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.

Merrifieldia tridactyla - Western Thyme Plume

Range & Status

Syn. Pterophorus fuscolimbatus Duponchel. Listed by Ball (1986) as pRDB1 and certainly a RDB species. In Britain confined to the Lizard Peninsula, and also found on the Burren in Ireland. Widely recorded in Europe (Gielis, 1996).

Regional Distribution

First recorded in Britain in 1960 at Kynance Cove (Pelham-Clinton, 1965) and more recently at Coverack, where the larvae were common (Heckford, 1988). Also found elsewhere on the Lizard (Heckford, 1991).

Habitat & Ecology

The larvae feed on Wild Thyme Thymus polytrichus , which is widespread in Cornwall.


None known.




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.

Cornish Biodiversity Network. 2017.