Re: Olorotitan paper published

[Mike Taylor <mike@indexdata.com>]

> Date: Fri, 02 May 2003 14:56:37 +0200
> From: Markus Moser <m.moser@lrz.uni-muenchen.de>
> 
> Pascal Godefroit, Yuri Bolotsky & Vladimir Alifanov (2003): A
> remarkable hollow-crested hadrosaur from Russia: an Asian origin for
> lambeosaurines. - C. R. Palevol Vol 2, Issue 2: 143?151. (March
> 2003).
> 
> Abstract
> The nearly complete skeleton of a new lambeosaurine dinosaur,
> Olorotitan arharensis, has been discovered in the Maastrichtian
> Tsagayan Formation at Kundur, Far Eastern Russia.
> [...]
> Phylogenetic analysis shows that Olorotitan is the sister-taxon of
> the North American genera Corythosaurus and Hypacrosaurus.
> Lambeosaurines originated from Asia and then migrated to North
> America before or at the beginning of the Late Campanian.

Eh?  How does a Maastrichtian-age specimen show _that_?

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