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 large (to 30cm) intertidal species which is epiphytic on the holdfasts of small perennial algae, occasionally on hard substrata, on moderately sheltered shores usually near extreme low water. Very rare, confined to the extreme south-west of the Britain. Described as rare in Dorset but common in the Isles of Scilly and the Channel Islands. There is some evidence of 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.