[Taxacom] North America, Central America + S.E. Asia sister taxa
Kipling (Kip) Will
kipwill at berkeley.edu
Tue Dec 20 10:55:31 CST 2011
Peculiar in the sense that it is atypical for ground beetle
distributions, thus my search to see if it found in other group.
However, I would not describe it as "South East Asia and the New World",
since the New World is a much, much bigger area than the area where the
beetles are found, nor does "trans-Pacific" clearly capture the pattern.
The latter strikes me as vague since Australia-New Zealand-Chile and
Korea-California are both "trans-Pacific", but surely due to different
historical events, and these different from North America, Central
To be more specific the New World clade is only found east of the
Rockies would be more likely have a Laurasian connection to the
Thailand-Vietnam clade, I think. We have plenty of Laurasian or
Beringial connections in ground beetles, but typically these have some
elements also in the Paleartic, which is lacking in my beetles. Perhaps
they had a much wider distribution once and extinction has eliminated
the middle. However, such a scenario feels a bit too Darlingtonian for
my me at this point.
On 12/20/2011 7:03 AM, John Grehan wrote:
> Thank you for the clarification. I guess I am puzzled about your
> referring to it as a 'peculiar' distribution, at least with respect to a
> taxon existing in South East Asia and the New World since these types
> are patterns are commonplace and are spatially diagnostic as being
> Admittedly, many such groups may lack a rigorous phylogenetic analysis,
> but on the other hand I suspect many do.
> John Grehan
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