Re: Deinosuchus and Tyrannosaurus

[Joshua Dyal <j-dyal@geocities.com>]

Joshua Dyal wrote:
> 
> Dinogeorge@aol.com wrote:
> 
> > Dorsal scutes are a primitive feature for practically all of Archosauria, 
> > and
> > crocs retain this feature presumably because it is useful to have the back
> > protected. It could well have arisen in early archosaurs for protection from
> > above from larger predators, such as therapsids. (Incidentally, therapsids
> > did not have dorsal scutes. Although I'm not terribly familiar with the
> > group, I can't recall any dorsally armored therapsids. This is probably why
> > they were able to evolve finbacks and such.)
> 
> Weren't there some fragmentary remains found of "primitive" archosaurs
> with scales, however?  I'm a bit hazy on this, but I know I heard it
> somewhere.
> 
> Joshua Dyal
> j-dyal@geocities.com


Of course, I meant SAILS, not scales.  Ahem...

-- 
Joshua Dyal
j-dyal@geocities.com