ユーラシア の ミオセーン 時代 の 小型 類人猿 は 人間 の 進化 に つい て 明らか に なり まし た
David M Alba1, Sergio Almécija2, Daniel DeMiguel1
1Institut Català de Paleontologia Miquel Crusafont (ICP), Universitat Autònoma de Barcelona (UAB), Edifici ICTA-ICP, Carrer de les Columnes sense número, Campus de la UAB, 08193 Cerdanyola del Vallès, Barcelona, Spain.
Science (New York, N.Y.)
|October 31, 2015
まとめ
ミオセンの新種の霊長類の化石は 原始的な特徴と 派生した特徴のモザイクを示しています この発見は 初期のヒト類の進化と 類人猿と人間の祖先の理解を 変えてくれます
科学分野:
- 古霊長類学
- 霊長類の進化
- 化石 の 発見
背景:
- アフリカとユーラシアのミオセンの小型の類人猿は,現存するカタリン類 (ホミノイドと旧世界類人猿) の祖先と考えられています.
- これらの初期の霊長類は 幹猿のプロコンスルよりも 原始的と考えられています
- 小型カタリン類の進化的位置は,ヒト類の起源に関連して進行中の研究の対象となっている.
研究 の 目的:
- イベリア・ミオセンの新発見の小型の霊長類であるPliobates cataloniae gen. et spを記述する. ノブ
- 類人長類の進化樹の中でPliobates cataloniaeの系統的位置を分析する.
- 類人猿の進化における 小型カタリーンの役割を再評価し,ヒロバティドとホミニドの最後の共通の祖先についての洞察を得ること.
主な方法:
- 頭蓋骨と頭蓋骨後の要素を含むPliobates cataloniaeの化石の記述
- クラディスティック分析を用いて,Pliobates cataloniaeの遺伝関係を決定する.
- プリオバテス・カタロニアの特徴と他のミオセンの霊長類と現存するカタリン類の特徴の比較.
主要な成果:
- プリオバテス・カタロニア (Pliobates cataloniae) は1160万年前のイベリア・ミオセンの小型の霊長類である.
- 化石は原始的な特徴のモザイクを現存するホミノイドの共通派生特徴と並べています
- クラディスティック分析では,Pliobates cataloniaeは,Proconsulや他の前述の小さなカタリンよりより多く派生した幹型ホミノイドである.
結論:
- プリオバテス・カタロニアは 初期の類人猿の進化に関する以前の仮定に 異議を唱えるような 重要な幹型のヒト類である.
- この発見は,小型のカタリンがヒトの多様化に 与える進化的貢献の再評価を 求めています
- この発見はギボンと類人猿の最後の共通の祖先の特徴について 重要な洞察を与えてくれます
関連する概念動画
02:56The Fossil Record
28.5K
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...
28.5K
02:31Synteny and Evolution
4.0K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
4.0K
01:24Eukaryotic Evolution
43.6K
The endosymbiont theory is the most widely accepted theory of eukaryotic evolution; however, its progression is still somewhat debated. According to the nucleus-first hypothesis, the ancestral prokaryote first evolved a membrane to enclose DNA and form the nucleus. Conversely, the mitochondria-first hypothesis suggests that the nucleus was formed after endosymbiosis of mitochondria.
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
43.6K
01:24Evolution of New Traits in Microbes
104
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
104
02:54Evolutionary Relationships through Genome Comparisons
7.2K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
7.2K
01:08Evolution of Microbial Genome
46
Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
46