Paraphyly facts for kids

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Paraphyly is a term in cladistics. It means a group which does not include all its descendents. So Sauropsida without birds is paraphyletic, since birds are definitely descended from archosaurs, probably small theropod dinosaurs (origin of birds).

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Paraphyly is corrected to monophyly when the missing group(s) are included. So if birds are included in Sauropsida, the larger group is then monophyletic. Traditional classification is often paraphyletic.

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