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
Forming an adherent felty covering on rocks in the lower intertidal. Known with certainty in the British Isles only from the south coast of Britain (Cornwall and Dorset). Records from Ireland may need re-evaluation. Numerous records from the south coast of Cornwall, especially on the west coast of The Lizard. Only one post 1980 record, from Prisk Cove near Mawnan in 2005. Believed to be in decline.
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.