ostracoderm

简明释义

英[/ˈɑstrəkoʊˌdɜrm/]美[/ˈɑstrəkoʊˌdɜrm/]

[古生] 甲胄鱼类

英英释义

单词用法

同义词

反义词

例句

1.Hill walkers find dinosaur bones sticking out of hillsides: schoolchildren pick up ostracoderm skeletons on the beach.

登山者们会发现山坡上露出的恐龙骨骼，小学生们会在海滩上捡到甲胄鱼(ostracoderm)的骨骼。

2.Hill walkers find dinosaur bones sticking out of hillsides: schoolchildren pick up ostracoderm skeletons on the beach.

登山者们会发现山坡上露出的恐龙骨骼，小学生们会在海滩上捡到甲胄鱼(ostracoderm)的骨骼。

3.Researchers are excited about new discoveries related to ostracoderm 甲壳鱼 in the fossil record.

研究人员对化石记录中与ostracoderm 甲壳鱼相关的新发现感到兴奋。

4.The anatomy of ostracoderms 甲壳鱼 provides insights into early jawless fish.

对ostracoderm 甲壳鱼的解剖学研究为早期无颌鱼类提供了见解。

5.Fossils of ostracoderms 甲壳鱼 have been found in various sedimentary rock layers.

在各种沉积岩层中发现了ostracoderm 甲壳鱼的化石。

6.The study of ancient fish like the ostracoderm 甲壳鱼 helps us understand the evolution of vertebrates.

研究像ostracoderm 甲壳鱼这样的古代鱼类有助于我们理解脊椎动物的进化。

7.Some scientists believe that ostracoderms 甲壳鱼 played a crucial role in the development of modern fish.

一些科学家认为，ostracoderm 甲壳鱼在现代鱼类的发展中起着关键作用。

作文

The study of ancient life forms provides fascinating insights into the evolution of species. One such intriguing group of organisms is the ostracoderm, which refers to a category of extinct jawless fish that existed during the Paleozoic era. These creatures are significant because they represent some of the earliest vertebrates in Earth's history. Understanding ostracoderms helps paleontologists and biologists piece together the evolutionary puzzle of how complex life evolved from simpler forms. Ostracoderms were primarily characterized by their bony armor, which offered protection against predators in the aquatic environments they inhabited. This adaptation was crucial for their survival during a time when the oceans were filled with various predatory species.The morphology of ostracoderms varied widely among different species. Some had elongated bodies, while others were more compact. Their body structure often featured a series of bony plates that acted as a protective shield. This unique feature distinguishes them from other fish, especially those with jaws that emerged later in evolutionary history. The presence of these bony structures indicates that ostracoderms were well-adapted to their environments, showcasing the diverse evolutionary paths that life can take.In addition to their physical characteristics, ostracoderms played a vital role in the ecosystem of their time. They were likely filter feeders, using their gill structures to extract nutrients from the water. This feeding strategy not only provided sustenance for the ostracoderms themselves but also contributed to the overall health of the marine ecosystems they inhabited. By filtering out particulates, they helped maintain water clarity and quality, which is essential for the survival of many aquatic organisms.The extinction of ostracoderms marks a significant event in the history of vertebrates. As the Earth underwent dramatic changes, including shifts in climate and oceanic conditions, these ancient fish could not adapt quickly enough to survive. Their disappearance paved the way for the emergence of jawed fish, which became the dominant group in aquatic environments. This evolutionary transition highlights the importance of adaptability in the survival of species and serves as a reminder of the ever-changing nature of life on Earth.Today, the study of ostracoderms continues to provide valuable information about early vertebrate evolution. Fossils of these creatures have been found in various locations around the world, allowing scientists to analyze their structure and understand their place in the evolutionary tree. By studying the characteristics of ostracoderms, researchers can gain insights into the development of critical features such as jaws and paired fins, which are present in modern fish.In conclusion, ostracoderms are a remarkable example of early vertebrate life that offers a glimpse into the past. Their unique adaptations and ecological roles illustrate the complexity of evolutionary processes. As we continue to explore the fossil record and uncover new findings, our understanding of ostracoderms and their significance in the history of life will undoubtedly deepen, enriching our knowledge of biological diversity and the intricate web of life that has developed over millions of years.

对古代生命形式的研究为物种进化提供了迷人的见解。其中一个引人入胜的生物群体是ostracoderm，指的是一种在古生代时期存在的已灭绝的无颌鱼类。这些生物之所以重要，是因为它们代表了地球历史上最早的脊椎动物之一。理解ostracoderms有助于古生物学家和生物学家拼凑出复杂生命如何从简单形式演变而来的进化拼图。Ostracoderms主要以其骨质盔甲为特征，这为它们在栖息的水域中提供了对捕食者的保护。这种适应性在一个海洋充满各种捕食物种的时代对它们的生存至关重要。不同物种之间，ostracoderms的形态各异。有些身体修长，而另一些则更加紧凑。它们的身体结构通常具有一系列骨质板，作为保护屏障。这一独特特征使它们与后期出现的其他鱼类（尤其是有颌鱼类）区分开来。这些骨质结构的存在表明，ostracoderms对其环境适应良好，展示了生命可以采取的多样进化路径。除了其物理特征外，ostracoderms在其时代的生态系统中也发挥了重要作用。它们可能是滤食性动物，利用其鳃结构从水中提取养分。这种觅食策略不仅为ostracoderms本身提供了营养，而且还促进了它们所栖息的海洋生态系统的整体健康。通过过滤颗粒，它们帮助维持水的清澈和质量，这对许多水生生物的生存至关重要。Ostracoderms的灭绝标志着脊椎动物历史上的一个重要事件。随着地球经历剧烈变化，包括气候和海洋条件的转变，这些古老的鱼类未能迅速适应生存。它们的消失为有颌鱼类的出现铺平了道路，后者成为水域中的主导群体。这一进化转型突显了适应能力在物种生存中的重要性，并提醒我们生命在地球上不断变化的本质。如今，ostracoderms的研究继续为早期脊椎动物进化提供宝贵信息。这些生物的化石已在世界各地发现，使科学家能够分析其结构并理解其在进化树中的位置。通过研究ostracoderms的特征，研究人员可以深入了解现代鱼类所具备的重要特征，如颌和成对鳍的发育。总之，ostracoderms是早期脊椎动物生命的一个非凡例子，为我们提供了对过去的洞察。它们独特的适应性和生态角色说明了进化过程的复杂性。随着我们继续探索化石记录并揭示新发现，我们对ostracoderms及其在生命历史中的重要性的理解无疑会加深，丰富我们对生物多样性和在数百万年中发展起来的复杂生命网络的知识。