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of the goals of modern taxonomy over the past fifty years has been to eliminate paraphyletic taxa from formal classifications. Below is a partial list of obsolete taxa and informal groups that have been found to be paraphyletic.

Paraphyly in species

Species have a special status in systematics as being an observable feature of nature itself and as the basic unit of classification. Some articulations of the phylogenetic species concept require species to be monophyletic,

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