Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Cornish Red Data (2009)

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.

Megatrema anglicum

Range & Status

This warm-water species of barnacle is found growing around the ' calyx' of the solitary Devonshire Cup-coral Caryophyllia smithii , from low water to about 80m depth. Its geographical distribution is much more restricted than that of its host which ranges from southern England to Shetland. The barnacle and coral combination is only found on the southern coasts of England and south Wales from Sidmouth, Devon, to Pembrokeshire, and in the extreme south-west of Ireland. Elsewhere it is found from Roscoff in Brittany south to the Mediterranean, Madeira and the Cape Verde Islands.


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.