有证据表明,在中罗纪的茎类恐龙中,树木是存在的
David P Ford1, Roger B J Benson2, Elizabeth F Griffiths3
1Earth Sciences Department, Natural History Museum, London SW7 5BD, UK.
Proceedings. Biological sciences
|April 16, 2025
概括
马尔莫雷塔 (Marmoretta oxoniensis) 是一种干状类恐龙,适应了爬,而不是半水生生物. 这一发现为早期类动物的树木息地使用提供了第一个证据,揭示了中期中世时期的生态多样性.
科学领域:
- 古生物学的古生物学
- 脊椎动物动物学 脊椎动物动物学
- 进化生物学 进化生物学
背景情况:
- 类动物,包括类动物和类动物,包括超过11000个物种,但早期的化石记录很少.
- 由于化石标本不完整,了解早期Lepidosauria的生态多样性和进化背景是有限的.
- 来自英国的Middle Jurassic化石Marmoretta oxoniensis是一个保存良好的候选干皮龙.
研究的目的:
- 为了研究Marmoretta oxoniensis的古生态和息地.
- 重新评估之前的假设,建议马莫雷塔的半水生生活方式.
- 提供有关早期类动物生态多样性的见解.
主要方法:
- 使用微型计算机断层扫描 (μCT) 来分析部分Marmoretta oxoniensis骨的后解剖学.
- 检查胸部囊,手指形态和手动.
- 使用现存的状动物数据对手 (手) 进行线性分辨分析,以推断息地使用.
主要成果:
- 脑后解剖学表明了登的适应性,包括特定的囊细胞角和手动状细胞形态.
- 线性判别分析强烈支持粘附树木现实,将马莫雷塔置于扫描/树木象牙群内.
- 这些发现与之前基于沉积环境的半水生解释相矛盾.
结论:
- 马尔莫雷塔 (Marmoretta oxoniensis) 适应了树木生活方式,挑战了之前的半水生假设.
- 这项研究提供了第一个树木息地使用的证据.
- 马莫雷塔的树木现实照亮了中中纪生态社区的垂直结构.
相关概念视频
02:56The Fossil Record
24.8K
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...
24.8K
02:55The Evidence for Evolution
42.1K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
42.1K
01:23Phylogeny
43.4K
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.
43.4K
03:21Phylogenetic Trees
44.9K
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.
44.9K
02:26Non-vascular Seedless Plants
63.0K
The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
63.0K
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
31.7K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
31.7K