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RE: Tyrannosauroid material from Uzbekistan



And yet Miyashita (2011) found "A redescription of Itemirus medullaris from the 
Turonian of Uzbekistan supports the hypothesis that this taxon represents a 
relatively derived non-tyrannosaurid tyrannosauroid."  Will be interesting to 
see his analysis, in addition to Sues and Averianov's.  Note Longrich and 
Currie's analysis only included paravians, so could not recover a 
tyrannosauroid position.  No doubt the correct answer is that Russell and Dong 
(1994) were right and dromaeosaurids and tyrannosaurids are sister taxa. ;)

Miyashita, 2011. Cranial morphology of the basal tyrannosauroid Itemirus 
medullaris and evolution of the braincase pneumaticity in non-avian 
coelurosaurs. Journal of Vertebrate Paleontology. SVP 2011 Abstracts. 159.

Mickey Mortimer

----------------------------------------
> Date: Mon, 21 Nov 2011 15:11:58 +1100
> From: tijawi@gmail.com
> To: dinosaur@usc.edu
> Subject: Re: Tyrannosauroid material from Uzbekistan
>
> bh480@scn.org <bh480@scn.org> wrote:
>
> > Alexander Averianov & Hans-Dieter Sues (2011)
> > Skeletal remains of Tyrannosauroidea (Dinosauria: Theropoda) from the
> > Bissekty Formation (Upper Cretaceous: Turonian) of Uzbekistan.
> > Cretaceous Research (advance online publication)
> > doi:10.1016/j.cretres.2011.11.009
> > http://www.sciencedirect.com/science/article/pii/S019566711100187X
>
>
> The paper also features this tantalizing snippet regarding _Itemirus
> medullaris_, from the Bissekty Formation:
>
>
> "_Itemirus_ has sometimes been classified as a tyrannosauroid
> (e.g., Holtz, 2004), but newly collected material indicates that
> it is, in fact, referable to Dromaeosauridae (Sues and Averianov,
> in preparation)."
>
>
> It should be noted that _Itemirus_ was found to be a dromaeosaurid (a
> velociraptorine, no less) in the phylogenetic analysis of Longrich and
> Currie (2009), in their description of _Hesperonychus_. But the
> prospect of new _Itemirus_ material is exciting.
>
>
>
>
>
>
> Cheers
>
> Tim