It features a long, unconstricted base and a nearly equal-sided snout, which is angulated by a pronounced keel and adorned with regular fine spiral threads throughout.

On the penultimate whorl, there are about six such threads below the keel, separated by flat, broad intervals that are prominently scored with growth lines The colour of the shell is white under a yellow epidermis.

The spire is high, narrow, and conical, with profile lines interrupted by the straight-lined contraction of the shell between the keels of successive whorls.

Its edge retreats immediately to the left, forming a remote, deep, rounded sinus in the shoulder above the keel.

[3] This species occurs in the cold waters off Patagonia, Tierra del Fuego, the Falkland Islands and the South Shetlands.