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
This species lives and feeds on small algae growing between the tidemarks on exposed rocky shores. It is locally common between Newquay and Bude on the north coast of Cornwall and less common on the south coast, occurring between Portholland and Cawsand Bay. Elsewhere it is known from south Wales, the Channel Islands, the western coast of Scotland and the coasts of south and north Devon. Elsewhere in Europe it is known from the Atlantic coast of France.
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.