Callistephus, china aster

Dichotomous table for leafminers

1a secundary feeding lines conspicuous; mine a broad corridor on top of the midrib, from wich fan-shaped lobes extend to the leaf margin (occurrence on this hostplant needs confirmation): Cornutrypeta spinifrons

1b secundary feeding lines not or hardly discernable; mine with different shape=> 2

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

2a pupation within the mine => 3

2b pupation external => 5

3a mine a blotch: Calycomyza humeralis

3b a corridor => 4

4a corridor exceptionally long and narrow: Ophiomyia maura

4b corridor not unusually long and narrow: Chromatomyia syngenesiae

5a corridor pinnately branched, its main branch on top of the midrib, side branches over the lateral veins: Liriomyza strigata

5b corridor winds freely through the leaf => 6

6a larva: rear spiraculum with 3 papillae: Liriomyza bryoniae

6b rear spiraculum with 6-9 papillae: Liriomyza pusilla

Not included in the key: Chromatomyia syngenesiae; Liriomyza trifolii.

Tables for all parasites per species

mod 9.x.2017