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Re: Feathered Dragons: Studies on the Transition from Dinosaurs to Birds
David Marjanovic (email@example.com) wrote:
<I'd only put Scansoriopterygidae in the trees. (Their feet are pretty
unequivocal, and their hands are hard to explain differently.)>
I beg to differ. *Epidendrosaurus* is preserved with the first toe of
one leg in the same direction as the others, and no metatarsal to show
"proper" articulation. *Scansoriopteryx* is preserved with one foot having
the metatarsal preserved, and the toe is in opposition to the others. This
is, barring theories on twisting and how a distally positioned digit MUST
be evidence of an anisodactyl arrangement (unproven), fairly equivocal.
Aside from this, absence of a reverted hallux in other theropods does not
preclude their being able to climb or be in a tree ... it only prohibits
"effective" perching and grasping on branches two-leggedly. This doesn't
mean no other bird or other maniraptoran theropod (or even any small
coelurosaur) could climb or get into a tree for at least PART of it's
habitus. If it does, I'd like to see unequivocal proof otherwise.
Jaime A. Headden
Little steps are often the hardest to take. We are too used to making leaps
in the face of adversity, that a simple skip is so hard to do. We should all
learn to walk soft, walk small, see the world around us rather than zoom by it.
"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
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