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Re: Laelaps and Brontosauria (was Re: Resending)

--- Tim Williams <twilliams_alpha@hotmail.com> wrote:

> AFAIK, _Metriacanthosaurus_ is difficult to pin down phylogenetically owing 
> (in part) to the incompleteness of the material.  Other theropods have been 
> touted as possible "sinraptorids", such as _Siamotyrannus_ and 
> _Marshosaurus_.  I don't think it's advisable to anchor any suprageneric 
> clade in the genus _Metriacanthosaurus_.  Sinraptoridae could be defined as 
> something like "theropods closer to _Sinraptor_ than to _Allosaurus_ or 
> _Torvosaurus_".

If Yanchaunosaurus is more closly related to Carcharodontosauridae than to 
Allosaurus, then the
above suggested definition could come to include all allosauroids excluding 
Allosaurus. An
alternative definition could be "theropods closer to _Sinraptor_ than to 
_Allosaurus_ or _Carcharodontosauridae_".

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