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Re: Dietary factors & giant land mammals - birds
On Tue, 8 May 2001 MarkEShelly@aol.com wrote:
> I wish we had a word to seperate the bulk of dinosaurs from the
> feathered, toothless, tailess, handclaw-less dinosaurs, similar to
> what the semi-scientific term dinosaur used to mean!
Which of the traits?
non-feathered: non-maniraptoran _Dinosauria_ (so far as we know)
pygostyle-less*: non-pygostylian _Dinosauria_
handclaw-less: non-ornithuran _Dinosauria_
(*I assume this is what you mean by "tailess".)
> I do not understand why redefining dinosauria means the word dinosaur
> must also be redefined.
Can you imagine the confusion otherwise?
> If man evolved from bacteria, I would not like to hear the
> statement (men are bacteria -or fish for that matter)
We are not bacteria or fish -- we are _Biota_ and _Craniata_.
> Mammal was origionally defined to include bats. As bats and
> flightless mammals both exist today, it is a great combination. The
> term dinosaur has the element of extinction to it, meant to classify
> an extinct group with a common trait.
What common trait is that? I'd like to hear one.
In discussing extinction, the terms non-neornithean _Dinosauria_ and
Mesozoic _Dinosauria_ are handy.
T. MICHAEL KEESEY
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