Is Szidat, 1973 (Digenea: Haploporidae) a valid species? Genetic and morphological studies of this controversial species.

is a genus within the family Haploporidae and is distributed throughout the Americas. The recent application of molecular techniques has facilitated the reorganization of this genus and the description of new species, resulting in a current total of 28 species. In Argentina, 11 species have been identified; however, the validity of and remains controversial.

MOLECULAR AND NEW MORPHOLOGICAL DATA ON NEMATODE HEDRURIS DRATINI FOUND PARASITIZING PSEUDIS MINUTA (ANURA: HYLIDAE).

Hedruris has a worldwide distribution, parasitizing lampreys, fishes, frogs, and lizards. In South America, 4 species have been reported on frogs (Hedruris heyeri, Hedruris juninensis, Hedruris moniezi, and Hedruris mucronifer), 3 on fishes (Hedruris basilichtensis, Hedruris orestiae, and Hedruris suttonae), and 1 on turtles (Hedruris dratini). We examined a frog (Pseudis minuta) found dead in the Pescado stream, Argentina, searching for parasites.

Description of n. sp. (Digenea: Haploporidae) from characid fishes in the Iguazu River Basin based on morphological and molecular evidence.

Here we describe a new species of the genus found parasitizing Garavello & Sampaio, (Garavello and Sampaio) and Casciotta, Almirón & Azpelicueta from the Iguazu National Park, Misiones province, Argentina. n. sp.

Molecular phylogenetic relationship between Philometroides tahieli (Nematoda, Philometridae) and other philometrids from South America.

In South America, the family Philometridae is represented by several genera and species. In particular, Philometra and Philometroides are the most speciose genera. In Argentina, only Philometroides tahieli has been reported so far.

Metacercariae in the brain of cf. (Characiformes: Erythrinidae) from Iguazú National Park (Argentina): do they belong to (Digenea, Diplostomidae)?

In Argentina, the family Diplostomidae is composed of eight genera: Szidat & Nani; von Nordmann; Dubois; Lutz; Railliet; Dubois; Dubois; and Diesing. During a parasitological survey of fishes from the Iguazú National Park we detected diplostomid metacercariae in the brain of cf. .