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October 25, 2012
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A new Jehol find? Nope! It's Ornithomimus itself! Two new specimens (an adult and a juvenile) have been found with feather traces, and a long-known adult specimen has been discovered to have what may be attachment points for large feathers on the arms. This means that pennibrachiae go down to the base of maniraptoriforms! The juvenile, however, doesn't preserve pennibrachiae, so it might mean that in these basal maniraptoriforms only the adults had pennibrachiae, and that pennibrachiae originally evolved for display. In addition, this also opens up the possibility of finding feathered dinosaur specimens in coarser-grained sediment than usually expected, as long as fossil hunters keep a sharp eye out for those delicate feather traces.
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:iconlordofstamps:
LordOfstamps Featured By Owner Sep 28, 2014
Christian Foth pointed out that the pennacious feathers might actually be monofilimentious (hope I spelled that right) because those would probably preserve similar traces.
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:iconalbertonykus:
Albertonykus Featured By Owner Sep 28, 2014
That's absolutely right (and others pointed it out online prior to the publication of Foth et al.'s paper). You might notice that I didn't use the term "pennaceous" in my description of the find.
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:iconlordofstamps:
LordOfstamps Featured By Owner Sep 28, 2014
Oh I see.
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:iconjd-man:
JD-man Featured By Owner Oct 29, 2012
I was originally expecting Pelecanimimus, but this is even better, both b/c of the conditions it was preserved in & b/c of the evidence for wing feathers. What I'm wondering is if ornithomimosaurs brooded their nests like true maniraptors?
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:iconalbertonykus:
Albertonykus Featured By Owner Oct 29, 2012
That's certainly a possibility!
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:iconjd-man:
JD-man Featured By Owner Oct 29, 2012
Someone should draw a brooding ornithomimosaur (preferably someone w/talent). I nominate you.
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:iconalbertonykus:
Albertonykus Featured By Owner Oct 29, 2012
Aw, I'm honored. I'll see if I can get around to that, but don't be surprised if someone beats me to it. :D
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:iconspongebobfossilpants:
At this rate, the 80s meme of feathered Coelophysis rhodesiensis will prove correct!
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:iconalbertonykus:
Albertonykus Featured By Owner Oct 27, 2012
:D
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:iconrichardelder:
RichardElder Featured By Owner Oct 26, 2012  Hobbyist
This was found in Alberta and has been at the Royal Tyrrell Museum for a long time. I've known about this since August 2010!
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