Moricandia violet cabbage, purple mistress
Dichotomous table for leafminers
1a mine full depth, (almost) without frass, with an opening through which the larva has entered => 2
1b mine full depth, with clear amounts of frass, no recognisable opening: Ceutorhynchus minutus
1c mine lower- or upper-surface, with frass; no opening => 5
1d galls, etc => Tables for all parasites per species
2a larva mines from a helicoidal case: Apterona gracilis
2b larva does not mine from a case => 3
3a mine < 1 cm; older larvae live free under the lea: Plutella xylostella
3b mine larger; larvae mine facultatively, either life-long, or older larvae among spun leaves => 4
4a mine begins as a broad corridor: Selania leplastriana
4b mine a broad blotch from the start on: Hellula undalis
5a short gallery, that ends or begins on a thick vein; the larva essentially lives as a borer in the veins, petiole, or stem => 6
5b the larva does not mine in (though sometimes upon!) the veins => 7
6a larva a maggot: Phytomyza rufipes
6b larva with chitinised head: Ceutorhynchus pallidactylus
7a pinnately branched gallery, main and side branches on top of the midrib and side veins: Liriomyza strigata
7b blotch, or little, not pinnately, branched gallery; mine not determined by the leaf venation => 8
8a gallery from start to end => 9
8b one or more galleries, ending in a common blotch: Scaptomyza flava
9a pupation within the mine, in a, generally lower-surface, pupal chamber; frass in well-spaced grains: Chromatomyia horticola
9b pupation external; frass in strings: Liriomyza brassicae