Hemiuroidean trematodes from freshwater Patagonian fishes: description of a new species, distribution and molecular phylogeny

TSUCHIDA, K.; FLORES, VERÓNICA R.; VIOZZI, G.; RAUQUE, C. A.; URABE, M.

PARASITOLOGY RESEARCH

SPRINGER

Lugar: Berlin; Año: 2021

0932-0113

A new trematode species, Derogenes lacustris Tsuchida, Flores, Viozzi, Rauque et Urabe n. sp. (Derogenidae: Derogeninae),from freshwater fishes is described using morphological and molecular approaches in Argentinean Patagonia. D. lacustris is themost common hemiuroidean species in the Limay River basin and parasitizes almost all the native and introduced Patagonianfreshwater fish. This new species could be considered as the unique freshwater species in the genus Derogenes Nicoll, 1910.Another hemiuroidean species, Thometrema patagonica Szidat (Archiev Hydrobiol 51: 542?577, 1956) Lunaschi et Drago 2000(Derogenidae: Halipeginae), is found from Percichthys trucha (Perciformes) in the Neuquén River basin. Its diagnosis andmolecular data are provided by the present study. In the molecular analysis of the Patagonian hemiuroideans, T. patagonicacomposes a group with halipeginean species in the phylogenetic tree of 28S rDNA sequences, while D. lacustris is not includedin the same group. D. lacustris also shows low intraspecific variation in COI sequences regardless of the localities or host species.