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Re: Chanaresuchus braincase



Congratulations Augusto!



2012/6/26 Augusto Haro <augustoharo@gmail.com>
>
> Not quite dinosaurian, but thanks for the release!
> Cheers,
> Augusto.
>
> 2012/6/26 Ben Creisler <bcreisler@gmail.com>:
> > From: Ben Creisler
> > bcreisler@gmail.com
> >
> > In the new JVP:
> >
> > María J. Trotteyn & José A. Haro (2012)
> > The braincase of Chanaresuchus ischigualastensis (Archosauriformes)
> > from the Late Triassic of Argentina.
> > Journal of Vertebrate Paleontology 32(4):867-882
> > DOI:10.1080/02724634.2012.670178
> > http://www.tandfonline.com/doi/abs/10.1080/02724634.2012.670178
> >
> >
> > ABSTRACT
> > Here, we present information regarding the braincase anatomy of
> > Chanaresuchus ischigualastensis, from the Ischigualasto Formation
> > (Carnian) of Argentina. The braincase is very similar to that
> > previously described for Chanaresuchus bonapartei, but bears some
> > differences: rostral contour of the basal tubera nearly transversely
> > oriented in ventral view; basal tubera with rounded distal tips in
> > ventral view; paroccipital processes with a slight distal widening in
> > caudal view; sulcus on the caudal surface of each paroccipital process
> > restricted to the proximal two-thirds of the latter; and
> > parabasisphenoidal ventral surface transversely concave. A
> > phylogenetic analysis was performed using exclusively neurocranial
> > characters, including a few new characters, to investigate
> > phylogenetic hypotheses suggested by the neurocranial evidence. The
> > neurocranial data support a sister-group relationship between
> > Chanaresuchus ischigualastensis and C. bonapartei, on the basis of the
> > presence of an intertuberal plate with a concave border. Our analysis
> > also suggests the monophyly of a group formed by both species of
> > Chanaresuchus and Proterochampsa. This group was supported by one
> > apomorphy: the paroccipital processes are elongated relative to their
> > height, which did not show homoplasy in our results. Our results show
> > that Doswellia is the sister group of the clade formed by these
> > proterochampsids, supporting inclusion of the former within the
> > Proterochampsia, and this clade is recovered as more closely related
> > to archosaurs than to Euparkeria.




--
“Verrà il giorno in cui l’uccisione di un animale sarà considerata alla
stessa stregua dell’uccisione di un uomo ” Leonardo da Vinci


Rubén Darío Juárez Valieri
some place, some province...Argentina...
rubendjuarez@gmail.com
+5492941346211