Urocleidoides paratriangulus sp. nov. from Psectogaster amazonica from Tocantins River: (12) copulatory complex, ventral view; (13) vaginal sclerite; (14) vagina; (15, 16) dorsal bar; (17) ventral bar; (18) ventral anchor; (19) dorsal anchor, (20) hook pairs 1, 5; (21) hook pairs 2–4, 6, 7. Scale bars: 12 = 10 µm, 13–14 = 10 µm, 15–17 = 20 µm, 18–19 = 20 µm, 20 = 5 µm, 21 = 10 µm.