Dog cockle
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| Dog cockle | ||||||||||||||
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The dog cockle, Glycymeris glycymeris, is a coastal bivalve of European waters. despite the name, it is not closely related to the Common cockle.
The dog cockle is a burrowing animal, living in shelly gravel at depths up to 100 m.
The shell, which reaches 6.5 cm in length, is thick and almost circular. The anterior hinge line curves more steeply downwards than the posterior. The shell varies in colour, being brown, yellow or a light purplish-red in colour. It can be uniformly coloured, or it can show irregular, concentric zigzags on a cream background. The periostracum is dark brown and forms a broad band around the shell margin; it is velvety in texture. The inside of the shell is normally brown within the pallial line. The inner surface of the shell has 6 to 12 teeth on either side of the beak.
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