Descripción de una nueva especie de bagre marino fósil (Teleostei, Siluriformes, Ariidae) del Mioceno de la provincia de Río Negro, Argentina
DOI:
https://doi.org/10.1590/S0031-10492011002500001Keywords:
Siluriformes, Ariidae, Genidens, Gran Bajo del Gualicho Formation, PatagoniaAbstract
Two fossil crania referable to the siluriform fish family Ariidae are described. The specimens come from the Early Late Miocene-Lower Middle Miocene Saladar Member of the Gran Bajo del Gualicho Formation, located at Salinas del Gualicho, Río Negro province, Argentina. The materials are referred to a new species of the recent genus Genidens. The new taxon is distinguished from remaining living species in having a very short, broadened and rounded supraoccipital process, subrounded extrascapular and wide mesethmoid with a median notch, flat frontals, and straight lateral margins of the sphenotics. Genidens ancestralis sp. nov. represents the oldest (and only known) fossil record for the genus, and constitutes a relatively small-sized species, very similar in general traits to living forms of Genidens.Downloads
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Published
2011-01-01
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Responsibility: The scientific content and the opinions expressed in the manuscript are the sole responsibility of the author(s).
Copyrights: Papéis Avulsos de Zoologia. The journal is licensed under a Creative Commons attribution-type CC-BY.
How to Cite
Bogan, S., & Agnolin, F. L. (2011). Descripción de una nueva especie de bagre marino fósil (Teleostei, Siluriformes, Ariidae) del Mioceno de la provincia de Río Negro, Argentina . Papéis Avulsos De Zoologia, 51(25), 373-382. https://doi.org/10.1590/S0031-10492011002500001