Differential division - Ibunkatsu

Japanese: 異分割 - いぶんかつ
Differential division - Ibunkatsu

…In planarians, which are turbulent worms, the body splits horizontally along the body axis, but before the body separates, the head differentiates in front of the posterior half. This type of division in which the part that should be lost by division is formed before the body separates is called a heterodivision paratomy. [Takashi Kitagawa] …

*Some of the terminology explanations that refer to "different division" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…渦虫類のプラナリアでは体軸に対して横に分裂するが,体が分離する前に後半部の前方に頭部が分化する。このように分裂によって失われるべき部分が分離する以前に形成される場合の分裂をとくに異分割paratomyという。【北川 尚史】。…

※「異分割」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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