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Re: Defining Ornithischia (was Re:)



I have not read the article in question, however, if someone could
re-hash the support for placing Effigia and Lotosaurus within the
Ornithischia as opposed to being pseudosuchians, I would be very
interested.

Nick Gardner

On 9/17/07, Guy Leahy <xrciseguy@sbcglobal.net> wrote:
> Some authors would further expand/subdivide
> Ornithischia.  For example, in two issues of the
> popular magazine Prehistoric Times (Issues # 80 and #
> 81:
>
> http://www.prehistorictimes.com/backissue.html
>
> David Peters has written articles where he groups
> *Lotosaurus*, *Effigia*, *Sacisaurus* and *Silesaurus*
> together as a subclade within Ornithischia.  Mr.
> Peters coins the term "Paraornithischia" for this
> subclade.  Mr. Peters defines "Paraornithischia" as
> ornithischians which possess a predentary bone, but do
> not have retroverted pubes.
>
> Guy Leahy