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Re: Defending grades (Was: Re: Archaeopteryx (rant))
In a message dated 6/21/03 8:51:31 AM Pacific Daylight Time, email@example.com
<< About chronospecies I certainly agree that all boundaries are artificial.
They need not be. All we need to do is recognize the appearance of an
evolutionary novelty (a change in a character's state, or the appearance of a
character, for example). When one appears, it is valid to assert that a species
has changed into another.