Diapsids ("two arches") are a clade of sauropsids, distinguished from more primitive eureptiles by the presence of two holes, known as temporal fenestrae, in each side of their skulls. The earliest traditionally identified diapsids, the araeoscelidians, appeared about three hundred million years ago during the late Carboniferous period. [1] .

雙孔亞綱 （Diapsida）也作 双弓亚纲，是群頭骨兩側各有兩個 顳顬孔 的四足動物，首次出現於三億年前的 石炭紀 晚期 [1]。 現存的雙孔動物非常多樣化，包括： 鳥類 、 鱷魚 、 烏龜 、 蜥蜴 、 蛇 、 喙頭蜥。 有些失去一個 顳顬孔 （蜥蜴），有些失去兩個（蛇），某些物種甚至大幅特化的頭骨（現代鳥類），根據最近的共同祖先，牠們仍然被分類於雙孔亞綱。 現在有至少7,925物種的雙孔類爬行動物存活在世界上，若將鳥類計入，則將接近18,000種。 雙孔亞綱的兩個 顳顬孔 分 …

双孔亚纲(Diapsida)，又译双弓亚纲，是中生代最繁盛和最重要的爬行动物，种类繁多，现生爬行动物中，除龟鳖类外，其余三个目(喙头目、有鳞目和鳄目)都属于这一亚纲。

All members of the group called the Reptilia (see below), except for the anapsids (turtles and their ilk), and a few extinct groups, are diapsids. The main diagnostic physical character for a diapsid is the presence of two openings on each side of the skull; the upper and lower temporal openings, i.e., the post-orbital fenestrae (right).

2008年6月28日 · A cladistic classification of the Diapsida is given, as well as a phylogenetic tree which uses cladistic and stratigraphic data. Reptilia , Diapsida , taxonomy , classification , cladistics , evolution , Permian , Triassic

For much of the past century, the classification of amniotes closely reflected fenestration; and hence Anapsida, Diapsida, Euryapsida, and Synapsida were used as formal names for amniote radiations. More recently, however, we have realized that while the pattern of fenestration does broadly reflect amniote evolution, it is not tied as strictly ...

diapsid，英语单词，主要用作名词、形容词，作名词时译为“无孔类爬行动物”，作形容词时译为“无孔类爬行动物的；具双窝的，双窝型的”。 [1] 现存的爬行纲动物分为2型、3亚纲、6目,即无窝型 (Anapsida)：龟鳖亚纲龟鳖目,有220种（中国有24种）;双窝型 (Diapsida)：古蜥亚纲鳄形目.. ...调孔型euryapsid双孔型diapsid恐龙蛋dinosauregg... ...二弓型dipsida;diapsid二源型的diarch丙二酚型isphenol... [1] diapsid，英语单词，主要用作名词、形容词，作名词时译为“无孔类爬行动物”， …

Diapsids are by far the most speciose group of amniotes, with about 14 600 extant species (Goin et al., 1978). They have invaded all major habitats, from the polar circles (many migratory birds) to deserts (many lizards) and even the ocean (sea snakes, sauropterygians).

2023年12月13日 · Diapsids ("two arches") are a group of amniote tetrapods that developed two holes (temporal fenestra) in each side of their skulls about 300 million years ago during the late Carboniferous period. The diapsids are extremely diverse, and include all crocodiles, lizards, snakes, tuatara, turtles, and dinosaurs (both avian and non-avian).

2024年4月26日 · 双孔亚纲（Diapsida）也作双弓亚纲，是群头骨两侧各有两个颞颥孔的四足动物，首次出现于三亿年前的石炭纪晚期 [1] 。 现存的双孔动物非常多样化，包括： 鸟类 、 鳄鱼 、 乌龟 、 蜥蜴 、 蛇 、 喙头蜥 。