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Re: Therizinosauroid apomorphies
From: "Mickey Mortimer" <firstname.lastname@example.org>
I completely agree. Despite the fragmentary nature of Beipiaosaurus, the
therizinosaurs are obviously monophyletic.
I hope that I don't come across as obtuse or as one holding out beyond the
point of reason, but I don't see it as that obvious. I feel that
_Therizinosaurus_ may belong with _Harpymimus_ based on the morphology of
the humerus and the manual uguals. The semi-lunate in _Alxassaurus_ is
incompletely fused and this may or may not mean something. I would
definitely agree that _Erlikosaurus_, _Enigmosaurus_, _Segnosaurus_, and
_Nanshiungosaurus_ form a clade, though I'm not sure where they would fit.
The D-shaped nareal bar is at least one character to unite them with
ornithomimosaurs and a coracoid tubercle may be a trait to unite
_Alxasaurus_ with that group. Overall, _Beipaiosaurus_ and _Alxasaurus_
seem maniraptoran, though.
I don't want to beat this into the ground as its been discussed off and on
for some while. If there's still interest, I'm happy to continue
discussion, though. Thanks to Tim, Mickey M., and Nick L. for the very
helpful insights for me to consider.
Have a good night.
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