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Re: Geographic Distribution of Maniraptora
Now whether this is important, or just because of the remarkable site from
which they came, I do not know.
It is fairly obviously due to the fact that the most productive sites are
exposures of either the Baruungoyot, Djadokhta or Nemegt Formations in
Mongolia or the Yixian or Jiufotang Formations in China, all of which are
If im not wrong, _Pedopenna*_ *is also from the Jurassic...
*Pedopenna*, *Epidendrosaurus* and apparently *Scansoriopteryx*, as well as
the mammal-or-near-mammal-depending-on-the-definition *Castorocauda* and the
mammal *Volaticotherium*, are from the Daohugou Beds, which are not Middle
Jurassic (as stated in most of the literature), but Late Jurassic or (more
probably) Early Cretaceous in age. They could be almost as young as the
Yixian Formation (which contains the very end of the Barremian and a small
part of the Aptian).
This subject has been treated on this list several times; just search the