|The long intersegmental spines which are diagnostic for the pupa of Phyllonorycter messaniella.|
This is a widespread species in the UK on evergreen oak Q. ilex and various deciduous oaks, as well as some other tree genera (Heath & Emmet, 1985). However neither this book nor the excellent leaf-miner websites here and here give Q. suber as a host for the moth in the UK. The next job is to find out whether it really is a new host for the moth in this country... update when I know more.
Heath, J. & Emmet, A.M. (eds.) (1985). The Moths and Butterflies of Great Britain and Ireland. Volume 2: Cossidae - Heliodinidae. Harley, Colchester.