Diagnosis: Shell of moderate height, whorls shouldered, periphery somewhat below mid-whorl, base flattened. Sculpture primarily of spiral cords, rounded in profile; intervals with lirae, some of which may develop into intermediary cords. Axial sculpture weak, comprising fine prosocline growth-lines and faint subsutural pliculae. Colour variable, mottled with flecks and blotches.
Description: Shell of moderate height (L/D = 0,73-0,75), trochoid-turbiniform; whorls shouldered, periphery somewhat below mid-whorl, base flattened; teleoconch of up to 4 whorls. Sculpture primarily of spiral cords, 4 to 5 in number; fine on first whorl becoming stronger with growth; rounded in profile; intervals inconsistently lirate, some lirae may develop into intermediary cords; cords becoming finer and more close set below periphery, but 1-2 cords bordering umbilicus broad. Axial sculpture weak, comprising fine prosocline growth-lines and some faint subsutural pliculae which scarcely if at all notch shoulder cord. Umbilicus deep, moderately wide; interior with 6-8 spiral cords of varying strength; margin slightly angled and weakly pliculated by growth-lines. Aperture subcircular, peristome incomplete; outer lip prosocline, weakly notched; interior nacreous.
Protoconch: Not examined under SEM in order to preserve colour pattern of only two specimens available. Evidently similar to other species, diameter 460-500 µm.
Colour: Variable, ground colour yellowish-white, apex pale yellow to pale pink; holotype with reddish-orange axial flecks and axial blotches above the periphery; paratype similar, but pattern dark orange-yellow to brownish-orange with deep brown flecks on cords; both specimens with strong pink/green iridescence. Dimensions: Holotype, length 4,5 mm, diameter 6,1 mm; paratype, length 4,8 mm, diameter 6,4 mm.

Somewhat similar to I. whitechurchi (Turton, 1932), but with weaker axial sculpture and fewer, broader spiral cords above the periphery. Whorls more rounded than I. platypeza sp. n. Superficially resembling a juvenile Spectamen ruthae, but radula and external anatomy quite different.

South-Africa. Known only from Natal south coast, living at 45-70 m, in fine sand.