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Re: Ah ha! That's where therizinosaurs came from
In a message dated 8/15/11 8:21:29 AM, GSP1954@aol.com writes:
<< Ratites have a fullt developed suite of derived avian characters,
a skull with a severely reduced maxilla, paleognathus palate, advanced
braincase, strut like jugal and so on. Unless a fantastic level of
occurred it is abjectly impossible for them to not have descended from
closely related to tinamous.
In a message dated 8/14/11 10:01:56 PM, email@example.com writes:
<< What about ratites? How do we know they had flying ancestors?
My point is that ratites do not retain any single anatomical feature that
is found only in flying birds. I realized last week that, if we look at
the anatomy only, ratites could retain the anatomy of an avialan lineage
that diverged right before flight was attained. I was surprised when I
realized that. >>