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Taxonomische classification
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Knapp in Murray, 1857

Description (shell):
Shell like that of Patella ulyssiponensis in shape and sculpture, usually smaller and narrower anteriorly; a flattened cone (apical angle approx. 120°) with fine radiating ribs (P. intermedia-drawing).

Size:
Up to 30 x 25 x 12 mm.

Colour:
Distinctive orange-brown marginal rays on inner surface, the central part yellow.

Animal:
Foot dark olive or black, pallial tentacles chalky white; body otherwise similar to Patella vulgata .

Habitat:
On exposed rocky shores only, from MHWN to MLWN, prefers vertical surfaces.

Distribution:
A Mediterranean species reaching its northern limit on shores of south-west England and Wales; rare on west coast of Ireland. Probably not in the North Sea.

Patella intermedia