Genital anatomy of Laeocathaica potanini Möllendorff, 1899, HBUMM00633-spec.1 A general view B–D right, apical, and ventral views of dart sac apparatus. Abbreviations: AS – accessory sac; At – atrium; BC – bursa copulatrix; BCD – bursa copulatrix duct; DS – dart sac; DtC – a chamber containing love dart; Ep – epiphallus; FO – free oviduct; MG – mucous glands; P – penis; PAS – proximal accessory sac; PR – penial retractor muscle; PS – penial sheath; Va – vagina; VD – vas deferens. Asterisk * indicates the opening of proximal accessory sac.