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Re: Phytodinosauria status



In a message dated 6/6/01 8:53:51 PM EST, Mickey_Mortimer11@email.msn.com 
writes:

<< Also, I see no reason ornithischians would have to evolve dinosaurian
 characters independently of saurichians, as the near-universal consensus is
 that Dinosauria is monophyletic and the two are sister groups. >>

For one thing, ornithischians have to lose the fifth toe independently of the 
saurischians, since sauropods still have it. Not impossible, of course, but 
it makes you wonder.

How odd to group obligatory quadrupedal dinosaurs with obligatory bipedal 
dinosaurs, and leave facultatively bipedal dinosaurs outside these groups 
instead of between them, where you might readily expect them to go.