Exist sub-species?????

[Les Kaufman]

Gurcharan is right in that speciation may not always be instantaneous, but
it should be remembered that adaptive differentiation assumes a multitude
of manifestations, and may only rarely be associated with the arisal of a
new taxon with an evolutionary future beyond that of the original
population.  In other words, most subspecies, semispecies, varieties, or
whatever you wish are terminal clades, well suited to their odd little
station in life but going nowhere in particular via their progeny.

Les Kaufman
Boston University Marine Program
lesk at bio.bu.edu
617-353-5560 office
617-353-6965 lab
617-353-6340 fax