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Re: warm-bloodedness



On Thu, 22 Jun 2000, philidor11 wrote:

> <With cladistics, _Archaeopteryx_ is a member of the Aves - as well as a
> member of the Saurischia, AND a member of the Dinosauria.  There is no
> reason for these categories to be mutually exclusive.>
> 
> Is Archie an Aves?

The prevalent phylogenetic definition of Aves is "the most recent common
ancestor of _Archaeopteryx_ and extant birds, plus all of its
descendants". So, by definition, _Archaeopteryx_ belongs to Aves.

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