16 Patella pellucida. Length 10.4mm. Growth Stage 4 frond dweller (GS4f), on Laminaria. March 2014. Littoral. West Anglesey, Wales.

Left: shell exterior.
Right: shell interior.
Aperture outline almost circular (often a broad oval).
Pedal-retractor muscle-scar faintly visible (1).
Occasionally at GS4, as on this, the thicker adult growth may develop slight radial ribs (2).

Concise
Part 1, SHELL FORMS: 02 Patella pellucida. Growth Stage 2 (GS2). July 2012. Littoral. North Yorkshire, England. © P. Lightfoot.
Part 2, BODY & ANATOMY: 03 Patella pellucida. Growth Stage 3 (GS3). 2009. Sublittoral, Farne Islands, Northumberland, England. © P.Lightfoot.
Part, 3 HABITS & ECOLOGY: 04 Patella pellucida. Length 4.6mm. Growth Stage 3 (GS3). September 2016. Yorkshire, England. © P.Lightfoot.

Imprint

Photographic guide to the identification and biology of European marine invertebrates

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