Contracaecum pelagicum Johnston & Mawson, 1942 y Seuratia shipleyi (Stossich, 1900) están registrados en Brasil parasitando Calonectris borealis (Cory, 1881), que es un nuevo huésped para ambas especies. Se presentam las principales medidas de estas especies en el nuevo huésped.

The present study investigated the presence of helminths in fillets of red piranha, Pygocentrus nattereri (Kner, 1858), with a note of a possible zoonotic potential of its consumption in nature. We examined 40 fish caught in lakes in the floodplain of the Solimões River, located in the municipalities of Coari and Manaus in central Amazonia, Brazil. All fish examined were adults and had yellow cysts in the musculature. Of the 69 cysts found, 66 were identified as metacercariae of Clinostomum marginatum (Braun, 1899) and 3 as Austrodiplostomum compactum (Lutz, 1928). The analysis shows a higher susceptibility of P. nattereri for metacercariae of C. marginatum. The fact that metacercariae were found in fillets of P. nattereri, suggests a risk situation, addresses a concern about its use in raw form. It should not be consumed without proper inspection, processing and freezing, since ceviche...