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Re: Palms in
It is also suspected now that T. Rex also cared for it`s young in such a
way. How then did it "bring home the bacon"?....Either many trips, or it
used it`s mouth,....(perhaps regurgitated food).<<<
Presumably an animal that reduced its forelimbs while evolving a five foot
long head could manage to bring food to its progeny. I'm unaware. though,
of the evidence that suggests any tyrannosaur fed its young. I was under
the impression that the large teeth of juvenile T. rex (=Nannotyrannus) were
suggestive of having to fend for themselves at a early age.
I still think a better explaination for such restricted movement in
theropods in general is a cause of their being secondarily flightless.
Once specialized for flight, such bone structure would be hard to
unmodify for other uses.<<<
But basal tetanurans don't have well developed semilunates. And more basal
theropods probably could pronate their limbs. Are you suggesting that birds
evolved after "ceratosaurs" but prior to tetanurans, or are you suggesting
that birds evolved flight without a well developed semilunate, and then they
and tetanurans evolved them in parallel?
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