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Re: Say this slowly: theropoda is paraphylitic, theropoda is paraphlyitic.....
In a message dated 6/25/00 3:03:02 AM, firstname.lastname@example.org writes:
<< The fossil record says that coelurosaurs and other theropods are really
really similar in a lot of ways that are hard to tie with flight or living
in trees. Even if flight did evolve in the trees, how does your idea that
theropods are polyphyletic follow from that? How come you can have flying
birds evolving from originally ground-dwelling archosaurs that became
arboreal, but not from origianlly ground dwelling theropods that became
LN Jeff >>
Well, there's Longisquama, that little feathered beastie that we've all been
talking about. It seems that you don't think it exists. Or that feathers
evolved more than once, or that they're ferns.....
If Longisquama had real feathers, that that's the assumption here, then
convergance is the only answer. Unlike bats and pterosaurs, the feathered
wings would be a major problem for quadropedal walking. Bipedalism is one
method of solving that problem.
If the theropoda is polyphelitic, than you have a situation like some
Malagasaysay lemurs, that jump or walk on two legs. Then you have the mass
extinction at the end of the Jurassic, which is not an assumption. We know
that it took place.
You have two superficially similar groups competing after a minor holocaust,
with dogma refusing to recognize the real truth.