The estimate divergence time for extant taxa based on molecules usually exceed the age of their oldest fossil evidence; a situation that turtles do not scape. An extant genus with this situation, and thus having a controversial oldest record is Podocnemis Wagler, 1830. Here we present a new fossil turtle that constitutes a new species for this genus and represents its oldest so far known record, from the Miocene (Serraval- lian) of La Tatacoa Desert, Colombia. The new taxon named Podocnemis tatacoensis n. sp. shares with all extant members of Podocnemis a nuchal bone wider than long; lateral musk foramina at the hyoplastron- peripherals (except P. sextuberculata Cornalia, 1849), pectoral scales do not contact mesoplastra, but do contact entoplastron and epiplastra. We explored the phylogenetic position of P. tatacoensis n. sp. find- ing support for its inclusion as part of Podocnemis clade, particularly in a clade composed by the extant P. unifilis Troschel, 1848, suggesting a potential closer relationship of the new fossil taxon with this taxon.
|Translated title of the contribution||Un nuevo fósil termina la controversia sobre la ocurrencia del género actual Podocnemis Wagler, 1830 en la fauna del Mioceno, Colombia|
|Number of pages||138|
|State||Published - Feb 23 2023|
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