Digeneans and cestodes parasitic in the white-faced ibis Plegadis chihi (Aves : Threskiornithidae) from Argentina

Some digeneans and cestodes parasitic in a population of the white-faced ib is Plegadis chihi (Vieillot) from Buenos Aires province, Argentina, are pre sented. The digeneans Dietziella egregia (Dietz, 1909), Patagifer bilobus ( Rudolphi, 1819), Ascocotyle (Leighia) had, a Ostrowski de Nunez, 1992 and P osthodiplostomum nanum Dubois, 1937 from the intestine; Prosthogonimus ovat us (Rudolphi, 1803) from the cloaca; Athesmia Heterolecithodes (Braun, 1899 ) from the bile ducts and the cestode Hymenolepis megalops (Nitzsch in Crep lin; 1829) from the cloaca, were recorded. The discovery of D. egregia, P. ovatus, A. heterolecithodes and P. nanum constitute new host and/or new geo graphical records. Adults of A. (L.) hadra, previously described in experim ental definitive hosts, are first reported from a naturally infected bird. Hymenolepis megalops, a cestode of Anseriformes is first reported from Cico niiformes.