Κλάδος: Διαφορά μεταξύ των αναθεωρήσεων

{{Confusing|date=June 2009}}

{{otheruses}}

{{wiktionary}}

A '''clade''' (from [[ancient Greek]] ''{{Polytonic|κλάδος}}'', ''klados'', "branch") is a technical term coined by [[Germany|German]] biologist [[Willi Hennig]] and used in biological [[systematics]] to signify a single "branch" on the "[[Tree of life (science)|Tree of life]]", a group composed of a single ancestor and all its descendants.<ref>Henning, W. (1959): Grundzüge einer Theorie der phylogenetischen Systematik. ''Deutscher Zentralverlag'', [[Berlin]].</ref> The idea that such a "natural group" of organisms should be grouped together and given a [[Taxonomy|taxonomic]] name is central to [[biological classification]]. In [[cladistics]] (that takes it's name from the term), clades are the only acceptable units