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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rosa's Rule ： ウィキペディア英語版 Rosa's Rule Rosa's Rule, also known as Rosa's law of progressive reduction of variability,〔(Phylogenetic Systematics ), by Willi Hennig (translated from German by D. Dwight Davis and Rainer Zangerl); originally published in German in 1966; published in 1979 by University of Illinois Press (via Google Books)〕 is the tendency to go from character variation in more primitive representatives of a taxonomic group or clade to a fixed character state in more advanced members. An example of Rosa's rule is that the number of thoracic segments in adults (or holaspids) may vary in Cambrian trilobite species, while from the Ordovician the number of thorax segments is constant in entire genera, families, and even suborders. It is named for Italian paleontologist Daniele Rosa.〔(Life's Splendid Drama: Evolutionary Biology and the Reconstruction of Life's Ancestry, 1860-1940 ), by Peter J. Bowler; published 1995 by University of Chicago Press (via Google Books)〕 == References == 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「Rosa's Rule」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.