Megathylacus travassosi sp. n. and Nomimoscolex sudobim Woodland, 1935 (Cestoda - Proteocephalidea) parasites of Pseudoplatystoma corruscans (Agassiz, 1829) (Siluriformes - Pimelodidae) from the Itaipu reservoir and Parana River, Parana State, Brazil

it is described megathylacus travassosi sp. n., parasite of pseudoplatystoma corrusccans (agassiz,1829), a pimelodid fish caught in itaipu reservoir and paraná river, brazil. nomimoscolex sudobim woodland, 1935 is redescribed and for the first time referred parasitising p. corruscans. the list of proteocephalid cestodes of genus pseudoplatystoma bleeker, 1862, with its geographic distribution is given.