Shell small, conical, relatively thick-walled, with stepped spire. Color nacreous glossy white. Protoconch (-1 whorl) prominent, bulbous, microporous. Teleoconch sculpture (except whorl base) consisting of very strong spiral cords (only a single one visible on early whorls), with widely spaced axial threads and very fine spiral threads between spiral cords and suture; spire whorls bearing two visible spiral cords: a weaker subsutural one, and a stronger supramedian that produces a distinct keel; axial threads prosocline above median keel and opisthocline below it, creating a continuous sigmoid pattern. Whorl base sculptured by 6-8 spiral cords; axial threads between cords. Whorls strongly concave between cords and suture, with overall angular shell profile. Suture obscured by subsutural carina. Aperture quadrangular, with a strong columellar tooth and three labral sinuses: a deep subsutural sinus; a shallow sinus in peripheral part of basal region of aperture; and a very shallow sinus in palatal region of aperture, corresponding to the carina. Umbilicus imperforate, resulting in a strengthened and sinuous columellar region. Measurements (in mm): 6,25-7,5 whorls, H = 3.25 ± 0.15; D = 2.7 ± 0.09; h = 1.34 ± 0.44; d = 1.16 ± 0.12.

Type locality: Valorous Expedition, North Atlantic, 1450 fathoms (ca. 2650 m depth) (Jeffreys 1876).
Distribution: Morocco, Cape Verde, off USA to Brazil, ca. 80-3700 m depth (Jeffreys 1885; Rosenberg et al. 2009). In Brazilian waters: off Pernambuco state, ca. 640-1235 m depth (Watson 1879); off Cabo de Santa Marta, Santa Catarina state, and off Tramandai, Solidao and Bojuru, Rio Grande do Sul state (Rios 2009). New occurrence: Southeastern Brazil, from Espirito Santo to Rio de Janeiro, 295-3450 m depth.