Onoclea matteuccia
Incl. Matteuccia, Struthiopteris.
Dichotomous table for leafminers
1a larva makes a normal mine in a number of leaf segments: Chirosia histricina
1b larva lives in the leaf tip which is curled inwards, in fact as a gall maker: Chirosia betuleti & Ch. cinerosa
1c galls, etc => Tables for all parasites per species