Re: Ornithomimid beaks

["David Marjanovic" <david.marjanovic@gmx.at>]

> Beaks appear to have evolved at least three times within _Theropoda_ (all
> within _Maniraptoriformes_): once in _Ornithomimosauria_, once in
> Clade(_Oviraptor_ <-- _Passer_) (which includes _Therizinosauria_), and
> once within _Aves_. It is not certain whether _Avimimidae_ and
> _Alvarezsauria_ belong to one of these groups or evolved beaks
> independently.

This implies that *Protarchaeopteryx*, *Sinornis* and other basal
pygostylians and probably *Archaeopteryx* had beaks -- improbable IMHO. Is
there any evidence for beaks in alvarezsaurs?

> _Shuvosaurus_ may be a toothless basal theropod. Is it supposed to have
> had a beak?

Sure, I mean, it is toothless...