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 very rare species found on the bark of various trees: Hazel Corylus avellana , Holly Ilex aquifolium and young Oak Quercus spp. In ancient, moist, open woodland. So far it is known only from three sites on Dartmoor (S. Devon) and three sites on the south-eastern and southern edges of Bodmin Moor, where it occurs on the trunks and branches of Holly and Hazel, but it may be somewhat overlooked. It is apparently endemic to Britain and Ireland, being otherwise known in Southern Ireland from Co. Cork. One of the Cornish sites has become somewhat overgrown and should be visited to assess any management requirements such as tree felling to allow greater light penetration.
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.