56 Patella pellucida. Shell length 11.9mm. Growth Stage 5 holdfast dweller (GS5h) September 2014. North Yorkshire, England.

56 Patella pellucida. Shell length 11.9mm. Growth Stage 5 holdfast dweller (GS5h) September 2014. North Yorkshire, England.

1: distal face of the horseshoe-shaped pedal-retractor muscle is white, as usual on adult holdfast dwellers. On all juveniles examined, and on some adults on fronds and stipes, there is a chestnut band on the 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.