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[RECEIVED] Re: Sphenotitan, new sphenodontian (Lepidosauria) from Late Triassic of Argentina




 Thanks all.

Jason



----- Original Message -----
> From: Ben Creisler <bcreisler@gmail.com>
> To: dinosaur@usc.edu
> Cc: 
> Sent: Wednesday, 16 October 2013 10:57 AM
> Subject: Sphenotitan, new sphenodontian (Lepidosauria) from Late Triassic of 
> Argentina
> 
> From: Ben Creisler
> bcreisler@gmail.com
> 
> A new paper:
> 
> Ricardo N. Martínez, Cecilia Apaldetti, Carina E. Colombi, Angel
> Praderio, Eliana Fernandez, Paula Santi Malnis, Gustavo A. Correa,
> Diego Abelin, and Oscar Alcober (2013)
> A new sphenodontian (Lepidosauria: Rhynchocephalia) from the Late
> Triassic of Argentina and the early origin of the herbivore
> opisthodontians.
> Proceedings of the Royal Society: B. 280 20132057
> doi:10.1098/rspb.2013.2057
> http://rspb.royalsocietypublishing.org/content/280/1772/20132057.abstract
> 
> 
> 
> Sphenodontians were a successful group of rhynchocephalian reptiles
> that dominated the fossil record of Lepidosauria during the Triassic
> and Jurassic. Although evidence of extinction is seen at the end of
> the Laurasian Early Cretaceous, they appeared to remain numerically
> abundant in South America until the end of the period. Most of the
> known Late Cretaceous record in South America is composed of
> opisthodontians, the herbivorous branch of Sphenodontia, whose oldest
> members were until recently reported to be from the
> Kimmeridgian–Tithonian (Late Jurassic). Here, we report a new
> sphenodontian, Sphenotitan leyesi gen. et sp. nov., collected from the
> Upper Triassic Quebrada del Barro Formation of northwestern Argentina.
> Phylogenetic analysis identifies Sphenotitan as a basal member of
> Opisthodontia, extending the known record of opisthodontians and the
> origin of herbivory in this group by 50 Myr.
>