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[Arthropod] New crustacean gene set: Porcelain crab transcriptome paper

Don Gilbert via arthropod%40net.bio.net (by gilbertd from cricket.bio.indiana.edu)
Fri Feb 19 16:24:36 EST 2010


This Porcelain crab transcriptome is compared to only Daphnia and two insects
(in the figure I looked at), so it is much narrower in species scope than that
recent Arthropod phylogeny paper. On the other hand it is comparing 19,000 EST
clusters (~genes), whereas the Nature paper compared only ~60 genes.  My take, 
and I'm not a phylogenist, is these are both accurate interpretations of their 
data, but neither is a complete or final determination of the phylogenies.
We need more data for that :)

I just took another look at the phylo tree in Regier et al Nature paper and 
it seems in agreement with malacostracan (crab) being more distant from 
insects than branchiopoda (daphnia).

-- Don

|From dobbard from staffmail.ed.ac.uk  Fri Feb 19 16:01:30 2010
|Date: Fri, 19 Feb 2010 21:01:14 +0000
|From: Darren Obbard <dobbard from staffmail.ed.ac.uk>
|To: Don Gilbert <gilbertd from bio.indiana.edu>
|Subject: Re: [Arthropod] New crustacean gene set: Porcelain crab
|	transcriptome paper
|> Among other results here, they support the pancrustacea hypothesis and
|> suggest that branchiopod crustaceans (daphnia) may be more closely related
|> to insects than other malacostracan crustaceans (por. crab).
|Does this mean we don't believe "Xenocarida as the long-sought sister  
|group to the Hexapoda"?  
|Darren Obbard
|Institute of Evolutionary Biology
|Ashworth Labs
|Kings Buildings
|University of Edinburgh, UK

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