Pupillaea aperta, common name the mantled keyhole limpet, is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.

[1] The size of the shell varies between 23 mm and 50 mm.

Pupillaea aperta has a flattened shell with an aperture on the peak.

[2] This marine species occurs off Namibia to North Transkei, South Africa.

This Fissurellidae-related article is a stub.