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RE: Xixiasaurus, new troodontid from China

Ben Creisler wrote:

<In case this paper has not been mentioned yet:

Lü, J.-C., Xu, L., Liu, Y.-Q., Zhang, X.-L., Jia, S. and Ji, Q. 2010. A new 
troodontid (Theropoda: Troodontidae) from the Late Cretaceous of central China, 
and the radiation of Asian troodontids. Acta Palaeontologica Polonica 5X: 
xxx-xxx. doi: 10.4202/app.2009.0047


A new troodontid dinosaur, Xixiasaurus henanensis gen. et sp. nov., from the 
Upper Cretaceous Majiacun Formation of Xixia Basin, Henan Province, is erected, 
based on a partial skull.>

  It's based on a very, very well preserved rostrum and partial dentary with 
incomplete forelimb. The rostrum introduces some features that indicate a 
complex dietary function, with small, numerous unserrated teeth, a rounded 
mesial region of the snout, and a very extensive secondary bony palate where 
the maxillae remain in contact with one another medially very far back (past 
the anterior rim of the antorbital fenestra). Maxillary interdental plates are 
variably fused to one another, with posterior plates preserving a distinct 
suture whereas anteriorly they are continuous without apparent sutures.

  Lü et al. propose that the new taxon is closely associated with 
*Byronosaurus* and forms a clade with it and *Urbacodon*.


Jaime A. Headden

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> Date: Sat, 20 Feb 2010 15:59:04 +0000
> From: bh480@scn.org
> To: dinosaur@usc.edu
> Subject: Xixiasaurus, new troodontid from China
> From: Ben Creisler bh480@scn.org
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