Re: Mystery theropod from Argentina

[Tim Donovan <uwrk2@yahoo.com>]

--- Nick Pharris <npharris@umich.edu> wrote:
> Quoting Tim Donovan <uwrk2@yahoo.com>:
> 
> >   Can we be sure North and South America were
> really
> > separated in the Campanian? By then titanosaurs of
> > presumed South American origin had appeared in
> North
> > America.
> 
> But _Opisthocoelicaudia_ is also in the same part of
> the titanosaur tree, so
> there is a possibility that _A._ came from Asia,
> rather than South America.


 Lucas and Hunt argued strongly for a South American
origin of Alamosaurus in GSA special paper 238 (1989).
Btw, on the subject of tyrannosaur-like remains from
South America, does anyone else remember a similar
report about a dozen years ago in DINOSAURS A GLOBAL
VIEW? I don't know where Czerkas got that information.
He might have meant Genyodectes but the tyrannosaurid
affinities of that were in doubt years before the book
was published.

> 
> 



                
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