Description: This limpet is widespread but less abundant than the common limpet Patella vulgata. It reaches around 6 cm in length and is grey-white on the outside with a white interior. The shell is a low cone with conspicuous ridges that project around the edge of the shell, and the apex is off-centre. There is quite often seaweed growing on the shell. The sole of the foot is an pale and even yellow-orange colour.

Habitat: Mid to lower shore rockpools. Seems to prefer exposed or semi-exposed coasts.

Distribution: Found on all coasts of Britain and Ireland.

Similar Species: Could be confused with the common limpet Patella vulgata, however the colour of the foot and the inside of the shell is diagnostic.

Key Identification Features:

• Shell is a low cone with conspicuous ridges.
• Inside of the shell is white.
• Sole of foot is an even pale yellow-orange.

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

iNaturalist: Patella ulyssiponensis at iNaturalist World Species Observations database.

WoRMS: Patella ulyssiponensis at World Register of Marine Species.