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RE: Spinosaurus Question

John Hunt wrote:

Your information is correct and what little was found was destroyed in WW2
leaving just photos of the mounted bones and the published description.

But related species have been found and have much more of the bones
preserved. These have been described as facultive bipeds but there was some
doubt about Baryonyx when it was first described. No such doubts about
Suchomimus afaik. These may be synonymous. There are other spinosaurs that
have been described since.

That's exactly what I would have said.

One potential 'fly-in-the-ointment' is that there is a possibility that the type for _Spinosaurus aegyptiacus_ is a composite: the cranial material and dorsal vertebrae might each come from a different animal. (This has happened with other North African dinosaurs.) The _Spinosaurus_ snout is certainly like that of _Baryonyx_ and _Suchomimus_, but the dorsal vertebrae may belong to a different taxon. Still, the snout and dorsals all come from a VERY large theropod, which provides some evidence that they come from the same critter.


Rauhut, O. W. M. (2003). The interrelationships and evolution of basal theropod dinosaurs. Special Papers in Palaeontology 69: 1-213.



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