Protoconch: smooth, globular, strongly hyperstrophic. at about 135degree angle to teleoconch axis; embryonic whorl not exposed, suture hidden or only small part of suture exposed; number of whorls not ascertained; Protoconch 480-520 mu; with weak peritreme. Protoconch umbilicus completely covered by thin callus, extending between first TW and anal keel. Glassy or milk-white; area before protoconch lip and callus tan.
Teleoconch: slender cone-shaped. base acutely angled; 3.1-3.8 mm at 4 1/2 lo 5 1/10 whorls, spire angle 30-34degrees. Pattern of regular spiral and weaker axial ribs, intersecting at slightly oblique angles to form strong nodules. Spacing of the axials very regular, with ca. 21-24 on fourth whorl. Exposed upper part of earlier whorls with 3 spiral ribs (middle one weakest, lowermost strongest), joined (below the uppermost) by a weak additional rib(s) at about 3,5 to 4,5 * TW . Upper point of whorl attachment at a recessed, fourth spiral rib, partly covering it. On body whorl, this rib, and one of almost equal strength immediately below it, forming double keel at outer base. Somewhat concave basal area with
1 or 2 spiral threads and 2 relatively smooth ribs surrounding open, funnel-shaped umbilicus. Coloration: yellowish to dark tan.
Animal: unknown.This form can be recognized by its pattern of three nodose spiral ribs on the exposed part of the teleoconch whorls, combined with an open umbilicus.