Copulatory organs of Kolymocyba petrophila (A–C, F–H) and Walckenaeria microspiralis (D–E, I). A–C terminal part of male palp, prolateral, antero-prolateral and ventral; D, F whole male palp, retrolateral; E whole male palp, dorso-retrolateral showing dorsal tibial apophysis; G–I epigyne, ventral. Scale = 0.1 mm if not otherwise indicated. Abbreviations: Em – embolus, Mm – median membrane, Ra – anterior radix apophysis, Rp – posterior radix apophysis, Sa – suprategular apophysis, Tp – tailpiece of embolic division.