Fig. 2

Photomicrographs of haptoral and genital hard parts of the monogenean species collected in Lake Tana from the North African catfish Clarias gariepinus. a Gyrodactylus gelnari, haptor. b G. gelnari, marginal hook sickles. c G. gelnari, spines of the male copulatory organ. d Macrogyrodactylus clarii, haptor. e M. clarii, spines of the male copulatory organ. f M. clarii, marginal hook sickle. g Quadriacanthus sp. 1, haptor. h Quadriacanthus sp. 2, haptor. i Quadriacanthus sp. 2, male copulatory organ. j Quadriacanthus aegypticus, haptor. k Q. aegypticus, male copulatory organ. l Q. aegypticus, vagina