Skleroprotopus penglai sp. nov.. A, I female paratype; B–H male paratype. A, B gnathochilarium; C legs 7, anterior view; D legs 1, anterior view; E posterior gonopods, anterior view; F legs 2 with penis, posterior view; G anterior gonopods, anterior view; H anterior gonopods, posterior view; I left vulva, mesal view. Abbreviations: cp, coxal process; cx, coxa; f, flagellum; ll, lamella lingualis; ml, membranous lobe; op, operculum; pn, penis; pr, promentum; r, remnant; t1–t4, telopoditomeres 1–4; te, telopodite. Scale bars: 0.2 mm.

 
 
  Part of: Chen R, Zhao Y, Golovatch S, Liu W-X (2024) Molecular phylogenetic and morphological studies reveal increased species diversity in the millipede genus Skleroprotopus Attems, 1901 in China (Julida: Mongoliulidae). Arthropod Systematics & Phylogeny 82: 659-691. https://doi.org/10.3897/asp.82.e136751