[Taxacom] Salvadoraceae paraphyetlic? (was: North America...)

[Michael Heads]

Hi Ken, 
Trans-tropical Pacific groups in New Guinea and tropical America (matching Bataceae) are quite common. Examples include the plant groups Polygalaceae tribe Moutabeeae and a clade in Monimaceae (both from molecular studies), and the spider Masteria (from Platnick's website). The disjunction may involve central Pacific terranes (some including wood fossils) that accreted westward to New Guinea etc., eastward to the Caribbean, Colombia etc. 
Michael Heads


Wellington, New Zealand.


My papers on biogeography: http://tiny.cc/HeadsPubs
My new book 'Molecular Panbiogeography of the Tropics': http://tiny.cc/MolPanbio



________________________________
 From: Kenneth Kinman <kennethkinman at webtv.net>
To: taxacom at mailman.nhm.ku.edu 
Sent: Saturday, 7 January 2012 7:46 AM
Subject: Re: [Taxacom] Salvadoraceae paraphyetlic? (was: North America...)
 
John,
       So, what is your preferred hypothesis for how Bataceae came to
have its disjunct distribution?  [and perhaps you could name some of the
taxa with a similar distribution which you believe came to have this
distribution in the same way].              
           -------------Ken                  
---------------------------------------------------------
John Grehan wrote:  
     This dispersal stories are not disconcerting at all. They are
empirically meaningless. If there is direct evidence of such travels
then ok, but to just make it up has no scientific merit as far as I am
concerned. When instead one sees extensive vicariism and comparable
ranges in both supposedly good and poor dispersers, along with
correlated tectonics, the imagined dispersal just becomes irrelevant to
understanding the spatial differentiation. 
John Grehan





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