Purpuradusta microdon is species of tropical sea snail, a cowry, a marine gastropod mollusk in the family Cypraeidae, the cowries. This species lives in the Indo-Pacific oceans. The shell of this cowry closely resembles that of Purpuradusta minoridens. Subspecies \n* Purpuradusta microdon microdon (Gray, 1828) \n* Purpuradusta microdon chrysalis (Kiener, L.C., 1843)