Figures 2–7.Metabacetus willi sp. n., male genitalia (Figs 2–3, 5–7 holotype, cave Seplawan; Fig. 4 paratype, cave Ngingrong) 2, 4 median lobe of aedeagus, left lateral view 3 median lobe of aedeagus, dorsal view 5 right paramere, internal face 6 right paramere, external face 7 left paramere, internal face. Scale line: 0.3 mm (Figs 2–3; 5–7); 1 mm (Fig. 4).