New Zealand Keyhole Limpet
NameNew Zealand Keyhole Limpet
Scientific NameAmblychilepas platyactis
Common NameNew Zealand Keyhole Limpet
FamilyFissurellidae
GenusAmblychilepas
Speciesplatyactis
Geographic DistributionEndemic to New Zealand.
Habitatintertidal
Shell Shapeconical
Average Size (mm)20-30
Identifying FeaturesKey identifying features include its oval, low conical shape, the prominent trefoil or figure-eight shaped apical opening, and the strong radial ribbing on the exterior surface. The crenulated margin is also characteristic.
Raritycommon
Author Citation(Finlay, 1930)
Description
The New Zealand Keyhole Limpet is a marine gastropod mollusk, characterized by its low conical, oval-shaped shell. A distinctive keyhole-like or trefoil-shaped opening is present at the apex of the shell, which serves for excurrent water flow. The exterior surface is sculptured with prominent radial ribs and finer concentric growth lines, giving it a somewhat cancellate texture. The shell margin is crenulated, reflecting the external ribbing. The interior is smooth and typically white.
