Saxifraga saxifrage
(For a dichotomous table for galls on Saxifraga by Hans Roskam click here)
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
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 body: 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 rosette covered 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..