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Re: Huehuecanauhtlus tiquichensis, new Santonian hadrosauroid

In lieu of a pronunciation guide, I think I'll call this fellow 'Huey' for 
short. :-)

On Thu, Feb 16th, 2012 at 11:23 AM, Jay <jayp.nair@yahoo.com> wrote:

> Huehuecanauhtlus tiquichensis
> Ramírez-Velasco AA, Benammi M, Prieto-Márquez A, Ortega JA, Hernández-Rivera 
> R (2012)
> Huehuecanauhtlus tiquichensis, a new hadrosauroid dinosaur (Ornithischia: 
> Ornithopoda) from the
> Santonian (Late Cretaceous) of Michoacán, Mexico. Canadian Journal of Earth 
> Sciences 49(2):
> 379-395.
> http://www.nrcresearchpress.com/doi/abs/10.1139/e11-062
> Huehuecanauhtlus tiquichensis gen. et sp. nov. is the southernmost diagnostic 
> basal hadrosauroid
> in the Americas. The holotype and referred material of this taxon came from 
> Santonian strata in
> the Michoacán State, southwestern Mexico. Huehuecanauhtlus tiquichensis is 
> diagnosed on the 
> of a combination of dental, axial, and appendicular characters, including the 
> following: at least
> two teeth exposed on the occlusal plane of the dentary and maxilla; seven 
> sacral vertebrae; tall
> neural spines of caudal vertebrae; supraacetabular process long; and short 
> and trapezoidal (in
> lateral view) postacetabular process. It differs from other hadrosauroids in 
> having an ilium with
> extreme ventral deflection of the preacetabular process. Maximum 
> parsimony cladistic analysis placed H. tiquichensis as a closely related 
> outgroup to
> Hadrosauridae. The occurrence of H. tiquichensis in the Santonian of North 
> America may be
> explained as a dispersal event from Asia to North America that occurred no 
> later than the Albian
> or, alternatively, as a vicariant event of a most recent common ancestor 
> widespread in both
> landmasses.


Dann Pigdon
Spatial Data Analyst               Australian Dinosaurs
Melbourne, Australia               http://home.alphalink.com.au/~dannj