Key to male genitalia of Agonochaetia

The males of A. impunctella and A. quartana are not known.

1. Apex of sacculus rounded..............................................................................2

- Apex of sacculus acute.................................................................................3

2. Sacculus bend near apex; phallus about 20x longer than wide..........................................9. A. tuvella

- Sacculus bend near base; phallus 8x longer than wide.............................................3. A. incredibilis

3. Saccus longer than valva complex (SAL /VLL> 1.3)..........................................................4

- Saccus shorter than valva complex (SAL /VLL <1)...........................................................5

4. Vincular emargination U-shaped, vincular processes squared, mesially narrow, with obliquely squared tip....1. A. conspersa

- Vincular emargination V-shaped, vincular processes humped, mesially wide, with rounded tip............7. A. shawinigan

5. Vincular processes obliquely squared and barely extended beyond posterior margin of vinculum............. 5. A. lvovskyi

- Vincular processes pointed and extended markedly beyond posterior margin of vinculum.............................6

6. Ventro-distal edge of cucullus broadly rounded and gradually tapered to apex.......................... 4. A. intermedia

- Ventro-distal edge of cucullus markedly produced into sub-triangular projection, forming acute angle with cucullus tip..............................................................................................8. A. terrestrella