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Re: why larger?

In a message dated 97-02-20 12:10:47 EST, znc14@ttacs1.ttu.edu (Jonathan R.
Wagner) writes:

<<  It's been a while, but the model of speciation (ie. biological
 model) which I remember involves:
         1) reproductive isolation for an extended period
         2) selection pressure for change in the phenotype >>

What you are describing here are circumstances that, every so often, >lead
to< a "speciation event." You have not described the >event< itself. How, for
example, would one determine that a >new species< has been created that was
not there prior to the event?