Monthly surveys between October 1999 to August 2000 were carried out in nine stations from ponds of the Pantanos de Villa, Chorrillos, Lima. It was determined 128 species of protozoa, distributed in 101 genus, 69 families and 28 orders. A total of 73 species were new report in Pantanos de Villa. At the present time a total of 171 species of protozoa had been reported. The Ciliate was more diverse group with 61,72% of species, following for Mastigophora (21,9%) and Sarcodina (16,4%). The highest abundance was Mastigophora (75%), following Ciliate (19,5%) and Sarcodina (4,5%).

Two trematodes and one cestode of Fulica ardesiaca from Pantanos de Villa, Lima, Peru are registered at first time. Total of 698 parasites were counted, 529 individuals of Notocotylus pacifera, 149 individuals of Psilostomum sp. and 20 individuals of Diorchis Americana. This work is the first report in F. ardesiaca from Peru; while Psilostomum sp. and D. americana are first registrations for the Peruvian’s helminthes.

Monthly surveys between October 1999 to August 2000 were carried out in nine stations from ponds of the Pantanos de Villa, Chorrillos, Lima. It was determined 128 species of protozoa, distributed in 101 genus, 69 families and 28 orders. A total of 73 species were new report in Pantanos de Villa. At the present time a total of 171 species of protozoa had been reported. The Ciliate was more diverse group with 61,72% of species, following for Mastigophora (21,9%) and Sarcodina (16,4%). The highest abundance was Mastigophora (75%), following Ciliate (19,5%) and Sarcodina (4,5%).

En el presente trabajo se registran por primera vez para el Perú, los parásitos de un ejemplar de Fulica ardesiaca «gallareta andina» colectada en los Pantanos de Villa. Se colectaron un total de 698 especimenes: los tremátodos Notocotylus pacifera y Psilostomum sp. con 529 y 149 individuos respectivamente y el céstodo Diorchis americana, con 20. El presente trabajo constituye el primer reporte para el Perú de helmintos en F. ardesiaca y Psilostomum sp. y D. americana son primeros registros para la helmintofauna peruana.