The key is based on Thibaud et al. (2004).
1 Head without eye................................................................ M. coeca Cassagnau, 1959
- Head with eyes...................................................................................... 2
2 Eyes 5 + 5; a 2 chaeta on Th III absent.................................................. M. libyca (Caroli, 1914)
- Less than 5 + 5 eyes; a 2 chaeta on Th III present............................................................̔3
3 Eyes 2 + 2 or less............................................................... ̔ M. ojcoviensis (Stach, 1919)
- Eyes 3 + 3 or 4 + 4...................................................................................̔4
4 Empodial filament reaching 1/3 of the inner edge of the claw. Abd I–III 1 + 1, rarely 2 + 2 in m-row............................................................................................. ̔ M. boneti (Tarsia in Curia, 1941)
- Empodial filament reaching about the middle of the claw. Abd I–III 5 + 5 in m–row.............. M. seotalensis sp. nov.