14 Patella pellucida. Juveniles, Growth Stage 3 (GS3). Littoral. Largest, length 6.7mm, from Llŷn, N. Wales, April 1969. Others, shortest length 3.2mm, from Aberdeen, Scotland, 1971.

Interiors of juvenile shells.
Iridescent blue hyphens, visible through the nearly transparent shells, increase from two or three rows at the start of GS3 and increase to about eight at its end when about 7mm long.
The four smaller shells show a faint, thin, whitish, horseshoe-shape scar that marks the former position of the pedal-retractor muscle.

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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