…Therefore, it is the fate of arthropods to have to molt periodically, and failure to molt or the defenseless state before and after molting accounts for a significant proportion of their deaths. Insects have further evolved this exoskeleton by heterosegmentation. The segmented structure of arthropods starts from the synsegmentation that is more clearly seen in their predecessors, the annelids (e.g., lugworms, earthworms, etc.). … *Some of the terminology explanations that refer to "heteronorthogonization" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…そのため周期的に脱皮せねばならないのが節足動物の宿命であり,脱皮の失敗および脱皮前後の無防備状態は,彼らの死因のかなりの比率を占める。 昆虫はこの外骨格を異節化によってさらに進化させた。節足動物の体節構造は,その先行者である環形動物(ゴカイ,ミミズなど)でより明りょうに見られる同節性を出発点とする。… ※「異節化」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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