36 Patella pellucida. Length 10.9mm. Growth Stage 5 holdfast dweller (GS5h). March 2017. West Anglesey, Wales.

The exterior surface of holdfast dwellers is less smooth than on frond and stipe dwellers and, on this one, is partly coated with epizoic animals . As usual, the juvenile growth is mainly free of epizoa.
This GS5 shell has acquired a thickening interior layer with a distinct pedal-retractor-muscle scar (1) and mantle-attachment scar (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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