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四足類 （ 英語 ： tetrapod ）是一 支 主要為 適應 陸地環境 而 演化 的 有頜類 脊椎動物 ，在 生物分類學 上組成了 四足總綱 或 四足超綱 （ 學名 ： Tetrapoda ），包含 兩棲動物 和 羊膜動物 兩支，前者僅存 滑體類 一支，後者包括 合弓綱 （ 哺乳類 及其已 滅絕 ...
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 ...
消波塊（英語： Tetrapod ）又稱為防護塊或弱波石（英語： dolosse ） [1]，是在海岸或堤岸放置的大型水泥塊，用來吸收海浪或大水拍打的衝擊以保護海岸或河堤，常見的外形有點類似正四面體，是由中心點有水泥塊往四個方向伸展，分別對應正四面體的頂點。
2024年3月15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.
Clear fossil tetrapod tracks from the mid-Devonian predate previous tetrapod records by 18 million years. These tracks are from the Middle Devonian of Poland, nearly 400 million years ago. The footprints were made in the mud of a tropical lagoon, and no animal
2019年10月23日 · But the ancient bones of a newly discovered species of tetrapod now provide some crucial missing evidence. Fossils shed light on how aquatic vertebrates evolved into land dwellers.
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. Vertebrate tissue development is unique in its complexity.
The Four-Legged Vertebrates. The word "Tetrapoda" means "four legs" in Greek. Amphibians , reptiles (including dinosaurs and birds ) and mammals are the major groups of the Tetrapoda. Tetrapods include all land-living vertebrates, such as frogs, turtles, hawks, and lions. The group also includes a number of animals that have returned to life in ...
2021年8月23日 · The fish-to-tetrapod transition is one of the most iconic events in vertebrate evolution, yet fundamental questions regarding the dynamics of this transition remain unresolved.
2021年4月5日 · Pretty early in the Carboniferous, amphibians split off from the group that evolved into the rest of tetrapods that still live today. The remaining amniotes then split off just over 300 million years ago into the group that became mammals and the group that became reptiles, and eventually dinosaurs and birds.
