Shell small (<2.0 mm), of flattened aspect, bicarinate and widely umbilicate; formed by 4 whorls of quick growth. The protoconch has more than 1,75 whorls (almost 2), placed at a slightly higher level than the teleoconch, measuring 340 µm in diameter and having two distinct phases; the first is completely smooth and the second is completely covered by a grainy surface of regular size; there is no labial varix. Teleoconch with just 1,75 whorls, bicarinate with two small keels, one peripheral and the other basal, the latter most expanding the circumference of the shell. Ornamentation formed by spiral cords in zigzag, axial ribs and cells of different shape in the interspaces between cords.
On the adapical part, initially 5 zigzagging spiral cords can be observed that cross with axial striae to form rounded cells in the interspaces between the cords; on the last whorl the cords, numbering 23 between suture and peripheral keel, have small granules that give a characteristic appearance. The space between the keels is concave and on it the spiral cords are crossed by fine sinuous axial ribs, forming cells in the interspaces. Base convex, with axial ribs that extend from the basal keel on the edge of the umbilicus and rounded cells over its entire surface. Umbilicus wide and deep, allowing the previous whorls to be seen; on the umbilical wall there are some spiral cordlets and marked growth lines. Aperture triangular, outer lip expanded laterally, with two internal angles corresponding to the carinae; parietal area covered by a thin callous coating; columella arched, thin- edged, not reflected. Dimensions: the holotype measures 1.64 mm in maximum diameter.

The characters of this species which allow us to distinguish it from other species of its group are the fine granulation of the end of the protoconch and the concavity of the space between the two carinae. From Anticlimax reinaudi spec. nov. it also differs in lacking axial folds on the space between the carinae. A. bicarinata spec. nov. differs in having a flatter spire and in the greater prominence of its carinae.

Only known from Fiji, its type locality, Stn. DW1334 and DW1333. Habitat: Bathyal species dredged at 200-257 m.