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Re: Broader than Dinosauria [Additional Info]
Ken Kinman (firstname.lastname@example.org) wrote:
<By the way, I believe it was one of Jaime's posts that mentions the lack of a
segnosaurs. If they are the only theropods to lack the twist-thumb, it would
be interesting to
know why they were the only theropods to have lost it.>
I overstated myself, slightly. Therizinosaurs do in fact have a slight twist,
but this is
mediocre, and resembles *Ingenia* and caenagnathids more than anything, even
though the twist is
not apparent. Ornithomimosaurs do lack the twist primitively, but this seems
related to feeding
styles. It does nothing to phylogeny, but neither would therizinosaur loss.
Jaime A. Headden
Where the Wind Comes Sweeping Down the Pampas!!!!
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