Actualización de la distribución de Rhamdella aymarae (Siluriformes: Heptapteridae)

BRIÑOCCOLI, Y.F.; CARDOSO, Y.P.; MELUSO, J.M.; BOGAN, S.

Revista del Museo Argentino de Ciencias Naturales

Museo Argentino de Ciencias Naturales

Lugar: Buenos Aires; Año: 2018 vol. 20 p. 323 - 332

1514-5158

The genus Rhamdella is included in the family Heptapteridae and comprises six species distributed inArgentina, Brazil and Bolivia. Rhamdella aymarae was originally described from the Itiyuro River, an arheic basin in the North of Salta, Argentina. According to a proposed phylogenetic based on morphological characters, R.aymarae and R. rusbyi are the sister group of remaining species of this genus. In this article, we report for the firsttime Rhamdella aymarae from the Pilcomayo River Basin and extend its distribution to the province of Santiagodel Estero. We perform a phylogenetic reconstruction based on mitochondrial marker COI, which allowed to corroborate the taxonomic assignment of the studied specimens and showed that Rhamdella is not a monophyleticgroup. This contribution shows evidence that the relationships between genera of the family Heptapteridae require more detailed studies to define their classification