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(2) Speciation: the reproductive isolation of daughter populations from the parent populations or other daughter populations.
This grows more unsatisfactory the more I look at it. A deceased lifeform is reproductively isolated, so any time something dies we can call it a different species. Best we know, all formerly living things are unable to reproduce.

Menopause can be claimed, as well as sterility of any cause, as a "speciation event". Could make for some cheap & easy "discoveries". Newsflash: Your Grandmother's a New Species: Homo Geriatriaticus!" But this kind of thing isn't very helpful in the quest for knowledge.


Dark Matter + Dark Energy = Dark Truth

"We find that such evidence demonstrates that the ID argument is dependent upon setting a scientifically unreasonable burden of proof for the theory of evolution." - Judge Jones Kitzmiller case
http://www.talkreason.org/articles/Falsify.cfm

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"And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are the gift of God? That they are not to be violated but with his wrath?" - Thomas Jefferson