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HP Tim Williams icluded this in a post
yesterday:
"Note added in proof: Norell et al. (2002) describe a new specimen of
a
basal dromaeosaur (possibly a _Sinornithosaurus_) from the 124 Ma old Yixian formation of China that has preserved impressions of modern pennaceous feathers including a rachis, barbs, and a planar vane. Occasional separation of barbs in the feather vanes document presence of differentiated barbules as in _Archaeopteryx_ and modern birds. Feathers on the tip of the tail are >19 cm long, and the beautifully preserved feathers on the upper hindlimbs are 13.5 cm long. This latest discovery conclusively demonstrates the theropod origin of feathers and birds." Does anybody know if any photos of this specimen
are available anywhere? (or any more details?)
Regards
Michael Lovejoy
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