Close up of girdle and valve sculpture. Note the elongated shape of the granulations on the valves
<em>Acanthochitona crinita</em> (Pennant, 1777)
Photograph taken 27th September 2007 on wst coast of Ireland
Occurs from Norway to the Mediterranean and Adriatic seas [GBIF map]. It is found all around the coasts of Britain and Ireland and is not uncommon. While it sometimes occurs in very high densities it more generally found in relatively low numbers.
Lives on the underside of rocks and boulders usually lightly embedded in sand or gravel. It feeds by grazing material from the rock surface using its radula. Most common in the low shore or shallow subtidal areas but can occur to a depth of 50m.
- Acanthochitona fascicularis has densely packed round granulations on the valve surface and a wider girdle.
- Relatively wide girdle with eighteen conspicuous tufts of colourless bristles.
- Coarse granules on the valves which are tear-drop shaped or oval.
Size: Up to about 34mm long. Shape: Very broad girdle with the shell making up 40-50% of the width. Valves are relatively flat, with a very slight keel.