Illustration of reproductive system of the holotype of Hirudinaria thailandica sp. nov. A dorsal view of male and female reproductive organs including positions of ganglia XII and XIII of the ventral nervous system. Lateral views of B male and C female reproductive organs. Scale bar: 2 mm. Abbreviations: atr, male atrium; cod, common oviduct; ej, ejaculatory bulb; ep, epididymis; fg, female gonopore; mg, male gonopore; ov, ovary; ps, penis sheath; ts, testisac. vas, vas deferens; vc, vaginal caecum; and vg, vagina.