Re: Pegomastax, new heterodontosaurid from South Africa in new Sereno monograph (free pdf!)

[William Parker <saurian55@gmail.com>]

I cannot get the PDF to download.  I keep getting "plug-in" errors. Is
anyone else having the same problem or is it on my end?

Thanks

Bill

On Wed, Oct 3, 2012 at 9:19 AM, Ben Creisler <bcreisler@gmail.com> wrote:
> From: Ben Creisler
> bcreisler@gmail.com
>
> A new taxon in a new monograph at ZooKeys site. The pdf is free!
>
> Paul Sereno (2012)
> Taxonomy, morphology, masticatory function and phylogeny of
> heterodontosaurid dinosaurs.
> ZooKeys 224: 1-225.
> doi: 10.3897/zookeys.224.2840
> http://www.pensoft.net/journals/zookeys/article/2840/taxonomy-morphology-masticatory-function-and-phylogeny-of-heterodontosaurid-dinosaurs
>
>
> Heterodontosaurids comprise an important early radiation of
> small-bodied herbivores that persisted for approximately 100 My from
> Late Triassic to Early Cretaceous time. Review of available fossils
> unequivocally establishes Echinodon as a very small-bodied,
> late-surviving northern heterodontosaurid similar to the other
> northern genera Fruitadens and Tianyulong. Tianyulong from northern
> China has unusual skeletal proportions, including a relatively large
> skull, short forelimb, and long manual digit II. The southern African
> heterodontosaurid genus Lycorhinus is established as valid, and a new
> taxon from the same formation is named Pegomastax africanus gen. n.,
> sp. n. Tooth replacement and tooth-to-tooth wear is more common than
> previously thought among heterodontosaurids, and in Heterodontosaurus
> the angle of tooth-to-tooth shear is shown to increase markedly during
> maturation. Long-axis rotation of the lower jaw during occlusion is
> identified here as the most likely functional mechanism underlying
> marked tooth wear in mature specimens of Heterodontosaurus. Extensive
> tooth wear and other evidence suggests that all heterodontosaurids
> were predominantly or exclusively herbivores. Basal genera such as
> Echinodon, Fruitadens and Tianyulong with primitive, subtriangular
> crowns currently are known only from northern landmasses. All other
> genera except the enigmatic Pisanosaurus have deeper crown proportions
> and currently are known only from southern landmasses.
>
> new release with video:
> http://phys.org/news/2012-10-fanged-dwarf-dinosaur-southern-africa.html
>
> (NOTE: One glitch in the name :  mastax "jaw" is feminine in Greek so
> the name should be Pegomastax africana to follow the letter of the
> rules.)