Shell ovoid conic, solid, not depressed, white, apparently smooth and with a rounded periphery. Protoconch of near 1,75 whorls and of about 338 µm diameter, with a rough surface at the beginning, the rest being smooth, and presenting a thicker band near the beginning of the teleoconch which is well defined. Teleoconch of about 1,5 whorl, increasing slowly; the whorls are convex and smooth, the suture impressed; with magnification, it is possible to see in fresh shells that the dorsal surface is crossed by numerous spiral lines formed by tubercles; ventrally, it is less convex with a prominent cord near the narrow umbilicus. Aperture nearly rounded with a notch where the perumbilical cord ends. Dimensions: Holotype is 1.2 mm in height x 1.0 in diameter.
The specific name alludes to the small size of the shell of the present species.

This species is smaller and more elevated than the previous ones included in the genus. In addition, P. tornatica has a strong peripheral cord and no microsculpture, while the umbilicus is wider; P. skeneoides is larger, more depressed, the umbilicus is wider and the perumbilical cord is nodulous and delimits a wider infundibulum, even in those shells which have a smaller umbilicus; furthermore, the shell has no microsculpture. P. finalis is larger, with axial ribs and denser microsculpture.

Distribution: Known from Ivory Coast, Ghana, and Angola. Type locality: Miamia, Ghana, in 35-50 m.