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
Widespread but under-recorded throughout Britain. In 1987 it was discovered that a
number of records previously thought to be of H. mengeii were in fact of a species new to Britain H. montivagus (Hopkin & Roberts, 1987) which has not been recorded so far in Cornwall or the Isles of Scilly.
Rarely recorded in Cornwall and the Isles of Scilly. Known sites are all on the coast of mainland Cornwall at Kynance Cove on the Lizard, Hudder Down near Godrevy, Higher Sharpnose Point near Morwenstow and at Widemouth Bay.
Habitat & Ecology
In Cornwall found mainly under stones in the splash zone of the sea shore.
The known sites are within areas designated for nature conservation.
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.