'Thecodontia'是由拉丁语组成的词语，意思是“有牙槽的动物”，常用于指恐龙与鳄鱼等类似动物。这个词语最初由英国古生物学家理查德·欧文（Richard Owen）在xx年提出，并被广泛采纳。
例句：
1. Thecodontia is a group of reptiles that existed from the late Permian to the early Jurassic. （Thecodontia是一类爬行动物，存在于晚二叠世到早侏罗纪。）
2. Thecodontia is characterized by their triangular teeth that are set in deep sockets. （Thecodontia以其三角形的牙齿和深度牙槽为特征。）
3. Thecodontia were the first reptiles to develop bipedalism, or the ability to walk on two legs. （Thecodontia是第一批发展出直立双足步行能力的爬行动物。）
4. Some of the most well-known members of Thecodontia are the dinosaurs. （Thecodontia中最为著名的成员之一就是恐龙。）
5. Thecodontia were once thought to be the ancestors of modern crocodiles, but this theory has been disputed. （Thecodontia曾被认为是现代鳄鱼的祖先，但这种理论已经遭到质疑。）
6. Thecodontia were a diverse group of reptiles that included herbivores, carnivores, and omnivores. （Thecodontia是一类多样化的爬行动物，包括食草动物、食肉动物和杂食动物。）
7. Many of the fossils belonging to Thecodontia have been found in Africa and South America. （许多属于Thecodontia的化石被发现在非洲和南美洲。）
8. Thecodontia were an important part of the Earth's ecosystems during the Mesozoic Era. （Thecodontia是中生代地球生态系统的重要组成部分。）
9. Thecodontia are no longer extant, but their fossil remains continue to offer valuable insights into the evolutionary history of reptiles. （Thecodontia已经灭绝，但它们的化石遗骸继续为我们提供有价值的爬行动物进化史方面的见解。）
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