Shell: Medium sized Ilanga species (H up to 5.7 mm, W to 9.2 mm), wider than high, shape conical, thin-shelled, glossy; spire rather elevated to moderately depressed, height 0.54-0.66*width, 1.6-2.0xaperture height; periphery subangulate; umbilicus broad, deep. Protoconch ca. 300-320 µm wide, 1.25 whorls, rounded, with about 3 weak spiral cords and a straight, very slightly expanded terminal lip. Teleoconch up to 4.4 moderately convex whorls with weak subsutural ramp on first whorls,vanishing on last whorls; early teleoconch whorls with 5 spiral cords; penultimate whorl with strongly granular subsutural cord; last whorl with about 4 weak, thin spiral threads on abapical half; weak growth lines on last whorls. Suture impressed, not canaliculated. First teleoconch whorl convex, sculptured with P2, P3 and P4 appearing immediately; cords more or less equally spaced, P2 slightly stronger; P1 appears on last third of first whorl, thinner than other cords;, very fine, weakly prosocline axial threads between cords.
S3 appears on second teleoconch whorl; distance between P1, P2 and P3 much greater than distance between other cords; wide, low axial pleats appearing between P1 and P2; other cords more or less smooth. On third whorl, pleats transforming into strong nodules, making a strongly nodular cord and giving a coronate shape to subsutural area; P2 weakening and moving abapically, P3, S3 and P4 still visible; all cords low, smooth. On last whorl, nodular subsutural cord obsolete and finally vanishing, leaving a smooth surface except four abapical, smooth, low cords. Aperture subcircular; peristome incomplete; outer and inner lip thin; inner lip with basal thickening against umbilical rim. Base moderately convex, smooth on outer part, with 30-40 axial pleats on intern third or half, reaching umbilical rim. Umbilicus broad (diameter 24-27% of shell width), central, with perspective to apex, with angulate rim, possibly with a thin smooth spiral cord; vertical wall with about 6 smooth spiral cords.
Colour: Teleoconch light brownish white, last whorls with brown zig zag lines, making distinct subsutural and peripheral areas with chevron shaped lines; base lighter, possibly with zig zag pattern; protoconch whitish.
Remarks. The single Tongan specimen is a little more depressed and has eight spiral cords inside the umbilicus.

Vanuatu, 79-260 m, lv at 79-150 m; off southern New Caledonia, depth unknown (Marshall, 1999). Tonga, dd at 309-400 m.