A limpet which has an aperture at the apex of the shell, sometimes extending to the margin.
Family Fissurellidae, class Gastropoda
Example sentencesExamples
- Cayenne keyhole limpets are easily identified due to the keyhole-shaped orifice at the apex of the shell.
- The giant keyhole limpet is a ‘primitive’ snail closely related to the abalone.
- And at the cutting edge of scientific medicine today, extracts from keyhole limpets are playing an important part in the development of vaccinations and treatments for skin cancer.
- Unlike other limpets, most keyhole limpets have a small hole in the top of their shell.
- This is the only keyhole limpet collected from these rocks, and it was found with other rocky intertidal snail shells such as whelks and top shells.