Description of the holotype, an empty shell, small-sized, fragile columbellid, rounded, raised spire with rounded apex, pointed base with open canal, regular spirally ribbed sculpture, height 6.31 mm, width 3.10 mm (H/W = 2.0).
Protoconch developed in single stage, a nucleus, followed by a raised smooth, convex, one whorl with fine irregular growth lines and fine spirally etched lines, suture shallow. Lip at interface to teleoconch not thickened, orthocline, interface to teleoconch clear by change in surface sculpture. Exposed height 0.97 mm, maximum width 0.85 mm.
First teleoconch whorl convex, raised, with rounded shoulder. Sculpture regular spiral ribs and grooves that slowly grow in strength and size, grooves about 30% of thickness of ribs. Number of ribs grows from 15 to 20 on first whorl. Suture quite shallow. Second (penultimate) whorl with 20-21 spiral ribs. Numerous fine growth lines visible under magnification. Shoulder absent, suture shallow. The body (third) whorl with 21 spiral ribs above the suture and 31 ribs below the suture. Suture on the body whorl well below the periphery. Growth stages irregular and clear on the full teleoconch. Top angle of spire about 30°.
Opening trapezoidal, 45% of total height, pointed at anal end with thick parietal and labial callus. Columella curved, S-shaped, concave in central part ending with a notch at the start of the siphonal canal. A thin columellar callus clearly demarcates transition to external sculpture. Siphonal canal open and straight. Lip pointed yet blunt, slightly prosocline, strongly raised at anal end, thickened, no labial teeth developed. Inside smooth.
Colour of the shell cream white, periostracum light olive green. Shell height up to 6.5 mm. Only adult specimens show the raised lip at the anal end. Little variation in outline and sculpture.

Type locality.-
MAURITANIA: Banda Mound Complex, POS346 / GeoB 11564, 17°6459 N - 16°6665 W, 442 m, 7.1.2007, box core in coral rubble with silty mud.
Distribution.-
The species is only known from DWC habitats off Mauritania, 17°-21° N, in 414-560 m.

Placement of the species in Zemitrella is based on the shell morphology: raised smooth outline, a fine radial sculpture, simple smooth protoconch. The genus is widely developed in the Indian and Pacific Oceans with a large number of species from New Zealand and some from South Africa. Our species is very similar to Z. benthicola from New Zealand; the latter has a coarser spiral structure. It is the first Zemitrella to be described from the Atlantic.