…This group appeared in the late Carboniferous period of the Paleozoic era 300 million years ago, developed into the following Permian period, and declined and became extinct in the Triassic period at the beginning of the Mesozoic era. In particular, it is believed that mammals emerged transitionally from the Cynodontia of the Triassic period. Based on the skeleton, it can be said that the characteristics of mammals were gradually acquired during the 130 million year evolutionary process of mammal-like reptiles. … *Some of the terminology explanations that mention "kinodon" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このグループは,3億年前の古生代石炭紀後期に出現し,次の二畳紀に発展し,中生代初頭の三畳紀には衰退し絶滅したものである。とくにその中で,三畳紀のキノドン類Cynodontiaより哺乳類が移行的に出現したとされる。哺乳類の特徴は,骨格をみる限り,哺乳類型爬虫類の1億3000万年に及ぶ進化の過程で漸進的に獲得されたといえる。… ※「キノドン」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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