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
Mainly known from the Breck district and Surrey heaths, but also scattered along southern coastal counties.
A few records along the north coast (Clemons, 2003), including sea cliff grassland at West Pentire.
Habitat & Ecology
Larvae develop in root galls on Yarrow Achillea millefolium .
Abandonment of grazing, with consequent sward coarsening and scrub development.
Maintenance and restoration of coastal grazing schemes, ensuring not overgrazed.
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.