Key to the species of Stereodytis based on the male genitalia

1. Gnathos elongated and beak-shaped medially.............................................................. 2

- Gnathos not elongated medially.......................................................... S. eclipsia sp. nov.

2. Apex of valva oriented upward, dorsally.................................................................. 3

- Apex of valva oriented downward, ventrally............................................................... 4

3. Apex of valva pointed and hooked.............................................................. S. acutidens

- Apex of valva digitate and blunt................................................................. S. crithina

4. Apex of valva narrow and arched dorsally and apical half of sacculus broad........................... S. brevignatha

- Apex of valva digitate and apical half of sacculus narrow.............................................. S. increta