Re: Archaeopteryx, Sinornithosaurus, Rahonavis, Unenlagia...]

[Stanley Friesen <sarima@ix.netcom.com>]

At 09:46 AM 9/28/99 -0400, Josh Smith wrote:
>
>    Well, actually, it IS a big problem in this case because we have
>been supposing that _Archaeopteryx_ is the ancestral taxon to this
>animals with the pygostyles. 

Few experts actually assert this.  Most say only that it is anatomically
close to the ancestral bird, which a subtly different thing.  In this
latter case being co-eval with more derived forms is not a problem at all.

--------------
May the peace of God be with you.         sarima@ix.netcom.com