[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: node fossil



On Thu, Oct 15, 2009 at 1:18 AM, Jocelyn Falconnet
<j.falconnet@gmail.com> wrote:
> T. Michael Keesey a Ãcrit :
>>
>> But *all* taxa are nodes. (And note that nodes can be terminal.)
>
> Actually, all taxa are not nodes, but all nodes are taxa. Pretty different.
> Paraphyletic and polyphyletic taxa are indeed... taxa, but do not correspond
> to nodes by definition. See the paper on *Darwinopterus*: the taxon
> Ramphorhynchoidea is indicated in the cladistic analysis and mentioned
> several times in the text, but this taxon is still paraphyletic.

Whoops! You are absolutely right. I should have said "species" or
"populations" instead of "taxa".

-- 
T. Michael Keesey
Technical Consultant and Developer, Internet Technologies
Glendale, California
http://tmkeesey.net/