Bicoxidens

species in Mwabvu et al. (2007) in order to accommodate aridis . Th is becomes the first couplet because the shape of the distal region of the telocoxite and the structure of the telopodite distinguish aridis from congeners:

1 Apical metaplica hook-shaped and with a median cavity (Figs. 1a, 1b), without produced lateral or median processes; post knee telopodite not L-shaped (Fig. 1a), with a clockwise coil after the femoral lobes and without looping at the extremity (Fig. 2) .............................................. Bicoxidens aridis sp. n.

– Apical metaplica not hook-shaped and without a median cavity; with produced lateral or median processes; post knee telopodite L-shaped, without a clockwise coil after the femoral lobes and with looping at the extremity........ .................................................................. 2 (all other Bicoxidens species, see key in Mwabvu et al. (2007))