Saxifraga saxifrage
Dichotomous table for leafminers
1a large blotch in one of the lower leaves, continuing through the petiole and root collar down to the roots: Otiorhynchus rugifrons
1b if the mine at all includes the petiole, it is not in the lower leaves and does not extend to below ground => 2
1c galls, etc => Tables for all parasites per species
2a corridor, later a blotch in which a circular excision is made: Alloclemensia mesospilella
2b no excision => 3
3a irregular, small, blotch or corridor in early spring; older larvae live free among spun young leaves => 4
3b not this combination of characters => 6
4a larva: pinacula colourless (but the base of the setae black): Cnephasia incertana
4b pinacula black => 5
5a larva has a chitinous comb below the anus: Cnephasia asseclana
5b larva without such a comb: Cnephasia stephensiana
6a larva a maggot=> 7
6b larva with thoracic feet and a chitinised head => 8
7a larva: rear spiracula fused into a reddish brown tube that extends behind the : Cheilosia semifasciata
7b rear spiracula not fused, colourless (rarely black) => 8
8a on rosette-forming Saxifraga species: Chromatomyia aizoon
8b on Saxifraga’s that do not form rosettes => 9
9a on Saxifraga rotundifolia: Chromatomyia saxifragae
9b on Saxifraga carpatica: Liriomyza clarae
10a mined rossette coveres in spinning: Kessleria saxifragae
10b larva does produce (almost) no silk => 11
11a the larva begins its life by making a corridor: Kessleria alpicella
11b the mine starts as a blotch: Stenoptilia millieridactylus
Not included in the key: Cnephasia ecullyana; Kessleria albescens, alternans, inexpectata, insubrica, klimeschi, orobiae, wehrlii, zimmermanni..