Description: A small, conical limpet with a single oval opening at the apex of the shell. It can be up to 4 cm in length. The shell is markedly ridged and usually white to grey in colour but occasionally can be yellow, orange or red. The mantle is thick, with wart-like papillae on the surface, and the body shape is oval, with a small head bearing two tentacles. The foot is surrounded by 30-35 tentacles which alternate between long and short lengths.

Habitat: Found under boulders and in overhangs on rocky shores, from low water mark to depths of up to 250 m.

Distribution: Found on all coasts of Britain and Ireland, except east coast of Britain.

Similar Species: Unlikely to be confused with any other species.

Key Identification Features:

• Small, conical limper with a single oval opening at the apex of the shell.
• Markedly ridged shell.
• Thick mantle covered with wart-like papillae.
• 30-35 epipodial tentacles.

Distribution Map from NBN: Diodora graeca at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Diodora graeca at iNaturalist World Species Observations database.

GBIF data for Diodora graeca

WoRMS: Diodora graeca at World Register of Marine Species. Accepted name: Diodora graeca (Linnaeus, 1758). AphiaID: 139951.

Classification: Biota; Animalia; Mollusca; Gastropoda; Vetigastropoda; Lepetellida; Fissurelloidea; Fissurellidae; Fissurellideinae; Diodora