Phylogenetic reconstruction shows Rhamdella is polyphyletic. Includes expanded range/distribution notes

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Phylogenetic reconstruction shows Rhamdella is polyphyletic. Includes expanded range/distribution notes

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BRIÑOCCOLI, Y.F., BOGAN, S., MELUSO, J.M., & CARDOSO, Y.P. (2018). Update of the distribution of Rhamdella aymarae (Siluriformes: Heptapteridae). Rev. Mus. Argentino Cienc. Nat., n.s., 20(2): 323-332, 2018.

https://www.researchgate.net/publication/329718300

https://www.researchgate.net/profile/Se ... eridae.pdf

BRIÑOCCOLI, Y.F., BOGAN, S., MELUSO, J.M., & CARDOSO, Y.P. (2018). Actualización de la distribución de Rhamdella aymarae (Siluriformes: Heptapteridae). Rev. Mus. Argentino Cienc. Nat., n.s., 20(2): 323-332, 2018.

ABSTRACT
The genus Rhamdella is included in the family Heptapteridae and comprises six species distributed in Argentina, Brazil and Bolivia. 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 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 corroborate 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 require more detailed studies to define their classification.
Key words: Heptapterids, Urueña, Itiyuro, Pilcomayo, Biogeography.
RESUMEN
El género Rhamdella está incluido en la familia Heptapteridae e integrado por seis especies distribuidas en Argentina, Brasil y Bolivia. fue descripta originalmente para la cuenca arreica del río Itiyuro, en el norte de Salta, Argentina. Según una propuesta filogenética basada en caracteres morfológicos R. aymarae y R. rusbyi son el grupo hermano de las especies restantes de este género. En este artículo citamos por primera vez la presencia de Rhamdella aymarae para la cuenca del río Pilcomayo y extendemos su distribución a la provincia de Santiago del Estero. Realizamos también una reconstrucción filogenética basada en el marcador mitocondrial COI, la cual permitió corroborar la asignación taxonómica de los ejemplares estudiados y demostró que el género Rhamdella no es un grupo monofilético. Esta contribución muestra evidencia de que las relaciones entre los géneros de la familia Heptapteridae requieren de estudios más detallados para definir su clasificación.
Palabras clave: Heptapteridos, Urueña, Itiyuro, Pilcomayo, Biogeografía.
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Re: Phylogenetic reconstruction shows Rhamdella is polyphyletic. Includes expanded range/distribution notes

Post by Lycosid »

I have to say that this looks more like "Rhamdella zelimai isn't Rhamdella" rather than "Rhamdella is a lie".
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Re: Phylogenetic reconstruction shows Rhamdella is polyphyletic. Includes expanded range/distribution notes

Post by bekateen »

Lycosid wrote: 17 Jan 2019, 01:21I have to say that this looks more like "Rhamdella zelimai isn't Rhamdella" rather than "Rhamdella is a lie".
Perhaps, but there's about 7 other Rhamdella species not shown on this tree. Where do they fall? And what's up with the Pimelodella? There's over 80 species of those to account for, but only 7 are shown on this tree.

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Eric
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