Sanguisorba burnet

Dichotomous table for leafminers

1a small (< 1 cm) full depth blotch or broad corridor; larvae later live free: Spialia sertorius

1b upper-surface corridor without an egg shell at the beginning; larva a maggot => 2

1c full depth corridor, may be widening into a blotch; frass in a central line; mine begins near a shining egg shell => 3

1d fleck mine => 6

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

2a in the first part of the mine frass in two rows of fine grains; larva: rear spiraculum with 3 papillae: Agromyza idaeiana

2b frass here almost filling the entire corridor; rear spiraculum with 6 papillae: Agromyza sulfuriceps

3a strongly contorted corridor, widening into a blotch: Ectoedemia angulifasciella

3b corridor neither contorted, nor forming a clear blotch => 4

4a egg usually upper-surface; final part of corridor clearly widened: Stigmella poterii

4b egg generally lower-surface; corridor hardly widened towards the end => 5

5a first third of the corridor entirely filled with greenish frass: Stigmella anomalella

5b frass here in a narrow central line, leaving a clear zone at either side: Stigmella centifoliella

5c mine as 5b; larva unknown: Stigmella thuringiaca

6a larva in a helicoid case; hole in the mine angular: Apterona helicoidella

6b larva in a tubular case; hole neatly round => 7

7a tubular leaf case: Coleophora albicostella

7b lobe case => 8

8a living on the leave’s upper surface: Coleophora violacea

8b on the lower surface: Coleophora potentillae

Not included in the key: Coptotriche szoecsi, tantalella; Habroloma triangulare; Stigmella centifoliella, muricatella, rolandi, sanguisorbae; Trachys lichtensteini, scrobiculatus.

mod 9.x.2017