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Priority is a fundamental principle of modern botanical nomenclature and zoological nomenclature. Essentially, it is the principle of recognising the first valid application of a name to a plant or animal. There are two aspects to this: # The first formal scientific name given to a plant or animal taxon shall be the name that is to be used, called the valid name in zoology and correct name in botany. # Once a name has been used, no subsequent publication of that name for another taxon shall be valid (zoology) or validly published (botany). There are formal provisions for making exceptions to this principle. If an archaic or obscure prior name is discovered for an established taxon, the current name can be declared a ''nomen conservandum'' (botany) or ''conserved name'' (zoology), and so conserved against the prior name. Similarly, if the current name for a taxon is found to have an archaic or obscure prior homonym, the current name can be declared a ''nomen protectum'' (zoology) or the older name suppressed (''nomen rejiciendum'', botany). ==History== The principle of priority has not always been in place. When Carl Linnaeus laid the foundations of modern nomenclature, he offered no recognition of prior names. The botanists who followed him were just as willing to overturn Linnaeus's names. The first sign of recognition of priority came in 1813, when A. P. de Candolle laid out some principles of good nomenclatural practice. He favoured retaining prior names, but left wide scope for overturning poor prior names.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Principle of Priority」の詳細全文を読む スポンサード リンク
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