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
Scattered records from around the coast of Britain suggest this species may be widespread but under-recorded. Discovered as a species new to Britain in 1976 when it was found on the Isle of Wight and in East Cornwall on the 21st and 22nd September respectively (Oliver & Sutton, 1982).
At present known only from seven sites on the south coast of the Cornish mainland:
Higher and Lower Predannack Cliffs and Gew Graze on The Lizard; near Sheviock Wood on the River Lynher; near Lansallos in east Cornwall; and two islands on the Isles of Scilly, Nornour and St. Mary' s.
Habitat & Ecology
Found under stones embedded in the earth and vegetation of the splash zone of the sea shore at salt marshes, sea cliffs and shingle banks.
Four of the sites are within areas designated for nature conservation.
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.