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
Most of the British population is in south-west England, including Lundy.
Has been found to be widespread along rocky sea cliffs all around the Cornish coast.
Habitat & Ecology
Associated with seepages or streamlets on coastal cliffs and rocks. The biology is
unknown, but the larvae presumably live in mud by the seepages.
Coastal defence works and water extraction in vicinity of sites.
The Cornish sites are mostly on National Trust land and within SSSI.
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.