Micrographs of different stages of Oligogonotylus andinus sp. nov. A, B cercariae emerged from Aroapyrgus colombiensis, as temporary mounts C encysted metacercaria from Poecilia caucana, as a temporary mount D unencysted metacercaria isolated from P. caucana, as a permanent slide E, F paratype specimens, as temporary mounts G holotype adult specimen, isolated from A. latifrons, as a permanent slide. Scale bars: 20 μm (A, B); 20 μm (C, D); 100 µm (E–G).