[Taxacom] minimal estimates

[John Grehan]

The following was intended for the list to which I am replying.

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From: David Campbell [mailto:pleuronaia at gmail.com] 

> Yes; likewise tectonic correlations or any other calibration needs to
> be well-researched and documented.  Unfortunately, the number of
> molecular clock papers that do not adequately investigate the
> geological and paleontological data is large.  Error bars also need to
> incorporate all the sources of error.

I am in general agreement. There is often more than one tectonic model
and dates for a given situation and the common practice of choosing only
one among alternatives is to misrepresent the state of geological
research.

John Grehan