FIGURES 20–22 in The millipede genus Skleroprotopus Attems, 1901 (Diplopoda, Julida, Mongoliulidae) in China, with description of a new species

FIGURES 20–22. Skleroprotopus securifer sp. nov., male holotype (FSCB). 20. Posterior gonopod, mesal view, slightly turned back. 21. Posterior gonopod, plus tip of flagellum, lateral view. 22. Distal part of posterior gonopod, lateral view. Abbreviations: a, anterior branch; f, flagellum apex; p, posterior part; r, telopodite remnant. Scales: 20 μm (Fig. 22), 100 μm (Fig. 20), in mm (Fig. 21).