paraphyly

Curtis Clark jcclark at CSUPOMONA.EDU
Thu Jun 12 13:02:44 CDT 1997


At 02:46 PM 6/12/97 -0500, Thomas G. Lammers wrote:
>Exactly!  "Budding off" of peripheral isolates is extremely common mode of
>allopatric speciation.  When it happens, a formerly monophyletic species
>becomes paraphyletic.

Yes, but few would argue that the monocots arose as a peripheral isolate of
the basal angiosperm species, or that the birds were a peripheral isolate
of the first dinosaur.


------------------------------------------------------------------------
Curtis Clark                       http://www.is.csupomona.edu/~jcclark/
Biological Sciences Department                     Voice: (909) 869-4062
California State Polytechnic University, Pomona    FAX:   (909) 869-4396
Pomona CA 91768-4032  USA                          jcclark at csupomona.edu




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