No subject

[B.J.Tindall]

I was looking for a definition of "crown taxa" since I was not sure whether
I understood the term correctly and couldn't find anything conclusive. My
initial impression was that "crown taxa" were those organisms living today,
but I have seen the term used in such a way that it would mean that crown
taxa are vertebrates and higher plants etc., whereas protists would not be
considered to be crown taxa. Could anyone provide more information?
Brian


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