oblong keyhole limpet
Nameoblong keyhole limpet
Scientific NameDiodora oblonga
Common NameOblong Keyhole Limpet
FamilyFissurellidae
GenusDiodora
Speciesoblonga
Geographic DistributionEastern Atlantic Ocean, including the Mediterranean Sea, and West Africa (e.g., Canary Islands, Cape Verde).
Habitatintertidal
Shell Shapeconical
Average Size (mm)20-30
Identifying FeaturesIts most distinguishing features are its oblong-oval shape, low conical profile, and the characteristic oblong keyhole-like opening at the apex. The shell surface is sculptured with strong radial ribs and concentric growth lines. The mantle often extends slightly beyond the shell margin.
Raritycommon
Author Citation(Menke, 1843)
Description
The oblong keyhole limpet is a marine gastropod mollusk characterized by its low, oblong-oval shell and a distinctive keyhole-shaped apical opening. Its shell exhibits a textured surface with radiating ribs and concentric growth lines, often displaying a purplish-brown coloration. It is typically found adhering to rocky substrates in intertidal and shallow subtidal zones.
