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
Always very localised in England, but has become very much scarcer in recent years.
Known from two old records: Porthgwarra (R.T. Bannister, 1963) and Marazion (1906).
Habitat & Ecology
The rarest of the four-spotted arboreal Dromius species; like the others, it is found on
the trunk and branches of broadleaved trees and shrubs, and its rarity inexplicable at
The reasons for its extreme rarity are not understood and so it is impossible to suggest threats.
The reasons for its extreme rarity are not understood and so it is impossible to formulate a conservation plan.
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.