Reproductive system. A Camaena lingyunensis sp. n. (holotype, FJIQBC 19280, Kasuo, Lingyun, Guangxi, China) B Camaena detianensis sp. n. (holotype, FJIQBC 18472, Detian Falls, Daxin, Guangxi, China) C Camaena hahni (FJIQBC 19301, Huu Lien Nature Reserve, Lang-Son, Vietnam) D Camaena cicatricosa (FJIQBC 18505, Guiping, Guangxi, China). Abbreviations: V, verge; AG, albumen gland; BC, bursa copulatrix; E, epiphallus; F, flagellum; HD, hermaphroditic duct; P, penis; PR, penis retractor muscle; PBC, pedunculus of bursa copulatrix; VD, vas deferens.