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 western bias in England, Wales and Scotland and in eastern Ireland post-1960; appears to have been more widespread before1960. Because of difficulty in identification using early keys, its national status is unclear.
Very widespread in Cornwall, especially in the wooded valleys.
Habitat & Ecology
Occurs in damp woodland and marshes from May-September.
Drainage and pollution.
Many sites are on National Trust land.
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.