Genital anatomy of Laeocathaica carinalis Chen & Zhang, 2004, HBUMM08300-spec.1 A general view B cross-section of dart sac at the position arrowed in (A) C apical view of dart sac apparatus. 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; PO – opening of proximal accessory sac leading to dart chamber; PR – penial retractor muscle; PS – penial sheath; Va – vagina; VD – vas deferens. Asterisk * indicates the opening of proximal accessory sac.