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Re: Earliest Neornithean?
On Tue, 9 Nov 1999, Timothy Williams wrote:
> T. Mike Keesey wrote:
> >Does anyone know which time period the earliest known neornithean hails
> I have _Ambiortus dementjevi_ listed as Barremian-Aptian
> (Khurilt-Ulan-Bulak, Bajan-Khongor aimek, Mongolia; Unduruhinskaya
> Formation). Not sure if it qualifies as a true neornithine or even an
> ornithurine - then again, I don't think anyone's sure.
> _Gansus yumenensis_ is Early Cretaceous too, but I'm not sure of the exact
> age - nor, again, if it's a true neornithine.
I have _Ambiortus_ as an ambiortimorph (Ambiortimorphae being the
proximate outgroup to Neornithes -- include Ichthyornithiformes) and
_Gansus_ as a non-ornithuran euornithean (placement questionable).
--T. Michael Keesey
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