Re: Tyrannosaur Evolution and Bagarataan

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

>  AFAIK, saurolophines are unknown from the apparently
> Djadokhtan equivalent beds at Laiyang.

How many dinosaurs in total have been found there so far? Does that number 
give us a reason to think that we'd already have discovered saurolophines if 
any were present?

> It is likely IMO that the sauroloph niche was already
> occupied in Asia by Keberosaurus to almost mid
> Maastrichtian, and the Tsagayan types were then
> supplanted by American immigrants.

What do you suggest that that niche was?