Halicyclops gaviriai sp. n., adult holotype female from northern Colombia. A urosome showing genital somite, ventral view B anal somite showing anal pseudoperculum, dorsal view C internal structures of genitalia, ventral view, D proximal section of middle apical setae of caudal ramus E leg 5; adult male from same locality F urosome, ventral view G lateral view of cephalothorax showing position of integumental windows H geniculate antennule, showing brush-like modified setae on segments 10–12. Scale bars: A,B, F, H =50 μm, C–E= 25 μm, G=100 μm.