pelycosaur

简明释义

英[ˈpɛlɪkoʊsɔr]美[ˈpɛlɪkoʊsɔr]

n. 盘龙

英英释义

单词用法

同义词

反义词

例句

1.It is a family of reptiles of the order pelycosaur ia.

这是盘龙目爬行动物的一科。

2.It is a family of reptiles of the order pelycosaur ia.

这是盘龙目爬行动物的一科。

3.The fossilized remains of a pelycosaur were discovered in the desert, providing insight into prehistoric life.

在沙漠中发现的化石遗骸是一种古爬行动物，为史前生活提供了洞察。

4.Scientists believe that the pelycosaur was one of the first vertebrates to regulate its body temperature.

科学家认为，古爬行动物是最早能够调节体温的脊椎动物之一。

5.In the late Paleozoic era, the pelycosaur dominated the land with its unique adaptations.

在晚古生代，古爬行动物凭借其独特的适应能力主宰了陆地。

6.The large sail on the back of a pelycosaur may have been used for thermoregulation or display.

一只古爬行动物背上的大帆可能用于温度调节或展示。

7.Paleontologists often study pelycosaurs to understand the evolution of early mammals.

古生物学家经常研究古爬行动物以了解早期哺乳动物的演化。

作文

The study of prehistoric creatures is a fascinating journey into the past, revealing the evolution of life on Earth. Among these ancient beings, the pelycosaur stands out as a remarkable example of early terrestrial vertebrates. The term pelycosaur refers to a group of synapsid reptiles that lived during the late Carboniferous to the early Triassic periods, approximately 300 to 250 million years ago. These creatures are often considered precursors to modern mammals, showcasing a significant step in the evolutionary chain. One of the most notable characteristics of pelycosaurs is their distinctive sail-like structure on their backs, formed by elongated neural spines. This structure varies among different species and may have served various purposes, including thermoregulation, display, or even as a means to intimidate rivals. For instance, the famous pelycosaur, Dimetrodon, is often depicted with an impressive sail, making it a popular subject in both scientific literature and popular media. The anatomy of pelycosaurs provides insight into their lifestyle and ecological roles. They were primarily carnivorous, with sharp teeth adapted for tearing flesh. Their limb structure indicates that they were capable of both sprawling and more upright postures, suggesting a level of adaptability that would later be crucial for the evolution of more advanced vertebrates. The transition from the sprawling gait of pelycosaurs to the more efficient, upright stance seen in later mammals marks a significant milestone in the history of vertebrate locomotion. Moreover, the extinction of pelycosaurs at the end of the Permian period, during the largest mass extinction in Earth's history, paved the way for the rise of dinosaurs and ultimately mammals. This extinction event was catastrophic, leading to the loss of approximately 90% of marine species and 70% of terrestrial vertebrates. However, the lineage of pelycosaurs survived in a modified form, contributing to the evolution of mammals in the Mesozoic era. In conclusion, the pelycosaur represents a crucial chapter in the narrative of life's evolution on our planet. By studying these ancient reptiles, scientists can gain valuable insights into the adaptations and changes that have occurred over millions of years. The legacy of pelycosaurs serves as a reminder of the dynamic nature of life, where extinction and evolution go hand in hand, shaping the biodiversity we see today. Understanding such creatures not only enriches our knowledge of paleontology but also provides a deeper appreciation for the complexity of life itself.

对史前生物的研究是一次迷人的历史之旅，揭示了地球上生命的演变。在这些古老的生物中，pelycosaur作为早期陆生脊椎动物的一个显著例子而脱颖而出。术语pelycosaur指的是一类在晚石炭纪到早三叠纪时期生活的合弓纲爬行动物，大约在3亿到2.5亿年前。这些生物常被视为现代哺乳动物的前身，展示了进化链中的重要一步。 pelycosaurs最显著的特征之一是它们背部独特的帆状结构，由延长的神经棘形成。这个结构在不同物种之间有所变化，可能具有多种用途，包括温度调节、展示，甚至用来威吓对手。例如，著名的pelycosaur迪美特龙（Dimetrodon）常被描绘成拥有令人印象深刻的帆，使其成为科学文献和大众媒体中的热门主题。 pelycosaurs的解剖结构提供了对其生活方式和生态角色的洞察。它们主要是肉食性的，拥有适合撕裂肉类的锋利牙齿。它们的肢体结构表明它们能够采取横卧和更直立的姿势，这暗示着一种适应性，而这种适应性在更高级脊椎动物的进化中至关重要。从pelycosaurs的横卧步态到后来的哺乳动物更有效的直立姿态的过渡，标志着脊椎动物运动史上的一个重要里程碑。 此外，pelycosaurs在二叠纪末期的灭绝，发生在地球历史上最大的大灭绝事件中，为恐龙的崛起和最终的哺乳动物铺平了道路。这场灭绝事件是灾难性的，导致大约90%的海洋物种和70%的陆生脊椎动物的消失。然而，pelycosaurs的谱系以一种修饰的形式幸存下来，为中生代哺乳动物的进化作出了贡献。 总之，pelycosaur代表了我们星球生命演化叙事中的一个重要篇章。通过研究这些古代爬行动物，科学家可以获得关于数百万年间发生的适应和变化的宝贵见解。pelycosaurs的遗产提醒我们，生命的动态本质，灭绝与进化相辅相成，塑造了我们今天所看到的生物多样性。理解这样的生物不仅丰富了我们对古生物学的知识，也加深了我们对生命复杂性的欣赏。