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Re: Haplocheirus (alvarezsauroid theropod) skull anatomy

The AMNH free pdf link is now up.


On Wed, Oct 22, 2014 at 12:36 PM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
> A new paper. The AMNH open access link is not yet posted.
> Jonah N. Choiniere, James M. Clark, Mark A. Norell, and Xing Xu (2014)
> Cranial Osteology of Haplocheirus sollers Choiniere et al., 2010
> (Theropoda: Alvarezsauroidea)
> American Museum Novitates Number 3816 :1-44. 2014
> doi: http://dx.doi.org/10.1206/3816.1
> http://www.bioone.org/doi/abs/10.1206/3816.1
> The basalmost alvarezsauroid Haplocheirus sollers is known from a
> single specimen collected in Upper Jurassic (Oxfordian) beds of the
> Shishugou Formation in northwestern China. Haplocheirus provides
> important data about the plesiomorphic morphology of the theropod
> group Alvarezsauroidea, whose derived members possess numerous
> skeletal autapomorphies. We present here a detailed description of the
> cranial anatomy of Haplocheirus. These data are important for
> understanding cranial evolution in Alvarezsauroidea because other
> basal members of the clade lack cranial material entirely and because
> derived parvicursorine alvarezsauroids have cranial features shared
> exclusively with members of Avialae that have been interpreted as
> synapomorphies in some analyses. We discuss the implications of this
> anatomy for cranial evolution within Alvarezsauroidea and at the base
> of Maniraptora.
> ====
> AMNH link
> http://digitallibrary.amnh.org/dspace/handle/2246/9