Aculithus ruijin sp. nov., male palp (holotype) and epigyne (paratype). A Left palp, prolateral view; B Same, ventral view; C Same, retrolateral view; D Same, dorsal view; E Epigyne, ventral view; F Vulva, dorsal view. Abbreviations: Bu − bursa, CD − copulatory duct, CO − copulatory opening, CT − connecting tube, DTA − dorsal tibial apophysis, Em − embolus, FA − femoral apophysis, FD − fertilisation ducts, GA − glandular appendage, MS − median septum, rTA − retrolateral tegular apophysis, RTA − retrolateral tibial apophysis, Spe − spermathecae. Scale bars: 0.1 mm (A−F).