[Taxacom] GOMGOACAT - Pteridophyta

Hovenkamp, P. (Peter) Hovenkamp at nhn.leidenuniv.nl
Mon Jul 27 07:22:07 CDT 2009

I would have thought that word would have got out by now that
Pteridophyta are likely to be monophyletic indeed. But if Kinman's
system does not deal with monophyletic groups, Ken is free to make them
poly- or paraphyletic. 

But why is it that every now and then (is it indeed with increasing
frequency or is my memory failing me?) we need to be smothered on
Taxacom with this sort of discussion? It does not seem to result in
anything useful - certainly not in better informed opinions being

If you would all label these postings properly, I can set up an
autodelete option. 

Peter Hovenkamp
Nationaal Herbarium Nederland, Leiden branch

(Grumpy Old Men Going On About Cladistics All the Time)  

> -----Original Message-----
> From: taxacom-bounces at mailman.nhm.ku.edu 
> [mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of 
> Kenneth Kinman
> Sent: Saturday, July 25, 2009 12:32 PM
> To: taxacom at mailman.nhm.ku.edu
> Subject: [Taxacom] Pteridophyta
> Hi Jim,
>       I am not sure what you are saying.  Are you saying that 
> Pteridophyta is polyphyletic, rather than paraphyletic?  If 
> so, can you quote some papers which present evidence of its polyphyly?
>          ------Thanks,
>                          Ken
> -------------------------------------------------------
> Jim Croft wrote:
> When someone utters the name 'Pteridophyta', most people have 
> an idea what they are talking about, so in that respect it is 
> not meaningless. 
>  But to use the same handle as a statement of origins, 
> relatedness and connectedness it is not only uninformative, 
> it is misleading.
> Communication is all about context. 
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