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Re: What, if anything, is _Apatosaurus_ (Was: Ceratops (was RE: Pterosaur diversity (was: Re: Waimanu)))

Quoting Mike Taylor <mike@miketaylor.org.uk>:

> Using Wilson and Upchurch's criteria, very few sauropod genera
> would be valid.

Really?  What are the criteria that you allude to exactly?  That each
valid genus should be diagnosed by at least one autapomorphy?  I would
think that most sauropod genera have that.

No, that each valid genus should still be diagnosable by the characters originally used to diagnose it.

Nick Pharris
Department of Linguistics
University of Michigan

"Creativity is the sudden cessation of stupidity."
    --Edwin H. Land