Deuterostomy

Japanese: Deuterostomia
Deuterostomy

...Also, among the protozoans, phytoflagellates, which have plastids such as chlorophyll and take in nutrients like plants, have characteristics of both plants and animals. All multicellular animals, except for the phyla Protozoa, Mesozoa, Porifera, Coelenterata, and Ctenophora, are broadly divided into two groups: Protostomes (Protostomia) and Deuterostomia (Deuterostomia), based on the characteristics of development and the morphology of the larvae. Protostomes are a group of animals in which the blastopore becomes the mouth of the larva during the development of the egg, and later the anus is formed, while deuterostomes are a group of animals in which the blastopore becomes the anus, and later the mouth is formed. ...

*Some of the terminology that mentions "Deuterostomia" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また原生動物の中で葉緑素などの色素体をもち,植物的な栄養摂取を行っている植物性鞭毛虫は,植物と動物との両方の特徴を兼ね備えている。 多細胞動物で原生動物,中生動物,海綿動物(カイメン),腔腸動物,有櫛(ゆうしつ)動物の各動物門を除いたすべての動物門は発生における特徴と幼生の形態から前口動物Protostomiaと後口動物Deuterostomiaとに2大別される。前口動物とは卵の発生過程で原口が幼生の口になり,後に肛門ができる動物群であり,後口動物は原口が肛門になり,後に口ができる動物群である。…

※「Deuterostomia」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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