1a tentiform mine => 2

1b primairy blotch mine, without preceding corridor => 4

1c corridor from start to end (may form a secondary blotch) => 6

1d corridor, widening into a primary blotch: Lyonetia prunifoliella

1e fleck mine => 9

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

2a mine upper-surface, silvery => 3

2b mine lower-surface: Phyllonorycter cydoniella, sorbi

3a fully developed mine silvery-white, without dark speckles : Phyllonorycter leucographella

3b fully developed mine witg dark speckles, dirty-silvery: Phyllonorycter corylifoliella

4a mine full depth; on the same or neighbouring (younger) leaves thread thin corridor filled with frass; most frass is ejected from the blotch, some grains may be captured in silk below the mine: Lyonetia prunifoliella

4b mine upper-surface => 5

5a mine ca. 5 mm, triangular, brown, often in numbers; frass in a thick plug: Rhamphus oxyacanthae

5b mine larger, round with a dark centre; frass in concentric circles: Leucoptera malifoliella

6a mine >> 2 cm => 7

6b mine ≤ 2 cm => 8

7a the mine begins at an egg shell: Stigmella oxyacanthella (?)

7b no egg shell visible here: Lyonetia clerkella

8a mine narrow, branched, without frass: Recurvaria nanella

8b mine not narrow, unbranched, with much frass: Bucculatrix bechsteinella

9a case > 8 mm and/or mouth angle 45°: Coleophora hemerobiella

9b case smaller and/or mouth angle 90° Coleophora serratella