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
This barnacle is a Boreal-Arctic, cold water species found from low water spring tide level to about 150m depth, but commonest at around 15-30m. It ranges from the Celtic Sea/Somerset coast of the Bristol Channel to Shetland, and is also present in the North Sea from East Anglia northwards. It is at the extreme southern limit of its distribution range in Devon and Cornwall, and there are few recent records. It has recently been recorded from the south-east of Cornwall (1993) and in the Fal Estuary (1986). Southward (2008) states that it is no longer found in the English Channel.
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.