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Re: Steadman's review of Mesozoic Birds
In a message dated 1/29/04 8:16:02 PM Eastern Standard Time,
<< Even ignoring that- First, some BAD proponents regarded
alvarezsaurids as non-avian from the beginning (eg. Ostrom, Sereno). Second,
I bet most of those BAD authors Steadman cited always believed
alvarezsaurids were reptiles (PT definitions again). Finally, though Zhou,
Martin, Sereno and such may have "determined" alvarezsaurids to be non-avian
prior to 2002, none had shown compelling reason this was a better hypothesis
(though Sereno 2001 made a good start). >>
It should be noted that, in both cases, the authors are extremely cautious.
Chiappe notes how few steps it would take to reunite them with Pygostylia.
Novas & Pol note that they end up in the same position with a resolution from
PeeWee. It's not a full 180 as he seems to paint it.