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.

Donacia dentata - A reed beetle

Range & Status

Very localised across southern and eastern England and has become increasingly scarce in recent years.

Regional Distribution

Recently recorded in west Cornwall from Marazion area (details not available).

Habitat & Ecology

Associated with Arrowhead Sagittaria sagittifolia and possibly Water-plantains Alisma spp.; the larvae are aquatic and the adults are attracted to flowers of Yellow Water-lily Nuphar lutea .


Silting or artificial in-filling of water bodies; pollution.


Protect open waters and their catchments from damaging activities.


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.