Key to species of the jigongshanica species-group based on male genitalia

1 Costa of valva in male genitalia with a large median process (Fig. 18).......................... M. robustijuxta sp. nov.

- Costa of valva without a process......................................................................... 2

2 Valva with a ventral process at base or beyond basal 2/3....................................................... 3

- Valva without a ventral process (Wang 2003: Fig. 17)............................................ M. jigongshanica

3 Valva with a rounded ventral process at base (Wang 2003: Fig. 12)................................. M. cornutivalvata

- Valva with a sub-triangular ventral process beyond basal 2/3 (Fig. 19).......................... M. varilobata sp. nov.