Diodora galeata
NameDiodora galeata
Scientific NameDiodora galeata
Common NameHelmet Keyhole Limpet (or simply Keyhole Limpet)
FamilyFissurellidae
GenusDiodora
Speciesgaleata
Geographic DistributionPrimarily found in the Mediterranean Sea and adjacent Atlantic waters, including the Canary Islands and Madeira.
Shell Shapeconical
Average Size (mm)15
Identifying FeaturesKey identifying features include its cap-like shape, the presence of an apical keyhole-like opening (though not clearly visible in this specific image), strong radial ribs crossed by concentric growth lines forming a cancellate sculpture, and a distinctly crenulated or scalloped shell margin.
Raritycommon
Author CitationPhilippi, 1846
Description
Diodora galeata is a species of keyhole limpet, a marine gastropod mollusc belonging to the family Fissurellidae. Its shell is characterized by a low, conical, cap-like shape with a distinctive apical opening (keyhole). The surface is sculptured with numerous fine, radiating ribs intersected by concentric growth lines, creating a cancellate pattern. The shell margin is typically crenulated or scalloped, corresponding to the radial ribs. The specimen in the image is uniformly off-white to creamy white.
