Pirimela
Pirimela is a genus of crab containing a single species, Pirimela denticulata. Description
Pirimela denticulata is a "small, pretty crab", up to  long and  across the carapace. Its colouring is mostly green, with mottling of brown, purple or red. The front edge of the carapace has three teeth between the eyes, two teeth around the orbits of the eyes and five teeth along either side. Distribution and ecology
Pirimela denticulata is found from the British Isles to Mauritania, the Mediterranean Sea, the Canary Islands, the Cape Verde Islands, and the Azores. It lives in burrows in sandy sediments, or on underwater vegetation, at depths of up to . Taxonomy
Pirimela denticulata was first described by George Montagu in 1808, under the name Cancer denticulata. It was later transferred by William Elford Leach to his new genus Pirimela, which contains only P. denticulata. A second species of Pirimela, P. princeps, is now considered to be synonymous with P. denticulata. References

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Portunoidea
Crustaceans of the Atlantic Ocean
Monotypic decapod genera