Marengo zhengi sp. nov., male holotype and female paratype A, B epigyne, ventral C vulva, dorsal D holotype habitus, dorsal E ditto, lateral F ditto, ventral G female paratype habitus, dorsal H holotype carapace, frontal I holotype leg I, retrolateral. Scale bars: 0.1 mm (A–C); 0.2 mm (H, I); 0.5 mm (D–G). Abbreviations: At – atrium; CD – copulatory duct; FD – fertilization duct; MS – median septum; S – spermatheca.