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Re: Viavenator, new abelisaurid theropod from Upper Cretaceous of Argentina



More on Viavenator (click on image to expand) (in Spanish)

http: // 
paleosur.blogspot.com/2016/02/a-new-theropod-dinosaur-from-patagonia.html

On Wed, Feb 10, 2016 at 12:52 PM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
>
> A new paper.
> Thanks to Rubén Darío Juárez Valieri for bringing this paper to my attention.
>
>
> Leonardo S. Filippi, Ariel H. Méndez, Rubén D. Juárez Valieri &
> Alberto C. Garrido (2016)
> A new brachyrostran with hypertrophied axial structures reveals an
> unexpected radiation of latest Cretaceous abelisaurids.
> Cretaceous Research 61: 209–219
> doi:10.1016/j.cretres.2015.12.018
> http: // www.sciencedirect.com/science/article/pii/S0195667115301439?np=y
>
> A well preserved skeleton of a new abelisaurid is reported here. The
> holotype of Viavenator exxoni was found in the outcrops of the Bajo de
> la Carpa Formation (Santonian, Upper Cretaceous), northwestern
> Patagonia, Argentina. This new taxon belongs to the South American
> clade of abelisaurids, the brachyrostrans. The current phylogenetic
> analysis places it as the basalmost member of a new clade of derived
> brachyrostrans, named Furileusauria, characterized by distinctive
> cranial, axial and appendicular anatomical features. The Santonian age
> of Viavenator allows filling the stratigraphic gap exhibited between
> the basal brachyrostrans of Cenomanian–Turonian age, and the derived
> forms from the Campanian-Maastrichtian. The evolution of abelisaurids
> during the Late Cretaceous, faunal replacements, and the adaptive
> radiation that occurred during that period of time in South America
> are discussed.