Matricaria wild chamomille, pineapple weed, rayless mayweed

Dichotomous table for leafminers

Incl. Anthemis, Cota, Tripleurospermum

1a fleck mine: Coleophora follicularis

1b corridor and or blotch mine=> 2

1c galls, etc => Tables for all parasites per species

2a mine full depth; larva with thoracic feet and chitinised head => 3

2b mine upper- or lower-surface; larva a maggot => 7

3a mines small and of indefinite shape; older larvae live free among spun leaves => 4

3b mine not unusually small, a gallery or bloch, or larvae feeding from a silken tube => 6

4a larva: pinacula colourless (the bases of the setae themselves are black) : Cnephasia incertana

4b pinacula black => 5

5a larva: behind/below the anus a chitinous comb: Cnephasia asseclana

5b anal comb absent: Cnephasia stephensiana

6a initially a hair-thin corridor along the leaf margin; later full depth blotches are made from the leaf margin: Bucculatrix cristatella

6b larva makes blotch mines from a silken tube, covered with sand grains: Scrobipalpula psilella

7a short gallery that seems to end upon a thick vein: Ophiomyia curvipalpis

7b not so => 8

8a secondary feeding lines conspicuous: Trypeta zoe

8b no secondary feeding lines => 9

9a frass in discrete grains; pupation in the mine, in a, usually lower-surface, pupal chamber: Chromatomyia cf. syngenesiae

9b prior to pupation the larva leaves the mine through a semicircular exit slit; frass at least partly in strings => 10

10a mine extends from the leaf basis; frass in strings; larva: rear spiraculum with met 9-13 papillae: Liriomyza strigata

10b mine extends from the leaf tip; frass in pearl chains and discrete grains; rear spiraculum with 18-20 papillaw: Phytomyza pullula

10c“small brown mine” in Anthemis tinctoria; rear spiraculum with 6-9 papillae: Liriomyza centaureae

10d frass in strings; rear spiraculum with 3 papillae: Liriomyza ptarmicae

Not included in the key: Scrobipalpa montella (mine not described).

mod 9.x.2017