Re: Pterosaur size (Was: Great in the air, not so good underwater)

[Tim Williams <twilliams_alpha@hotmail.com>]

Jamie Stearns wrote:

> Then again, there are lineages that actually decrease in size over the 
> Cretaceous, not just titanosaurs, but dromaeosaurs are another example; 
> compare Utahraptor and Deinonychus from the EK to Bambiraptor and 
> Saurornitholestes from the LK. Though I  can't recall exactly when 
> Achillobator lived; that might throw the pattern off.

_Achillobator_ is a Bayen Shireh taxon, so maybe Cenomanian or Santonian 
(based on magnetostratigraphy).

Of course, if you throw the EK microraptorans into the mix, then these 
little guys would have a big impact on any calculations.

Cheers

Tim

_________________________________________________________________
Talk now to your Hotmail contacts with Windows Live Messenger. 
http://clk.atdmt.com/MSN/go/msnnkwme0020000001msn/direct/01/?href=http://get.live.com/messenger/overview