A description of Tetraonchus gussevi sp. n.(Monogenea) from trout (Salmo trutta m. fario)

5 pages, 2 figures, 1 table.--160 specimens of trout (Salmo trutta m. fario) were examined in Bulgaria (Shirokolayka River) and 143 specimens of the same host in Spain (Porma River). 4.89% were parazitized with Tetraonchus gussevi sp. n. The intensity of the infection was of 1 to 14 specimens. There are comparative description, sizes and drawings of the new monogenean species.Peer reviewe