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Re: Hoatzin & Archaeopteryx
I'm not sure what you mean here. If "bird" is defined to include
dromaeosaurs and oviraptorosaurs, _Archaeopteryx_ is still the oldest
undisputed bird. I don't know of any others.
There are Kimmeridgian and perhaps Middle Jurassic dromaeosaurs (and
As for _Epidendrosaurus_, you're assuming a Middle
Jurassic age for this critter; I think this will change.
Right. I don't know what the age is based upon...