Range & Status
Listed by Parsons (1993) as ' insufficiently known' , but very local and possibly declining. Mainly recorded in Cornwall, Devon, Somerset, Sussex, Gloucestershire and parts of Wales, often as singletons. This species may have been overlooked because of its similarity to Phlyctaenia coronata (Hufnagel). Found throughout Europe and into Japan.
First recorded at Saltash in 1971 (Parsons, 1993) and subsequently near Herodsfoot (1993 and 1995), Bodmin (1995) (Spalding, 1995a) and Callington (2005 and 2006).
Habitat & Ecology
The recent Cornish sites are in woodland near Herodsfoot, on open ground at Bodmin Beacon, and at Stockaton and Callington. The larvae feed on Stachys species; Betony Stachys officinalis , Hedge Woundwort S. sylvatica , Marsh Woundwort S. palustris and Field Woundwort S. arvensis; are all common species in Cornwall.
Parsons lists clear-felling of woodland as a possible threat, but P. stachydalis has survived partial felling at Herodsfoot. The foodplant is unlikely to have been destroyed by felling.
The site at Bodmin Beacon is a local nature reserve; the site near Herodsfoot is owned by the Forestry Commission.