A taxon composed of members that do not share a single recent common ancestor is said to be

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A taxon that does not share a single recent common ancestor is considered polyphyletic. This means that the group includes species that have different evolutionary origins and do not share a common ancestor. This is different from a monophyletic taxon, which includes all the descendants of a single common ancestor, and a paraphyletic taxon, which includes some, but not all, descendants of a single common ancestor.

A Taxon Composed of Members That Do Not Share a Single