ciliated and a little flattened, somewhat wider at the extremes, and with some white spots. Snout elongate and bilobed, buccal bulb reddish, visible by transparence. Penis coiled and behind the head. The branchiae are large and visible when the animal is moving. There are two pallial tentacles with a white spot at their base arising from the right margin of the mantle skirt. Around the eyes, there are some white opaque blotches. Anterior end of the foot very flexible and elongate. No metapodial tentacle. Wide opercular lobes. Operculum: fine, transparent, paucispiral and with a subcentral nucleus.

We have included in this taxon shells which are depressed along with others with a more elevated profile. Usually, the depressed shells are larger while the highest are smaller in diameter. We also found other differences in the umbilicus: wide in some shells and narrow in others. Even the protoconchs in the smaller and more elevate shells appear to be also more elevate than in the wider shells.
These differences could be an ecological adaptation to different habitats, though we have found shells of both morphs sympatrically in some places like Congo and Angola. The other characters were similar and thus, lacking soft parts to make a more complete comparison, we provisionally consider all these morphs conspecific. P. skeneoides spec. nov. can be differentiated from P. tornatica, because the latter species has a concave base and a peripheral keel. It can be differentiated from P. minutissima because the latter has a narrower umbilicus, and strong perumbilical cord; other species of the genus in the studied area have axial sculpture.

Type location: Luanda, Angola. Distribution: Known from Mauritania to Angola. Two specimens (MNHN) were collected under a rock buried in sand (S. Gofas, pers. comm.).