Shell size small for genus, adult size up to ca. 4.9 mm; fusiform, elongate. Suture slightly impressed. Protoconch paucispiral, -1.5-1.6 smooth whorls. Teleoconch of ca. 3.75 whorls. Axial sculpture absent, apart from very weak riblets on first whorl. Spiral sculpture of basal cords, ventrally ranging to just below adapical edge of columella. Outer lip slightly thickened, smooth, bearing only continuation of basal cords. Inner lip denticulate, with seven weak, equally spaced denticles. Columellar callus raised, clearly demarcated. Parietal callus weak. Columella with rim of merged denticles. Siphonal canal short, open, straight. Teleoconch whorls beige in colour, semi-translucent. Protoconch off-white, semitranslucent. Aperture and columella off-white. Operculum light brown, semitranslucent, with terminal nucleus. Holotype height 4.6 mm.

This species differs from Mitrella parvicosta in its lack of distinct axial sculpture, the position and number of denticles in the inner lip, the rim of merged denticles on the columella, the less shouldered whorls and the larger adult size. Mitrella fineti Poppe & Tagaro, 2010 differs in having a multispiral protoconch and more shouldered whorls.

New Caledonia: between Grande Terre and Ile des Pins, and Norfolk Ridge, alive in 445-650 m.