[Taxacom] what counts

Pierre Deleporte pierre.deleporte at univ-rennes1.fr
Wed Sep 17 05:41:34 CDT 2008


Pogue M. G. and Mickevich M. F. 1990.
Character definitions and character state delineation: the Bete Noire of 
phylogenetic inference
Cladistics 6, 319-362.


John Grehan a écrit :
> With regard to the recent discussion about homoplasy etc, I find in
> practice that much of the problem can lie with the original delineation
> of characters. I have mentioned in hominid systematics how so much of it
> is sloppy, being poorly documented if at all (and often without holotype
> access), but here is an illustrative example from primate systematics.
> A recent paper by Bajpai et al (2008) (The oldest Asian record of
> Anthropoidea, PNAS 105, 11093-11098) purports to have discovered the
> oldest anthropoid fossil, but represented by three teeth. So one would
> expect to see a list of one or more apomorphies that corroborate these
> teeth conforming to the anthropoid clade. But there was none that I
> could find. In addition I could not even find reference to primate
> characters let alone anthropoid. Also, I could not find any reference to
> outgroup comparisons for confirming that their ingroup character states
> were unique to the ingroup. Yet they published a phylogenetic analysis
> with a lot of characters in one of the most prestigious journals in the
> US. So am I missing something? Am I just stupid? Any comment?
>
>  
>
> John
>
>  
>
>  
>
> Dr. John R. Grehan
>
> Director of Science
>
> Buffalo Museum of Science1020 Humboldt Parkway
>
> Buffalo, NY 14211-1193
>
> email: jgrehan at sciencebuff.org
>
> Phone: (716) 896-5200 ext 372
>
>  
>
> Panbiogeography
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> http://www.sciencebuff.org/systematics_and_evolution_of_hepialdiae.php
>
> Human evolution and the great apes
>
> http://www.sciencebuff.org/human_origin_and_the_great_apes.php
>
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-- 
Pierre Deleporte
Université de Rennes 1
CNRS UMR 6552 
Station Biologique de Paimpont
F-35380 Paimpont   FRANCE
Téléphone : 02 99 61 81 63
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