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
A rare species in Britain and Ireland, with many records based on drift material. An
unmistakable species which has been recorded attached to rock in shallow subtidal water. Specimens have been recorded from three Irish counties, Sussex, Devon, Cornwall and the Channel Islands. Its range extends south to the Mediterranean and Canary Isles. This may now be extinct in mainland Britain (Brodie, 2008 pers. comm.)
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.