Genital anatomy of Laeocathaica zhengpingliui Wu, sp. nov., HBUMM05553-spec.1, holotype A general view B right view of dart apparatus C cross-section of dart sac at the position arrowed in (A). Abbreviations: AS – accessory sac; At – atrium; 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.