Large hyaline and translucent multispiral protoconch, 650 µm wide, 670 µm high, of 4.5 highly cancellated and convex whorls. Protoconch I of 1.1 whorls and 175 µm in diameter. The cancellation starts straight from the nucleus while the last whorl exhibits 2 weak keels before the onset of the protoconch. Teleoconch with 1 conspicuously convex whorl exhibiting an oblique shoulder immediately below a shallow suture and 10 strong orthocline axial ribs with interspaces slightly wider than the ribs. Spiral decoration of 20 spiral cords that become denser towards the shell's tail and forming inconspicuous tubercles at the crossings with the ribs. Aperture elongated and with a long anterior canal. The columella is smooth and sinuous. Shell cream-white, with a beige protoconch that is more intense at the apical whorls.

P. gibbera has a rather high (c. 800 µm) and broad larval shell of convex, distinctly and coarsely cancellated whorls. The axial sculpture of the postlarval whorls consists of broad, obtuse, rather distant axial ribs. The spiral sculpture consists of 3-4 major spiral lines, which cross the axial sculpture without forming knobs. The shell is brownish and glossy.

Shell rather solid, slender, a little nodulous, consisting of 3.5 postlarval whorls. The larval shell has 4 whorls and is about 800 µm high; it is brownish and sculptured by oblique axial ribs in the upper part of the whorls with an oblique reticulation below. The postlarval whorls are angulated, with a moderately deep suture and sculptured with distant strong axial ribs and three rather evenly spaced spiral lines on the penultimate whorl; on the body-whorl additional spiral lines appear below them. Subsutural zone well marked, furnished with spaced, curved growth lines. At the suture there is a rather strong spiral cord, separating the zone from the suture. The outer lip is distinctly constricted at the beginning of the siphonal canal, which is rather long. Parietal wall forming an angle. Colour of the adult shell very light brown-yellowish.
Dimensions of the shell: height 4.72 mm, breadth 2.40 mm; height of the aperture 2.16 mm, breadth 0.80 mm.
Remarks. This species has been included here, although its main distribution is in comparatively shallow water, because it resembles P. eurybrocha and because the name gibbera ms. of Jeffreys was placed by Sykes(1906: 181, with references) in the synonymy of implicisculpta Sturany, which is not the case. See under eurybrocha for differences between the two species.

Easily distinguishable from its congenerates by its characteristic protoconch

Pleurotomella gibbera is referred as a species of a rather restricted distribution from the Central and East Atlantic to the West and Central Mediterranean Sea
Coralligenous bottoms from 100 to 400 m of the Mediterranean Sea

Distribution. The central and western Mediterranean and NW Africa, lower shelf to upper bathyal. Only known from the material examined.