%0 Journal Article
%T Descripci¨®n de una nueva especie de bagre marino f¨®sil (Teleostei, Siluriformes, Ariidae) del Mioceno de la provincia de R¨ªo Negro, Argentina
%A Bogan
%A Sergio
%A Agnolin
%A Federico L.
%J Pap¨¦is Avulsos de Zoologia (S£¿o Paulo)
%D 2011
%I USP
%R 10.1590/S0031-10492011002500001
%X 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, r¨ªo 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.
%K siluriformes
%K ariidae
%K genidens
%K gran bajo del gualicho formation
%K patagonia.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0031-10492011002500001&lng=en&nrm=iso&tlng=en