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Re: Troodon and other problems (was Andrew McDonald response re: European iguanodonts)
A problem with using the type of D. carnegie as a neotype for Diplodocus is
that it is from much higher in the Morrison than the type of D. longus, and
the latter may be a very different kind of beast -- what we think of as
Diplodocus may not be present in the lower Morrison.
Dropping poorly defined Apatosaurus in favor of Brontosaurus which is
founded on the pretty complete Yale skeleton has long been a good idea.