Crepis hawk’s-beard
incl. Barkhausia.
(For a dichotomous table for galls on Crepis by Hans Roskam click here)
Dichotomous table for leafminers
1a mine full depth; larva with chitinised head => 2
1b mine upper- or lower-surface; larva a maggot => 5
1c galls, etc => Tables for all parasites per species
Dichotomous table for leafminers
1a mine full depth; larva with chitinised head => 2
1b mine upper- or lower-surface; larva a maggot => 5
1c galls, etc => Tables for all parasites per species
2a mine large; larva, pale and without feet, mines all its life: Orthochaetes setiger
2b mine small; larva, dark and with thoracic legs, mines only briefly, lives later free among spun leaves => 3
3a larva: pinacula colourless (the bases of the setae themselves are black) : Cnephasia incertana
3b pinacula black => 4
4a larva: behind/below the anus a chitinous comb: Cnephasia asseclana
4b anal comb absent: Cnephasia stephensiana
5a upper-surface blotch or wide corridor, with conspicuous secondary feeding lines => 6
5b no secondary feeding lines apparent => 7
6a mine not associated with the midrib, brown: Liriomyza endiviae
6b mine positioned over the midrib, greenish: Trypeta immaculata
7a mine associated with the midrib => 8
7b mine independent of the midrib => 13
8a larva in the midrib, which is galled and swollen (actually a gall rather than a mine) => 9
8b midrib not galled and swollen => 10
9a on Crepis biennis: Phytomyza robustella
9b on Crepis paludosa: Phytomyza araciocecis
10a mine pinnately branched; main corridor overlying the midrbib; frass apparent, in strings; pupation after the mine has been vacated; larva: cephalic skeleton of the Phytomyzinae-type: Liriomyza strigata
10b larva lives within the hollow midrib, makes from there excursions into the lamina; these branches are almost free of frass; frass is concentrated in the base of the hollow midrib; there also the pupation; larva: cephalic skeleton of the Agromyzinae-type => 11
11a larva: rear spiraculum with 8-9 papillae: Ophiomyia cunctata
11b arva: rear spiraculum with > 10 papillae => 12
12a larva: front spiraculum spinelike, pointing upward: Ophiomyia pulicaria
12b larva: front spiraculum broad, curved: Ophiomyia beckeri
13a puparium in the mine in a, usually lower-surface, pupal chamber; corridor not unusually long: Chromatomyia cf. syngenesiae
13b pupation after the mine has been vacated; mine starts with an unusually long lower-surface corridor: Phytomyza marginella
Not included in the key: Phytomyza cecidonomia.