The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.
Range & Status
It occurs low on the shore to about 37m (attached by byssus or free-moving) from Africa to south-west England and the Channel Islands. Shells have been found in SA19, living animals in SA16 and SA18/VC1/VC2. A southern species distributes south to the Iberian Peninsula, into the Mediterranean and along the coast of Africa to Senegal.
I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.
The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.