Lithospermum gromwell
(For a dichotomous table for galls on Lithospermum by Hans Roskam click here)
Dichotomous table for leafminers
1a fleck mine: Coleophora pennella
1b corridor or blotch =>2
1c galls, etc => Tables for all parasites per species
Dichotomous table for leafminers
1a fleck mine: Coleophora pennella
1b corridor or blotch =>2
1c galls, etc => Tables for all parasites per species
2a mine at least partly full depth, whitish in transparency; larva with feet and chitinised head => 3
2b mine upper- or lower-surface, greenish in transparency; larva a maggot => 4
3a mine very small, irregulary in shape; older larvae live free among spun leaves: Cnephasia incertana
3b mine a large blotch; larvae mine all their life: Dialectica imperialella
4a corridor from start to end: Chromatomyia horticola
4b mine eventually a blotch => 5
4a larva: cephalic skeleton with 2 arms directed backwards => 6
4b cephalic skeleton with 3 arms directed backwards => 7
6a larvae communal: Phytomyza medicaginis
6b larva solitary: Phytomyza lithospermi
7a secondary feeding lines conspicuous; in the blotch the frass more or less reticulate: Agromyza abiens
7b secondary feeding lines inconspicuous; in the blotch the frass not reticulate: Agromyza lithospermi