Palaeocoppice

Japanese: Palaeocopa
Palaeocoppice

… [Masamichi Takeda]
[Fossils and lineages]
The oldest arthropod fossils are known from the end of the Precambrian period (sometimes called the Eocambrian period) about 700 million years ago, but it was only in the early Cambrian period about 600 million years ago that they began to have hard tissues such as chitin and calcareous matter, and trilobites and trilobites are representative of these. In the Paleozoic era, trilobites, as well as extinct arthropods such as Eurypterida, archaic ostracodes such as Leperditiida and Palaeocopida, flourished and produced many index fossils. Eurypterida flourished from the Silurian to the Devonian periods, with some reaching over 2 meters in length, making them the largest arthropods in history.

*Some of the terminology explanations that mention "Palaeocopa" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…【武田 正倫】
【化石と系統】
 もっとも古い節足動物化石は,約7億年前の先カンブリア時代末期(あるいは始カンブリア紀Eocambrianと呼ばれることもある)からすでに知られているが,キチン質や石灰質など硬組織をもつようになったのは,約6億年前のカンブリア紀初期からであり,三葉虫類や三葉形類が代表的である。古生代には,三葉虫類をはじめ,やはり絶滅節足動物である広翼類Eurypteridaや古型貝形虫類であるレペルディシア類Leperditiidaやパレオコパ類Palaeocopaなどが全盛をきわめ,多くの示準化石を輩出している。広翼類はシルル紀からデボン紀にかけておおいに栄え,体長2mを超えるものも出て史上最大の節足動物になった。…

※「Palaeocopa」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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