Tetrablemma sokense sp. n., male holotype (A–C) and female paratype (D–F). A–C left palp D genital area (untreated) E, F cleared vulva (lactic acid-treated). A prolateral B frontal C retrolateral D–E ventral F dorsal. Abbreviations: CP = central process; Cy = palpal cymbium; E = embolus; EP = epigynal pit; Et = embolic tip; IVP = inner vulval plate; PA = preanal scutum; Pb = palpal bulb; POG = postgenital scutum; Sd = spermophor; SR = seminal receptacle; Ti = palpal tibia; VD = vulval duct; VS = vulval stem. Scale bars: 0.2 mm.