Pengmarengo yangi sp. nov., male holotype and female paratype A holotype habitus, dorsal B ditto, lateral C ditto, ventral D female paratype habitus, dorsal E holotype carapace, frontal F holotype chelicera, posterior G holotype leg I, prolateral. Scale bars: 0.1 mm (F); 0.2 mm (E, G); 0.5 mm (A–D).