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
Widely scattered localities across southern England.
Found by Ray Poulding on St. Mary' s (Isles of Scilly) and along the rivers Hayle, Helford, Fal and Truro.
Habitat & Ecology
Mostly known from estuarine sites and intertidal rocks, and possibly associated with
Coastal developments, especially loss of natural shore-lines.
Some of the habitat is protected by SSSI and/or planning regulations.
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.