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Re: Pygostyle



  *Archeopteryx* and *Rahonavis* do have stiffened
tails formed by elongate centra and chevrons, more so
in *Rahonavis* and dromies than in Archie, while the
only specimen of *Unenlagia* lacks caudal material
(same if *Megaraptor* is referrable to Unen).


_Megaraptor_ the same as _Unenlagia_? _Megaraptor_'s big megalosaur-like arms would look quite funny hanging from the shoulders of a dino-bird. Do you mean _Unquillosaurus_?

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