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Re: Zaraapelta, new ankylosaur from Late Cretaceous of Mongolia (free pdf)



The paper is now in open access with a free pdf.

On Mon, Oct 27, 2014 at 9:36 AM, Ben Creisler <bcreisler@gmail.com> wrote:
> Ben Creisler
> bcreisler@gmail.com
>
>
> A new paper:
>
> Victoria M. Arbour, Philip J. Currie and Demchig Badamgarav (2014)
> The ankylosaurid dinosaurs of the Upper Cretaceous Baruungoyot and
> Nemegt formations of Mongolia.
> Zoological Journal of the Linnean Society 172(3): 631–652
> DOI: 10.1111/zoj.12185
> http://onlinelibrary.wiley.com/doi/10.1111/zoj.12185/abstract
>
>
> The discovery of a new ankylosaurid skull with some unusual features
> from the Baruungoyot Formation of Mongolia prompted a systematic
> review of ankylosaurid specimens from the Baruungoyot and Nemegt
> formations. Dyoplosaurus giganteus was found to possess no diagnostic
> features and is regarded as a nomen dubium. The holotype of Tarchia
> kielanae (previously synonymized with Tarchia gigantea) has one
> autapomorphy, an accessory postorbital ossification with surrounding
> furrow, and Tar. kielanae is here considered a valid species, making
> the combination Tar. gigantea unnecessary. An accessory postorbital
> ossification is also found in the holotype of Minotaurasaurus
> ramachandrani, and this species is here considered a junior synonym of
> Tar. kielanae. The newly described skull from the Baruungoyot
> Formation forms the holotype of a new genus and species, Zaraapelta
> nomadis gen. et sp. nov., diagnosed by unusual bilayered ornamentation
> on the squamosal horn and extensive postocular ornamentation. Two
> distinct tail club handle morphotypes are present in the Nemegt
> Formation and probably represent two different species. However, it is
> impossible to assign either tail club morphotype to the single valid
> species from the formation, Saichania chulsanensis, because of a lack
> of overlapping material. A revised phylogenetic analysis including
> newly identified characters found Zaraapelta nomadis to be most
> closely related to Tar. kielanae.