Enchiridium daidai sp. nov., ICHUM 5993 (holotype), schematic diagram (A) and sagittal sections (B–D), anterior to the right. A Schematic diagram of copulatory complex B a common muscle sheath/bulb enclosing two prostatic vesicles and penis stylet C ejaculatory duct penetrating a common muscle sheath/bulb D female copulatory apparatus. Abbreviations: cg cement glands cp cement pouch ed ejaculatory duct fg female gonopore it intestine ma male atrium mg male gonopore ms muscle sheath/bulb pd prostatic duct pp penis papilla ppo penis pouch pv prostatic vesicle spv spermiducal vesicle st stylet sv seminal vesicle va vagina. Scale bars: 500 µm.