archosaur

简明释义

英[ˈɑːkəsɔː]美[ˈɑrkəˌsɔr]

n. 祖龙；古蜥（一种古爬行动物）

英英释义

单词用法

同义词

反义词

例句

1.Archaelogists also discovered a number of larger land-based animals and plant fossils including the sharp tooth of an archosaur and the remains of some ancient conifer-like plants.

考古学家同事发现许多大型陆地动物和植物化石，比如一只祖龙的尖牙和一些古代针叶松类型的植物化石。

2.Among the remnants are rare fragments of land life that survived the same period, including part of a conifer plant and the tooth of an archosaur reptile.

在残骸中，罕有幸存的同一时期陆地生物的碎片，包括部分松树和一种爬行动物古蜥的牙齿。

3.Dinosaurs split off early from the crocodile family tree, paleontologists suggested Wednesday, based on the discovery of a 240-million-year-old fossil "archosaur."

恐龙在很早以前就从鳄鱼家族的家谱中分化出来了，这一论点是古生物学家在周三根据新发现的二百四十万年前的祖龙化石提出的。

4.The tooth of an archosaur, left, which was a direct ancestor of many dinosaurs, and the complete skeleton, including soft tissue of a horseshoe crab, right.

左图，是古蜥蜴的牙齿，它是很多恐龙的直系祖先；右图，是一个完整的马蹄蟹的头盖骨。

5.The find moves several species thought to belong to crocodile family fossils to the archosaur side of species lines, and indicates the dinosaur family had deeper roots than previously suspected.

这一发现推动了一些之前被认为是属于鳄鱼家族化石中的物种向祖龙这一边的进化链靠拢，这也证实了恐龙家族有着比之前的推测更深厚的根源所在。

6.The find moves several species thought to belong to crocodile family fossils to the archosaur side of species lines, and indicates the dinosaur family had deeper roots than previously suspected.

这一发现推动了一些之前被认为是属于鳄鱼家族化石中的物种向祖龙这一边的进化链靠拢，这也证实了恐龙家族有着比之前的推测更深厚的根源所在。

7.The term archosaur refers to a group of reptiles that includes dinosaurs and modern birds.

术语archosaur指的是包括恐龙和现代鸟类在内的一类爬行动物。

8.Fossils of large archosaurs have been found in various parts of the world.

在世界各地发现了大型archosaurs的化石。

9.Some believe that birds are the closest living relatives of archosaurs.

有些人认为，鸟类是与archosaurs最亲近的现存亲属。

10.The extinction of non-avian archosaurs at the end of the Cretaceous period was a significant event in Earth's history.

白垩纪末期非鸟类archosaurs的灭绝是地球历史上的一个重要事件。

11.Paleontologists study fossils to learn more about the evolution of archosaurs.

古生物学家研究化石以了解更多关于archosaurs的进化。

作文

The term archosaur refers to a clade of reptiles that includes modern birds and crocodilians, as well as their extinct relatives such as dinosaurs and pterosaurs. Understanding archosaurs is crucial for comprehending the evolutionary history of vertebrates, particularly the transition from non-avian dinosaurs to modern birds. This group emerged during the Late Permian period, approximately 250 million years ago, and rapidly diversified in the Mesozoic era. Their unique adaptations allowed them to dominate terrestrial ecosystems, showcasing an incredible range of sizes and forms.One of the most fascinating aspects of archosaurs is their evolutionary significance. They are characterized by specific features such as a hole in the skull in front of the eye, which distinguishes them from other reptiles. This adaptation not only allowed for more efficient muscle attachment but also contributed to their diverse feeding strategies. For instance, some archosaurs evolved into massive predators like Tyrannosaurus rex, while others became agile flyers like Pteranodon.The extinction event at the end of the Cretaceous period, around 66 million years ago, led to the demise of non-avian dinosaurs. However, it also paved the way for the rise of modern birds, which are considered the only surviving archosaurs. This remarkable transition highlights the resilience and adaptability of this lineage. Birds have since evolved into a myriad of species, filling ecological niches that were once occupied by their dinosaur ancestors.Crocodilians, another group of archosaurs, provide insight into the lifestyle and behavior of ancient reptiles. With their semi-aquatic adaptations, they have remained relatively unchanged for millions of years, serving as a living link to the past. Studying these creatures helps paleontologists understand the ecological roles that archosaurs played in prehistoric environments.In recent years, advances in technology have allowed scientists to explore the genetics of archosaurs further. By analyzing DNA from fossils and living species, researchers can reconstruct evolutionary relationships and gain insights into how these animals adapted to changing climates and habitats. This research not only enhances our understanding of archosaurs but also informs conservation efforts for their modern descendants.In conclusion, the study of archosaurs offers a window into the past, revealing the intricate web of life that has existed on Earth for millions of years. Their evolutionary journey showcases the power of adaptation and survival in the face of environmental changes. As we continue to uncover the secrets of these ancient reptiles, we gain a deeper appreciation for the biodiversity that exists today and the importance of preserving it for future generations. The legacy of archosaurs lives on through birds and crocodilians, reminding us of the dynamic and ever-changing nature of life on our planet.

术语archosaur指的是一类爬行动物，包括现代鸟类和鳄鱼，以及它们的灭绝亲属，如恐龙和翼龙。理解archosaurs对于理解脊椎动物的进化历史至关重要，特别是从非鸟类恐龙到现代鸟类的过渡。这一群体在大约2.5亿年前的晚二叠世期间出现，并在中生代迅速多样化。它们独特的适应能力使它们能够主宰陆地生态系统，展示出令人难以置信的大小和形态范围。archosaurs最令人着迷的方面之一是它们的进化意义。它们的特征包括眼睛前面有一个孔，这使它们与其他爬行动物区分开来。这种适应不仅允许更有效的肌肉附着，还促进了它们多样的捕食策略。例如，一些archosaurs演变成了像霸王龙这样的巨大掠食者，而另一些则演变成了像翼龙这样的灵活飞行者。在白垩纪末期的灭绝事件，约6600万年前，导致了非鸟类恐龙的灭绝。然而，它也为现代鸟类的崛起铺平了道路，现代鸟类被认为是唯一幸存的archosaurs。这一显著的过渡突显了这一谱系的韧性和适应能力。鸟类随后演变成无数物种，填补了曾经由它们的恐龙祖先占据的生态位。鳄鱼，另一类archosaurs，提供了对古代爬行动物生活方式和行为的洞察。凭借其半水生的适应能力，它们在数百万年内保持相对不变，成为与过去的活链接。研究这些生物有助于古生物学家了解archosaurs在史前环境中的生态角色。近年来，技术的进步使科学家能够进一步探索archosaurs的遗传学。通过分析来自化石和现存物种的DNA，研究人员可以重建进化关系，并深入了解这些动物如何适应气候和栖息地的变化。这项研究不仅增强了我们对archosaurs的理解，而且为现代后代的保护工作提供了信息。总之，archosaurs的研究为我们提供了一扇通往过去的窗口，揭示了数百万年来地球上存在的复杂生命网络。它们的进化历程展示了在环境变化面前适应和生存的力量。随着我们继续揭示这些古代爬行动物的秘密，我们对今天存在的生物多样性以及为未来世代保护它的重要性有了更深的理解。archosaurs的遗产通过鸟类和鳄鱼延续着，提醒我们地球上生命的动态和不断变化的本质。