Paragorgorhynchus aswanensis n.sp. (acanthocephala: Echinorhychidae): an intestinal parasite of some fishes from aswan high dam lake in upper egypt
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Paragorgorhynchus aswanensis n.sp. is described, both by light and scanning electron microscopy, from Lates niloticus,, Clarias lazera, Bagrus bayad, B. docmac, and Tetraodon fahaka, caught from the Aswan High Dam Lake in Upper Egypt. The new species is differentited from the two other species known so far from the genus Paragorgorhynchus. A correlation exists between the incidence of this acanthocephalan and its intensity of infection in fish. A key is proposed to separate known species of the genus Paragorgorhynchus.