RE: II CLPV talk summaries: Day 2

[Tim Williams <twilliams_alpha@hotmail.com>]

Michael Mortimer wrote:

> Well, the tooth isn't shuvosaurid (though the edentulous premaxilla found 
> nearby probably is).

It was the opinion of Carpenter (1997) that the edentulous premaxilla indeed 
belongs to _Shuvosaurus_.

> Wouldn't it be funny if what we had here was the return of dinosaurian 
> polyphyly?
> Theropods from shuvosaurid suchians...
> Sauropodomorphs from Azhendohsaurus-like basal archosaurs...
> Ornithischians from silesaurid 'avemetatarsalians'...

Hey, that last one may be right!  If silesaurids are indeed basal 
dinosauromorphs (or dinosauriforms), and are closer to ornithischians than 
to other dinosaurs, then the Dinosauria would include silesaurids.  In the 
even remoter possibility that the other two are also correct 
(theropods-from-shuvosaurs, sauropodomorphs-from-basal archosaurs), then 
Dinosauria would still remain monophyletic, courtesy of its definition - it 
would just be expanded to include most of the Archosauria!

Doesn't all this make you want to have another look at _Pisanosaurus_?  ;-)

> > Or rauisuchian, right?
>
> Oh yeah.  Spondylosoma.

According to Langer (2004), the hypodigm of _Spondylosoma_ may contain 
genuine dinosaur material.

> > Er... what has *Azendohsaurus* turned out to be?
>
> See Jalil 2002 (SVP) and Parrish 2003 (SVPCA).

I know Jalil and Knoll (2002) put _Azendohsaurus_ outside the Dinosauria, 
but do they (or Parrish) say what it might be.

> Incidentally, does this leave Chatterjee with any taxa he described as 
> dinosaurs still being dinosaurian?
> Technosaurus - sliesaurid.
> Alwalkeria- chimaera.
> Protoavis - chimaera.
> Shuvosaurus - suchian.

_Alwalkeria_ and _Protoavis_ may contain dinosaurian (theropod?) elements; 
but as the hypodigms for both do appear to be chimeric, I'm not sure which 
particular element gets to carry the name of the genus.  I fits the cranial 
material, then neither genera would appear to be dinosaurs.

_Barapasaurus_ was named and described by Jain, Kutty, Roy-Chowdhury and 
Chatterjee (1975).  It appears to be safe within the Dinosauria.  :-)

Cheers

Tim