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Re: Dinosaur Genera List corrections #154

On Mon, 1 Jan 2001, Tim Williams wrote:

> _Archaeoraptor_ may no longer be a _nomen nudum_, but is it necessarily a
> valid genus?  What diagnostic characters does Storrs Olson provide for the
> caudal series IVPP V 12330 of _Archaeoraptor liaoningensis_?  If the caudal
> vertebrae show no diagnostic characters below the level of Dromaeosauridae
> or Maniraptora, then _Archaeoraptor liaoningensis_ may be dismissed as a
> _nomen vanum_.

I remember asking this list a while ago what the difference between _nomen
dubium_ and _nomen vanum_ was. The upshot seemed to be that _nomen vanum_
didn't really mean much, and _nomen dubium_ should be used instead. Is
this right?

At any rate, it seems that if _A. liaoningensis_ and _M. zhaoianus_ are
based on the same *individual*, what goes for one goes for the other.
Unless I'm mistaken, if Olson's designation is to be invalidated it must
be in some other fashion.

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