Cape keyhole limpet
NameCape keyhole limpet
Scientific NameDiodora calyculata
Common NameCape keyhole limpet
FamilyFissurellidae
GenusDiodora
SpeciesDiodora calyculata
Geographic DistributionPrimarily found along the coast of Southern Africa, from Namibia to the Eastern Cape, South Africa.
Habitatintertidal
Shell Shapeconical
Average Size (mm)Shell length typically ranges from 15 to 40 mm.
Identifying FeaturesThe most distinctive feature is the apical, keyhole-shaped opening (foramen) at the apex of the shell, which serves as an exhalant siphon. The shell surface has a cancellate texture due to intersecting radial ribs and concentric growth lines. The animal's mantle can sometimes partially cover the shell.
Raritycommon
Author Citation(Sowerby I, 1823)
Description
A marine gastropod mollusc, commonly known as a keyhole limpet, characterized by its conical shell with a distinctive apical opening. The animal's soft body, including its foot and tentacles, is visible extending from beneath the shell, adapted for clinging to hard substrates. It is typically found in intertidal and shallow subtidal zones.
