Evolutionary novelties shared by an ancestor and its descendants but not seen in groups that are not direct descendants of that ancestor are known as ___________.

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Shared derived traits, also known as synapomorphies, are unique features that are inherited from a common ancestor and are shared by all descendants of that ancestor. These traits are used to identify and classify groups of organisms within the context of evolutionary relationships.

Evolutionary Novelties Shared by an Ancestor and Its Descendants but Not