Re: BAD vs. BADD (was: Re: Most popular/common dinosaur misconceptions)

[Phillip Bigelow <bigelowp@juno.com>]

On Wed, 23 Aug 2006 13:32:37 -0700 (PDT) Jura <pristichampsus@yahoo.com>
writes:

> I'd take an all, or nothing approach to the
> hypothetical cutoff too. That is, a dinosaur would
> have to have all the above to be called avian. An
> avian would probably have to lose all of the above to
> be called something else, but that gets a little too
> forward thinking and dangerous.


Character reversals (for instance, secondary flightlessness in some
dinosaurs) are an example of why hypothetical morphologic cutoff points
in classifications can get dangerous.

<pb>
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