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Re: Errata: A new "Revolution" installment.

Breathtaking!  Luis, you've done it again!

Now the question.  _Microraptor gui_ hails from the Jiufotang Formation,
which overlies the Yixian, and postdates it by perhaps 10 to 15 million
years.  Ditto for its apparent synonym, "_Cryptovolans pauli_."  So the
question is: does _Microraptor gui_ belong in a Yixian ecosystem?

Could the four-winged sinornithosaurs in the background instead be young
_Sinornithosaurus millennii_ individuals?  Gregory S. Paul's article in
_Prehistoric Times_ suggests the possibility that the four sinornithosaurs
(_S. millennii_, _M. zhouianus_, _C. pauli_, and _M. gui_) should be
considered congeneric.

I'm trying to find a way to keep those beautiful four-winged dromaeosaurs in
the picture.  I don't want you to have to paint them out!

The other option would be to propose that _Microraptor gui_ originated much
earlier than the published fossils indicate.  _Psittacosaurus_ and
_Sinornithosaurus_ are examples of dinosaur genera found in both formations.
Do you know something we don't?  (It wouldn't surprise me).

See _Nature_, Feb. 20, 2003, pp.807-814, "An exceptionally preserved Lower
Cretaceous ecosystem," by Zhonghe et al..

"Dino Guy" Ralph W. Miller III
Docent at the California Academy of Sciences
proud member of the Society of Vertebrate Paleontology

Or does four-winged flight facilitate time travel?  ;^)