Re: Gondawanan dinosaurs

[João Simões Lopes Filho <jodan99@uol.com.br>]

----- Original Message ----- >
> I can't speak for Joao, but when I referred to nodosaurs in my reply to
his
> original message I meant non-ankylosaurine ankylosaurians, as nodosaurids,
> polacanthines and more basal types are currently hard to distinguish based
> on fragmentary remains and are often simply called nodosaurs in the
> literature.  We need an in depth study of ankylosaur systematics before we
> can assign most nodosaurs to a specific family.
> > Mickey Mortimer>

I agree with Mortimer. When I say nodosaur, I'm saying just a primitive kind
of Ankylosauria. I don't know the current systematics, because the
cladograms are ever changing.
There was ankylosaurs-nodosaurs at Upper Jurassic. There was Pangaea, so
they ought to be worldwide.
Perhaps an Asiatic or Asiamerican branch gave rise to ankylosaurids.
A Gondwanan branch are still poorly known, but surely it existed.
The problems are the wide gaps in our knowledge. What are the mainly
Maastrichtian Formations around the world that provided dinosaur fossil?
Western North America, West Europe, Argentina, Uruguay, India, China,
perhaps North Africa. (please complete if I'm wrong...)

Joao