初期の化石のコルダ類と脊椎動物に関する事実と幻想
1Muséum National d'Histoire Naturelle, UMR7207 du CNRS (Sorbonne Universités, UPMC), 8 rue Buffon, 75231 Paris, France.
Nature
|April 24, 2015
まとめ
化石の発見は,脊椎動物の進化的解剖学に関するユニークな洞察を提供します. 考古学者は,真の古代脊椎動物の化石と誤った解釈を区別する課題に直面しています.
科学分野:
- パレオントロジー・パレオントロジー
- 進化生物学の進化生物学について
- 比較解剖学 比較解剖学とは
背景:
- 主要な生きている脊椎動物と状動物の相互関係は,分子および解剖学的データを通してよく確立されています.
- 化石の証拠は,重要な,しばしば予期せぬ,解剖学的組み合わせを提供します.
- 脊椎動物の起源を理解するには,初期の化石の証拠の解釈に頼るが,それは曖昧である.
研究 の 目的:
- 数百万年にわたる脊椎動物の解剖学的進化の形成を理解する上で化石の重要性を強調する.
- 初期の脊椎動物の化石を特定する際の課題について議論する.
主な方法:
- 分子配列データの分析.
- 比較解剖学的および生理学的研究.
- 軟組織の痕跡や骨格の断片を含む化石の証拠の調査.
主要な成果:
- 分子や解剖学的データが現代の集団関係を解明する一方で,化石はユニークな特徴の組み合わせを明らかにする.
- 初期の脊椎動物の化石は,繊細な印や小さな断片として保存されています.
- 信頼できる脊椎動物の化石と誤った解釈を区別することは,古生物学者の課題です.
結論:
- 化石は,脊椎動物の解剖学の進化の歴史を再構築するために不可欠です.
- 初期の脊椎動物の化石を解釈するには,時代遅れの仮定を避けるために,慎重に考古学的分析を行う必要があります.
関連する概念動画
The Fossil Record
28.6K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
28.6K
What is Evolutionary History?
45.1K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
45.1K
Convergent Evolution
34.7K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
34.7K
Phylogenetic Trees
52.2K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
52.2K
The Colonization of Land
38.8K
Changes in the environment of the early Earth drove the evolution of organisms. As prokaryotic organisms in the oceans began to photosynthesize, they produced oxygen. Eventually, oxygen saturated the oceans and entered the air, resulting in an increase in atmospheric oxygen concentration, known as the oxygen revolution approximately 2.3 billion years ago. Therefore, organisms that could use oxygen for cellular respiration had an advantage. More than 1.5 years ago, eukaryotic cells and...
38.8K
Phylogeny
64.8K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
64.8K


