incl. Lastrea, Nephrodium.
Dichotomous table for leafminers
1a leaf tip rolled in: Chirosia betuleti
1b mine lower in the leaf, leaf remains flat => 2
1c galls, etc => Tables for all parasites per species
2a mine in midrib and/or petiole (occurence on this hostplant uncertain): Heptamelus ochroleucus
2b blotch mine in the leaf disk => 3