Jamoytius

Japanese: Jamoytius
Jamoytius

...It is thought that this round part moved up and down to suck in and release water. The cyclostomes, including those that flourished in the Silurian Period such as Jamoytius and Birkenia , are thought to be the ancestors of modern cyclostomes. They have a series of gill slits on the sides of their bodies.

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このまるい部分が上下に動いて水を吸ったり出したりしたと考えられている。欠甲類はヤモイティウスJamoytius,ビルケニアBirkeniaなどシルル紀に栄えたものを含み,現在の円口類などの祖先ではないかとも考えられている。体側に一連の鰓孔が開いている。…

※「Jamoytius」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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