Arctica islandica
Common. Distributed from Norway south to the Bay of Biscay.
Arctica islandica
The map provided here shows the distribution of the species based on Conchological Society data held by the National Biodiversity Network (NBN). See terms and conditions.
The following datasets are included:
- Conchological Society of Great Britain & Ireland: marine mollusc records
Open an NBN Atlas interactive map of this data in a new window.
Shallow burrower in muddy sand where it feeds by filtering phytoplankton.
In the southern part of its range live animals are restricted to deeper waters but to the north it can also be found intertidally.
In one report from the Journal of Conchology, Rendall (1954) indicates that large, live specimens could be found at the extreme low-water mark in St. Catherine’s Bay, Stronsay, Orkney (follow the link to read the original report). By following the tideline and walking slowly shorewards, Rendall observed a, "regular and graduated decline in size as one approached the sides of the bay, until at last I was picking up complete specimens scarcely the size of a shilling". The author also noted that at, "the south side of the sands Cyprina islandica was closely associated with Dosinia lupinus, which also occurred there in considerable numbers". Razor shells, otter shells and the ocean quahog were all part of the diet for islanders. Interestingly, he reported that even larger individuals were said to be taken from Linga Holm, an uninhabited island at the mouth of the bay.
- Pallial line not indented with a pallial sinus
- Crenulations on hinge plates in from of the anterior cardinal tooth.
Taxon details available from MolluscaBase (AphiaID 138802):
Arctica islandica (Linnaeus, 1767)
For the species account provided by Marine Bivalves of the British Isles click here.
The UK NBN Atlas entry for the species can be accessed via this link.
Rendall, R. (1954). A survey of some Orkney beaches. Journal of Conchology, 23(12), 390 - 394pp. Available at: https://www.biodiversitylibrary.org/page/63093306
Very solid shell up to about 13cm in length. The surface is sculptured with numerous irregular fine concentric raised lines. The outside of the shell is white, yellow or brown. The inside is white, soemetimes with a pink tint. The pallial line is not indented with a pallial sinus.