Shell variations amongst
the rough periwinkle

Along the Swedish coast, beach environments vary greatly, mosaic like. The rough periwinkle is found in most areas, but in different environments they can have varying appearances. These variations are most noticable in size, colour and shell pattern, aswell as shell form and thickness. Click on the picture above to see the different environments.

Rough periwinkle     Other names
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Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson