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Re: something's wrong here: Qianosuchus phylogeny

On 8/31/07, David Marjanovic <david.marjanovic@gmx.at> wrote:
> > Last rant: specimen-based studies: good. Suprageneric-based studies: bad,
> > as shown above.
> You're right that using supraspecific OTUs greatly increases the risk of
> screwing up. It doesn't guarantee screwing up, however. I'm currently
> working on a paper that (as a side effect) will... probably show this to
> most people's satisfaction.

Specimen-based studies can have other problems, like being affected by
ontogeny, sexual dimorphism, etc. It seems to me that OTUs should
ideally be populations or clades (although the latter, if large
enough, might present problems for character coding).
Mike Keesey