Mangilia thalycra Melvill, J.C. & R. Standen, 1897, "1896" (original combination) Iredalea thalycra is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.

Its colour is white, banded with ochre.

The shell contains 7 gradate whorls, longitudinally stoutly ribbed.

The outer lip is slightly thickened.

[1] This marine species occurs off the Loyalty Islands