最大的淡水臭虫:一个南亚河流海豚,与原亚马逊的亲戚
Aldo Benites-Palomino1,2, Gabriel Aguirre-Fernández1, Patrice Baby3
1Department of Paleontology, University of Zurich, Karl-Schmid-Strasse 4, 8006 Zürich, Switzerland.
Science advances
|March 20, 2024
概括
在秘鲁发现的新化石海豚Pebanista yacuruna是已知的最大的淡水臭虫. 这一发现揭示了古代河豚 (Platanistidae) 在数百万年前居住在南美洲.
科学领域:
- 古生物学的古生物学
- 海洋生物学 海洋生物学
- 进化生物学 进化生物学
背景情况:
- 由于化石证据稀缺,人们对淡水海豚 (Platanistidae) 的进化了解甚少.
- 几种海豚系独立适应淡水环境.
研究的目的:
- 为了描述一种新的化石海豚物种,Pebanista yacuruna,来自秘鲁的米奥森原亚马逊.
- 为了确定Pebanista yacuruna的遗传位置和生态适应.
主要方法:
- 化石发现和Pebanista yacuruna的描述.
- 遗传学分析以建立进化关系.
- 基于化石证据的形态和生态解释.
主要成果:
- 皮巴尼斯塔 (Pebanista yacuruna) 被描述为一个新的属和物种,与Platanista有着密切的关系.
- 形态特征表明适应淡水环境.
- 皮巴尼斯塔·雅库鲁纳 (Pebanista yacuruna) 是最大的淡水臭虫,长度达到3米.
结论:
- 平类动物在南美洲的淡水生态系统中居住在早期至中期的米奥生.
- 发现Pebanista yacuruna早于现代的亚马逊河海豚.
- 这一发现凸显了古代亚马逊地区的重要资源供应和生物多样性.
更多相关视频
12:32Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans
Published on: September 27, 2020
8.7K
07:26Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
1.4K
相关概念视频
02:56The Fossil Record
25.1K
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...
25.1K
03:21Phylogenetic Trees
45.3K
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.
45.3K
02:32Osmoregulation in Fishes
49.6K
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
49.6K
02:35What is Evolutionary History?
36.4K
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.
36.4K
01:23Phylogeny
44.0K
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.
44.0K
01:17What is an Ecosystem?
39.6K
Overview
39.6K