Giant scorpion - Giant scorpion

Japanese: オオサソリ類 - おおさそりるい
Giant scorpion - Giant scorpion

...They range from tiny ones less than 3cm in length to large ones such as the African emperor scorpion, which can reach 17.5cm in length.
[Appearance on Earth]
During the Paleozoic era, 200 to 500 million years ago, a scorpion-like animal called the Erythropoda (giant scorpions) lived in the sea, with a body length of 1 to 3 meters. This animal became extinct during the Permian period, but modern scorpions seem to have a common ancestor with this animal, and during the Silurian period (300 to 400 million years ago), they became smaller and moved to a land-based lifestyle.

*Some of the terminology that refers to "giant scorpions" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…全長3cmに満たない小型のものから,アフリカのダイオウサソリのように17.5cmに達するものまである。
[地球上への出現]
 今から2億~5億年前の古生代には,広翼類(オオサソリ類)という体長が1~3mもあるサソリに似た動物が海中に生息していた。これは二畳紀に絶滅してしまったが,現在のサソリはこの類と共通の祖先をもつものらしく,シルル紀(3億~4億年前)のころに小型化して陸上生活に移った。…

※「オオサソリ類」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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