Key to species of Plagiotaphrus

1. Apical proplica convex medially, narrow and setose (Figs 1 a, 1b); subapical proplica not produced into a rounded lateral lobe at level of telopodite knee; antetorsal process crescent-shaped distally (Fig. 1 e) ........................... sulcifer

- Apical proplica not convex medially, apically tapering and acute (Fig. 2 a); subapical proplica produced into a setose, rounded lateral lobe at level of telopodite knee (Fig. 2 a); antetorsal process strongly curved into a semi-circle (Fig. 2 b) .................................................................................................................................................................. improvisus