Tetrapod - Wikipedia
网页Tetrapod. A tetrapod (/ ˈtɛtrəˌpɒd /; [5] from Ancient Greek τετρα- (tetra-) 'four' and πούς (poús) 'foot') is any four- limbed vertebrate animal of the superclass Tetrapoda (/ tɛˈtræpədə /). [6] Tetrapods include all extant and extinct amphibians and amniotes, with the latter in turn evolving into two major clades, the ...
Tetrapod | Vertebrates, Amphibians, Reptiles | Britannica
网页2024年8月7日 · tetrapod, (superclass Tetrapoda), a superclass of animals that includes all limbed vertebrates (backboned animals) constituting the classes Amphibia (amphibians), Reptilia (reptiles), Aves (birds), Mammalia (mammals), and their direct ancestors that emerged roughly 397 million years ago during the Devonian Period.
The origin of tetrapods - Understanding Evolution
网页This ancient vertebrate lineage had fins (with lepidotrichia), scales, gills, and lived in the water. Yet they also had air bladders (air-filled sacs) connected to the back of their throats that could be used for breathing air (i.e., as lungs) or for buoyancy control.
Tetrapod (structure) - Wikipedia
网页A tetrapod is a form of wave-dissipating concrete block used to prevent erosion caused by weather and longshore drift, primarily to enforce coastal structures such as seawalls and breakwaters.
四足類 - 维基百科，自由的百科全书
网页四足類 （英語： tetrapod）是一 支 主要为 适应 陆地环境 而 演化 的 有颌类 脊椎动物，在 生物分类学 上组成了 四足总纲 或 四足超纲 （學名： Tetrapoda），包含 两栖动物 和 羊膜动物 两类，前者包括仅存的 滑体类 和已 灭绝 的 离片椎类 与 壳椎类，后者包括 合弓纲 （现生 的 哺乳类 及其已灭绝的 兽孔目 和 盘龙目 亲族）和 蜥形纲 （现生的 爬行类 、 鸟类 和其已灭绝的各类史前亲族）两大 演化支。 四足动物是 四足形類 的 冠群，由 泥盆紀 晚期的 淡水 …
Vertebrate - Tetrapods, Anatomy, Adaptations | Britannica
网页2024年9月11日 · Vertebrate - Tetrapods, Anatomy, Adaptations: Tetrapods live primarily on land and are similar in habit. Members include amphibians, reptiles, birds, and mammals. Features include the notochord, dorsal nerve tube, and pharyngeal slits. Support and protection are provided by the exoskeleton, when present, and the endoskeleton.
What Makes Tetrapods Different From Other Animals? - ThoughtCo
网页2019年7月29日 · Tetrapods are a group of vertebrates that includes amphibians, reptiles, birds, and mammals. Tetrapods include all living land vertebrates as well as some former land vertebrates that have since adopted an aquatic lifestyle (such as whales, dolphins, seals, sea lions, sea turtles, and sea snakes).
What Is a Tetrapod? - WorldAtlas
网页2018年10月3日 · Tetrapods are a sub-group of animals known as Sarcopterygii. The term “tetrapod” refers to land-living animals such as hawks, frogs, and turtles. They also include marine animals such as sea lions, whales, sea snakes, seals, dolphins, and sea turtles.
The Rise of the Tetrapods: How Our Early Ancestors Left Water …
网页2021年4月5日 · Acanthostega and Ichthyostega represent the most complete surviving fossils we have discovered of the earliest tetrapods, a group whose descendants would be the first vertebrate creatures to leave the oceans and walk on land.
From fins to legs to fins again | Earth | EarthSky
网页2015年4月20日 · Whales, dolphins, seals and sea turtles are members of an exceptional group of animals, called marine tetrapods, that have moved from the sea to the land and back to the sea again over the last...