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
Formerly P. latreillella , listed by Ball (1986) as pRDB2, this species has been recorded throughout Britain and in parts of Ireland, but rarely found (Sokoloff, 1992). In fact Heckford (in a forthcoming untitled paper for the Entomologist' s Gazette ) suggests that many records from southern England are either unconfirmed or misidentified, and the only confirmed records are from Dorset over 100 years ago, west Cornwall (where it was last recorded on 25th May 1956) and sand dunes in north Devon. It has also been recorded from northern England, Scotland and Ireland.
The only known Cornish site (Park Shady) was destroyed by cultivation in 1956.
Habitat & Ecology
The larvae feed on Viola species, especially Viola canina and Viola hirta (Emmet & Langmaid, 2002) - neither of which are common in Cornwall and Scilly - and in Scotland on Viola riviniana (Heckford, pers. comm.) \endash which is common and widespread in Cornwall. Following its discovery by Heckford in 2008 on sand dunes in north Devon (pers. comm.) it could occur on Cornish dunes. The adult flies in sunshine.
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.