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RE: Catch-22





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> Date: Sun, 4 Dec 2011 00:27:42 +0100
> From: david.marjanovic@gmx.at
> To: dinosaur@usc.edu
> Subject: Re: Catch-22

> > Unfortunately, merely using a tree as refuge is not an arboreal or
> > even scansorial lifestyle. E.g., bears are not "arboreal"...
>
> Bears do, however, have plenty of "adaptations" for climbing. It just so
> happens that, in terms of their evolutionary history, they aren't
> adaptations; some are mammalian plesiomorphies (like the fairly short
> but not too short limbs and their wide ranges of movement), others are
> probably exaptations. Many of these character states do not occur in the
> theropods we're talking about.
 
 Depends how seriously you take the more extreme interpretations of the 
Secondarily Flightless school.  (bears evolved from an arboreal ancestor - not 
so sure about T.rex)   :D
 
 
> Brian Choo's painting of *Microraptor* hunting birds shows it high up in
> the crown of a tree, where the branches are thin. How did it get there
> in the first place?
 
 dropped down from a taller tree?