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Re: tyrannosaurs and sauropods
Raymond Ancog wrote:
Stephen and Sylvia Czerkas hint at a possible encounter between
tyrannosaurs and sauropods in their book "Dinosaurs: A Global View." In the
Late Cretaceous, N & S America were briefly connected, and possibly Eurasia
and Africa. That would have allowed the northern tyrannosaurs to migrate to
the south and meet the sauropods
As far as I know, there's no good evidence that _Tyrannosaurus_ lived in the
southern USA. _Tyrannosaurus_ bones in the South are about as rare as
Democrats, and any material (like the maxilla from Javelina/Tornillo Fm of
Texas) is dubiously _Tyrannosaurus_. There are tyrannosaurid bones from New
Mexico (?Maastrichtian), currently referred (provisionally) to _Aublysodon_.
The material is so badly preserved that it COULD be subadult _T. rex_.
Recent cladistic analyses seem to suggest that _Alamosaurus_ is most closely
related to S. American titanosaurs like _Saltasaurus_. But _Alamosaurus_ is
a poorly known genus, and since there are at least two Early Cretaceous
titanosaurs from N. America (_Pleurocoelus_ and one to be named), there is a
possibility that _Alamosaurus_ was home-grown.
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