Nationally scarce (Na) in damp woodland in southern England. First discovered in 2006 as new to science in Havant Thicket, Hampshire, subsequently found more widely in Hampshire and adjacent counties. In 2007, found to be widespread, and hence likely to have been a long-term, previously undiscovered resident. Not recorded from the Isle of Wight to date. Wingspan 6-7 mm. More frequently recorded in the larval stage, when the mines are fairly easy to find where they are present; the imago can be separated from
P. saligna only by dissection of the genitalia. Larva mines stems of Grey Willow, Goat Willow and Eared Willow. Mine very similar to
P. saligna, which mines only Purple Willow and Crack Willow.