The process of the development of Parogonimus peruvianus Miyazaki, Ibóñez y Miranda, 1969 in domestic cat Felis cati L. experimentally infected by means of orally given metacercarias extracted from specimens of Pseudothelphusa chilen.is Milne Edwards, 1843 from endemic areas, has been studied.

It is motive of this present note to contribute to knowledge of one tremotode: Paryphostomum huaccoci sp. n. of the Family Echinostomatidae Poche,1926, parasite of Cathartes aura jota Molina, 1782.

The process of the development of Parogonimus peruvianus Miyazaki, Ibóñez y Miranda, 1969 in domestic cat Felis cati L. experimentally infected by means of orally given metacercarias extracted from specimens of Pseudothelphusa chilen.is Milne Edwards, 1843 from endemic areas, has been studied.

It is motive of this present note to contribute to knowledge of one tremotode: Paryphostomum huaccoci sp. n. of the Family Echinostomatidae Poche,1926, parasite of Cathartes aura jota Molina, 1782.

The index of natural infection and the density of parasitism in crabs collected in three provinces of the Department of Cajamarca, Peru, have been studied, and they have revealed that metacercariae of Paragonimus Braun, 1899 are found in 43.97% of 539 specimens of Pseudothelphusa chilensis Milne Edwards, 1843, the unique crab found in the zone. The parasited organ was almost exclusively the hepatopancreas averaging 10.33 metacercarias per crab. The adult specimens which were inoculated with metacercariae were identified as Paragonimus peruvianus Miyazaki, Ibáñez & Miranda, 1969, with the exception of three samples which belonging to the species Paragonimus caliensis Little, 1968.

Se ha estudiado el índice de infección natural y la intensidad del parasitismo en cangrejos recolectados en tres provincias del Departamento de Cajamarca, Perú, habiéndose encontrado metacercarias de Paragonimus Braun, 1899 en el 43.97% de 539 especímenes de Pseudothelphusa chilensis Milne Edwards, 1843, único cangrejo hallado en la zona. El órgano parasitado fue casi exclusivamente el hepatopancreas, siendo 10.33 el número promedio de metacercarias por cangrejo. Las formas adultos logradas mediante inoculación de las metacercarias, fueron identificadas como Paragonimus peruvianus Miyazaki, Ibáñez y Miranda, 1969, con excepción de tres ejemplares que correspondieron a lo especie Paragonimus caliensis Little, 1968.