Re: It's HERE!!!

["Tim Williams" <twilliams_alpha@hotmail.com>]

Mickey_Mortimer wrote (thanks Mickey!):


On pachycephalosaur phylogeny:

> The synapomorphies cannot be listed due to space limitations, but the 
> >topology is (Stenopelix (Wannanosaurus (Goyocephale (Homocephale, 
> >Ornatotholus (Yaverlandia (Stegoceras ((Prenocephale + Tylocephale) 
> (Stygimoloch + Pachycephalosaurus))))))))

_Yaverlandia_ is back in the Pachycephalosauria?  Last year Sullivan removed 
it from this group, noting that the only pachycephalosaur feature he could 
see in the specimen were the thick frontals; in other respects, the cranium 
was decidedly un-pachycephalosaurian (though Sullivan didn't actually say 
what _Yaverlandia_ might really be).


References

Sullivan, R.M. (2000).  Prenocephale edmontonensis (Brown and Schlaikjer) 
new comb. and P. brevis (Lambe) new comb. (Dinosauria: Ornithischia: 
Pachycephalosauria) from the Upper Cretaceous of North America (R.M. 
Sullivan) 177-190.  In: New Mexico Museum of Natural History and Science 
Bulletin 17, Dinosaurs of New Mexico.



Tim

------------------------------------------------------------

Dr Timothy J. Williams

USDA/ARS Researcher
Agronomy Hall
Iowa State University
Ames IA 50014

Phone: 515 294 9233
Fax:   515 294 3163

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