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.

Hippocrepis fuelleborni (Digenea: Notocotylidae) from Argentina, morphological, molecular and phylogenetic studies.

Notocotylidae is a family with a cosmopolitan distribution, with 13 genera parasitizing birds and mammals. Four of these genera were registered in the Americas, and two parasitizing rodents in Argentina. In this paper, specimens of the genus Hippocrepis parasitizing Holochilus brasiliensis from Argentina are studied on the basis of morphological and molecular characteristics.

Morphological and genetic analysis of a rediscovered sp. parasitising and (Cyprinodontiformes: Rivulidae).

Clinostomids are a group of digeneans in which substantial diversity has been recently discovered, with some metacercariae specific to their fish hosts. Genetic analysis has been instrumental in elucidating species diversity within this genus. Recently, seven COI lineages were reported in Argentina, along with three metacercarial morphotypes lacking molecular data.

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.

Phylogenetic position of the Neotropical Family Zonocotylidae (Paramphistomoidea) using partial 28S rDNA sequences.

Six families belonging to the Paramphistomoidea superfamily have been reported in South America, with only Zonocotylidae and Balanorchiidae being endemic. The Zonocotylidae was initially classified as Aspidogastrea and then as a paramphistomoid. This family comprises a single genus, , with two species.