1a fleck mine => 2

1b corridor, blotch, or tentiform mine => 4

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

2a spathulate leaf case: Coleophora serratella

2b lobe case => 3

3a mine, next to the openings that are typical for fleck mines, also with much larger openings in the upper epidermis: Coleophora violacea

3b such large openings present as well, but in the lower epidermis: Coleophora potentillae

4a tentiform mine: Phyllonorycter ulmifoliella

4b no tentiform mine => 5

5a larva makes a full depth blotch, from where a circular excision is made: Alloclemensia mesospilella

5b no excision => 6

6a mine a corridor that (if it is not positioned too close to the leaf margin) starts with a spiral: Euhyponomeutoides ribesiella

6b mine never starting with a spiral => 7

7a remarkably long, slender, corridor; larva mines till short before pupation: Lyonetia clerkella

7b mine small, an irregular blotch or corridor; older larva lives free among spun young leaves: Cnephasia incertana