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.

Cassida hemisphaerica - A tortoise beetle

Range & Status

Widely distributed in southern England and scattered further north, but very localised.

Regional Distribution

Predominantly known from West Penwith and The Lizard, the most recent record being from the Sennen Cove area by Paul Gainey in 2005.

Habitat & Ecology

Feeds on Campions Silene spp. and other related plants on coastal shingle and



Loss of coastal grazing, leading to coarsening of sward and scrub development.


Maintain or restore cliff grazings.


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.