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
Always very localised in Britain, but has become increasingly scarce.
Reported from several localities in Cornwall: Swanpool (Clark, 1906), Downderry, Whitsand Bay (Willcocks, 1915; Keys, 1918), Looe Bay in 1919 by J.H. Adams, and Loe Bar by J.H. Keys in 1921 and R.T. Bannister in 1934. Re-discovered by Roger Booth west of Seaton in 1999 and by Paul Gainey between Loe Bar and Gunwalloe Fishing Cove in 2008.
Habitat & Ecology
Found on wet shingle or sand at the base of seacliffs with wet seepages. Also known from exposed riverine sediments in other parts of Britain.
Disturbance of coastal shingle and sand systems, including gravel-winning as well as coastal and flood protection works.
Much of the more sensitive coastline is now protected by SSSI designations. The Loe Bar coast is owned by The National Trust.
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.