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
Diptera: Cecidomyiidae; local.
VC2: SX35 East of Trerulefoot in 2008, a first record for Cornwall.
Habitat & Ecology
Associated species: Sweet Violet Viola odorata . Galls are a roll on one or both sides
of leaf and are often hairy; larvae inside rolled leaf are white when young, later turning
orange-yellow. Dasineura species making similar galls on different Viola species were split up in 1982 but this needs further research and confirmation.
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.