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Compairing the tails of Archaeopteryx and Dromaeosaurids



Hello!
 
Dromaeosaurids have tails whose shafts are stiffended by bony rods. The bases of these tails are very mobile, though. The tail of Archaeopteryx seems to have a rather flexible base too, while the shaft isn't particularily supple. I would like to know if some kinf of bony rods are known to exist in the tail of Archaeopteryx too.
 
Thanks in advance,
Henri Rönkkö