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

BRIÑOCCOLI YANINA; BOGAN, SERGIO; J. MELUSO; CARDOSO, YAMILA P.

Rev. Mus. Argentino Cienc.

Rev. Mus. Argentino Cienc.

Año: 2018

1514-5158

The genus Rhamdella is included in the family Heptapteridae and comprises six species distributed in Argentina, Brazil and Bolivia. Rhamdella aymarae was originally described from the Itiyuro river, an arheic ba- sin 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 first time Rhamdella aymarae from the Pilcomayo river Basin and extend its distribution to the province of Santiago del Estero. We perform a phylogenetic reconstruction based on mitochondrial marker coI, which allowed to cor- roborate the taxonomic assignment of the studied specimens and showed that Rhamdella is not a monophyletic group. this contribution shows evidence that the relationships between genera of the family Heptapteridae re- quire more detailed studies to define their classification.