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De Novo Generation of Somatic Stem Cells by YAP/TAZ
Published on: May 7, 2018
ニュナノゾアンの新しい種が,デウテロストームの進化に意味を持つ
Degan Shu1, Simon Conway Morris, Z F Zhang
1Early Life Institute and Department of Geology, Northwest University, Xi'an 710069, China. elidgshu@nwu.edu.cn
Science (New York, N.Y.)
|March 1, 2003
まとめ
カンブリア初期の動物であるユナノゾオンは,幹群デウテロストームとして再分類されています. 新しい化石の証拠は,彼らの状構造は,状動物の特徴から独立して進化したことを示唆しています.
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
- カンブリア期の初期生活
背景:
- ユンナノゾウはカンブリア初期のメタゾウである.
- デウテロストームに分類するかは議論の余地がある.
- 以前の研究では,ユナノゾーア類の状動物のような特徴が示唆されていた.
研究 の 目的:
- チェンジヤン Lagerstätteから新しい種,Haikouella jianshanensisを記述してください.
- ユンナノゾア類の系統遺伝的位置を明らかにする.
- 喉頭構造の進化的起源を調査する.
主な方法:
- 特殊保存された化石の詳細な形態学的分析.
- 化石標本の比較解剖学. 化石標本の比較解剖学. 化石標本の比較解剖学.
- 形態学的データに基づいた系統遺伝的推論.
主要な成果:
- 特殊な保存により,H. jianshanensis.の外部が明らかになった.
- 喉裂けはから独立して進化したようです.
- この種では,状動物のような構造は特定されなかった.
- コード類の枝状アーチは,複合構造である可能性があります.
結論:
- ユンナノゾア類は,幹群デウテロストームとして提案されている.
- ユンナノゾーアはベトリコリアンと同盟関係にある.
- この発見は,初期デウテロストーム進化の理解を洗練する.
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