Diapsida

…(3) The Euryapsida subclass, which has one upper temporal fenestra and whose lower edge is lined with the postorbital and squamosals, is made up mainly of marine reptiles, including the orders Chiroptera, Placodonts, and Ichthyosauria. (4) The Diapsida subclass, which has two temporal fenestrae and is separated by the postorbital and squamosals, is made up of mostly ruling reptiles, and was the most prosperous of all Mesozoic reptiles. Its members include dinosaurs, pterosaurs, and squamates (lizards, snakes, etc.). …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…(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。恐竜，翼竜および有鱗類(トカゲ，ヘビなど)などが属する。…

※「Diapsida」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