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An autapomorphy in cladistics is a derived trait that is unique to a given terminal group. That is, it is found only in one member of a clade, but not found in any others or outgroup taxa, not even those most closely related to the group (which may be a species, family or in general any clade.
Additional recommended knowledge
An autapomorphy is not present in the closest relative of the terminal group and also was not present in their common ancestor.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Autapomorphy". A list of authors is available in Wikipedia.|