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Re: labels are imaginary



In a message dated 96-02-06 17:35:25 EST, pharrinj@PLU.edu (Nicholas J.
Pharris) writes:

>Excuse me, but there is a middle position as well.  I include arctomets 
>in the Aves, which is the sister group to the Archaeopterygiformes, which 
>includes Archaeopterygidae and Dromaeosauridae.  All descendants of the last

>common ancestor of, say, _Gallus_ and _Archaeopteryx_ belong in the taxon 
>Avialae.

Actually, there are about as many different middle positions as there are
speciation nodes in between the common ancestor of Dinosauria and the common
ancestor of all extant birds.