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RE: Gigantoraptor stuff
Tom Holtz wrote:
Not very. Nor much like Therizinosaurus, either. In fact, its arm and hand
are more similar to basal eumaniraptorans than to other oviraptorosaurs, in
terms of propotions.
This thing is HUGE: Albertosaurus-sized. If it ate "small vertebrates",
those small vertebrates could include protoceratopsids...
_Gigantoraptor_ reminds me of a giant moa (dinornithid). The resemblance is
probably largely superficial, and I'm really going out on a limb here (so to
speak)... but I can't help wonder if maybe those big clawed hands were used
not for attack but for defense. Those raking hands would prompt a roving
tyrannosaur to think twice about coming too close. Also, winged arms and
hands might have made the animal (or at least the forelimb) appear even
bigger and scarier than what it was. Just idle speculation.
It's "birdiness" are mostly convergences, as with oviraptorids (and
caenagnathoids in general), as more basal oviraptorosaurs lack these
Yes; just like alvarezsaurs. Dromaeosaurs appear to have went the opposite
way, with the more basal ones (such as microraptorans) the most bird-like,
whereas _Achillobator_ and other big'uns lost many of the basal
eumaniraptoran traits that we have come to regard as "bird-like".
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