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RE: Polyphyletic

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Posted by: apeltes at Wed Oct 1 08:40:51 2008  [ Report Abuse ] [ Email Message ] [ Show All Posts by apeltes ]  
   

I think I get it. A paraphyletic group is defined by shared ancestral characters (not convergent similarities), and the lack of certain apomorphies found in the excluded sub-taxa.

For example: reptiles are defined by an amniotic egg and scales not modified as hair or feathers.

   

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