[Taxacom] Paraphyly

David Campbell pleuronaia at gmail.com
Fri Oct 3 10:48:03 CDT 2014


Another report of morphologically aberrant hominids, possibly of
paraphyletic origin, can be found at
http://www.improbable.com/airchives/paperair/volume1/v1i1/barney.htm

However, no formal taxonomic name was assigned.

On Fri, Oct 3, 2014 at 2:33 AM, Stephen Thorpe <stephen_thorpe at yahoo.co.nz>
wrote:

> Ha, I'm up for anything matey! :)
>
> I prefer to discuss the general issue, which seems to be this: what if
> some human cells mutated into something like an independent new organism
> (which was totally unlike Homo sapiens in morphology and behaviour, and
> reproductively isolated from H. sapiens)? Most of the debate on Helacyton
> gartleri is really a side issue about whether it is an independent new
> organism or not. But theoretically, we can imagine a case when that is
> uncontroversially true - it really is an independent new organism. I don't
> think paraphyly comes into it, because we don't really know how exactly
> speciation normally occurs, and it might be like this. So, yes, in this
> imaginary case, we would have a new species of Homo (I would say sister
> species to H. sapiens), which was morphologically highly aberrant. So, no
> real theoretical problems with this. To my mind paraphyly only applies to
> phylogenetic trees with species as terminal nodes, so there is no such
> thing as a "paraphyletic
>  species", but I know others disagree!
>
> Stephen
>
> --------------------------------------------
> On Fri, 3/10/14, Rob Smissen <SmissenR at landcareresearch.co.nz> wrote:
>
>  Subject: [Taxacom] Paraphyly
>  To: "taxacom at mailman.nhm.ku.edu" <taxacom at mailman.nhm.ku.edu>
>  Received: Friday, 3 October, 2014, 7:17 PM
>
>  While we are on paraphyly, anyone up
>  for a few rounds on Helacyton gartleri?
>
>  Sent from Samsung Mobile
>
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-- 
Dr. David Campbell
Assistant Professor, Geology
Department of Natural Sciences
Box 7270
Gardner-Webb University
Boiling Springs NC 28017



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