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.

Cathormiocerus myrmecophilus - A ground weevil

Range & Status

Syn C. britannicus Blair. Western oceanic, known from coast of Cornwall, Devon,

Hampshire and Sussex.

Regional Distribution

Old records from St. Mary' s and Tresco (Isles of Scilly); Bossiney, Tintagel; Whitsand Bay and Rame Head; The Lizard; St. Buryan; and Helston. The most recent reports are from St. Just, Nanven in 1970 by R.T. Bannister, Mullion in 1981 by D.A. Sheppard, Treen Cliff, Porthcurno in 1985 by A.P. Foster, and also Parc-an-als (Porthleven), Kynance Cove, and Lesceave and Rinsey Cliffs (by M.G. Morris in 1993). Rediscovered at Bossiney by K.N.A. Alexander in 2002.

Habitat & Ecology

Larvae root-feeding, while the adults occur at the base of plants, particularly Buck' s-horn Plantain Plantago coronopus where it grows on rocky sea cliffs. Has also been found in litter under heather.


Loss of semi-natural coastal pastures through abandonment of grazing, although relatively tolerant of under-management. Public pressure causing excessive trampling.


Many sites are owned by The National Trust and are within SSSI.


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.