Euryapsida

…(2) The Synapsida, a group of mammal-like reptiles with one lateral fenestra and the postorbital and squamosals on its upper edge, is thought to be a successor to mammals. (3) The Euryapsida, a group of platysids with one upper temporal fenestra and the postorbital and squamosals on its lower edge, is mainly made up of marine reptiles, including the orders Chiroptera, Placodonts, and Ichthyosaurs. (4) Many members of the Diapsida, a group of diapsids with two temporal fenestra and separated by the postorbital and squamosals, are called ruling reptiles, and were the most prosperous of all Mesozoic reptiles. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…(2)外側頭窓が一つで，その上縁に後眼窩骨と鱗状骨が並ぶ単弓亜綱Synapsidaは哺乳類型爬虫類の一群で，哺乳類に続くものと考えられている。(3)上側頭窓が一つあり，その下縁に後眼窩骨と鱗状骨が並ぶ広弓亜綱Euryapsidaは海生爬虫類が主で，鰭竜（きりゆう）目，板歯目，魚竜目などが属する。(4)側頭窓が2個で，後眼窩骨と鱗状骨がそれらを分ける双弓亜綱Diapsidaの多くは支配的爬虫類ruling reptilesと呼ばれ，中生代の爬虫類の中で最も栄えた。…

※「Euryapsida」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。

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