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polyphyletism

polyphyletism (adj. polyphyletic) The occurrence in taxa of members that have descended via different ancestral lineages. True polyphyletism has traditionally been distinguished from errors of classification, especially at the higher taxonomic levels, where organisms, as a result of convergent or parallel evolution, have been placed wrongly in the same natural group; but modern phyletic taxonomists would hold that any taxon found to be polyphyletic is unnatural, and so an ‘error’, and must be disbanded.

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"polyphyletism." A Dictionary of Earth Sciences. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"polyphyletism." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/polyphyletism

"polyphyletism." A Dictionary of Earth Sciences. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/polyphyletism

polyphyletism

polyphyletism The occurrence in taxa of members that have descended via different ancestral lineages. True polyphyletism has traditionally been distinguished from errors of classification, especially at the higher taxonomic levels, where organisms, as a result of convergent or parallel evolution, have been placed wrongly in the same natural group; but some modern phyletic taxonomists would hold that any taxon found to be polyphyletic is unnatural, and so an ‘error’, which must be disbanded.

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"polyphyletism." A Dictionary of Plant Sciences. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"polyphyletism." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/polyphyletism-0

"polyphyletism." A Dictionary of Plant Sciences. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/polyphyletism-0