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.

Nepinnotheres pinnotheres - Pinna

Range & Status

A parasitic species found in the mantle cavity of various lamellibranchs such as mussels and oysters from the inter-tidal region to 100m depth. Also found in the branchial chambers of tunicates such as Ascidia mentula and Ascidiella aspersa . A scarce, south-western species, but also occasionally in the Irish Sea. Elsewhere south to the Mediterranean and Gabon.


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.