Thick keyhole limpet
NameThick keyhole limpet
Scientific NameFissurella crassa
Common NameThick keyhole limpet
FamilyFissurellidae
GenusFissurella
Speciescrassa
Geographic DistributionSoutheastern Pacific Ocean, along the coasts of Chile and Peru.
Habitatintertidal
Shell Shapeconical
Average Size (mm)Typically ranges from 50 to 80 mm in length, but can reach up to 100 mm.
Identifying FeaturesLarge, thick, oval shell with a low profile. The most distinctive feature is the prominent, keyhole-shaped apical foramen. The exterior shows concentric growth lines, and the interior often has fine radiating striae. The shell margin is thick.
Raritycommon
Author CitationLamarck, 1822
Description
A large, thick-shelled keyhole limpet, characterized by its oval, flattened shape and a distinctive keyhole-shaped opening (foramen) at its apex. The exterior is typically brownish with concentric growth lines, while the interior is smooth and whitish, often with radiating lines.
