Trogloneta yuensis Lin & Li, 2013, female epigyne (A, B) and vulva (C, D lactic acid-treated). A, C ventral B lateral D dorsal. Abbreviations: Acc accessory gland; At atrium; CD copulatory ducts; CO copulatory opening; FD fertilisation ducts; S spermathecae; Sp scape. Scale bars: 0.20 mm.