Goniatitida

Japanese: Goniatitida
Goniatitida

...Large species with well-developed anaptyx-like jaws may have occasionally attacked other smaller ammonites.
[Evolutionary History]
The Ammonite subclass is divided into the Goniatitida, Ceratitida, and Ammonitida orders, and looking at their evolutionary history, there were two crises and subsequent changes between their appearance and extinction. The first was the decline of the Goniatite order at the end of the Permian period and the development of the Triassic Ceratitida to replace it. The second was the decline of the Ceratitida at the end of the Triassic period and the development of the Ammonite order from the Jurassic onwards.

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…よく発達したアナプチクス型の顎を備えた大型の種類は,ときに他の小型アンモナイトを襲った可能性がある。
[進化史]
 アンモナイト亜綱はゴニアタイト目Goniatitida,セラタイト目Ceratitida,アンモナイト目Ammonitidaに分けられるが,その進化史をみると,出現から絶滅までの間に,危機とそれに続く変革が2回あった。一つは二畳紀末期のゴニアタイト目の衰亡とそれに代わる三畳紀セラタイト目の発展であり,2回目は三畳紀末期のセラタイト目の衰亡とジュラ紀以後のアンモナイト目の発展である。…

※「Goniatitida」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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