Wingspan 6-8 mm. A common species throughout most of the British Isles, and best identified from the similar P. sorbi and P. mespilella by the foodplant, usually hawthorn (Crataegus) .
The larval mine is a blotch on the underside of a leaf, often causing the edges of a lobe to curl under.
In common with other species, there are two generations, producing adults in May and in August. Some more northern examples have rather more blackish suffusion in the wing.