- A limpet which has an aperture at the apex of the shell, sometimes extending to the margin.
More example sentences
- Family Fissurellidae, class Gastropoda
- The giant keyhole limpet is a ‘primitive’ snail closely related to the abalone.
- Cayenne keyhole limpets are easily identified due to the keyhole-shaped orifice at the apex of the shell.
- Unlike other limpets, most keyhole limpets have a small hole in the top of their shell.