歯の形態学と,アウストラロピテクス・セディバの遺伝学的な"場所"
Joel D Irish1, Debbie Guatelli-Steinberg, Scott S Legge
1Research Centre in Evolutionary Anthropology and Palaeoecology, School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool, UK. j.d.irish@ljmu.ac.uk
Science (New York, N.Y.)
|April 13, 2013
まとめ
アウストラロピテクス・セディバの歯の特徴は,原始的な特徴と派生的な特徴の混合を示しています. これらの発見は,南アフリカのアウストラロピス・クラードがホモと結びついていることを支持し,進化的つながりを示している.
科学分野:
- 古人類学は,古人類学である.
- プリマトロジーは,霊長類学です.
- 人間の進化 人類の進化
背景:
- アウストラロピテクス・セディバ (Australopithecus sediba) の下図は,さらなる特徴づけを必要としている.
- 歯の形態学は,ヒト類の進化に関する重要な洞察を提供します.
研究 の 目的:
- アウストラロピテクス・セディバ (Australopithecus sediba) の標本MH1とMH2の22の非メートル的な歯の特徴を詳しく説明します.
- これらの特徴を他のアフリカ系ホミニンと比較するために,系統遺伝分析を用いた.
主な方法:
- Au.で22の非メトリックの歯の特徴の記述 シディバ. シディバ.
- 他の8つのアフリカ人ホミニン標本との質的および遺伝的比較.
- ゴリラの外部群を用いたクラディスティック分析.
主要な成果:
- Au. オー. オー. オー. セディバは,原始的および派生的な歯の特徴のモザイクを展示しています.
- 東アフリカのアウストラロピスとの区別は,主にモラルの特徴で示された.
- 南アフリカのアウストラロピト群の形成とAu. africanusは,カラベッリのUM1やプロトスティリド LM1.1のような特徴を共有しています.
- Homo habilis/rudolfensis + Homo erectusとの共同派生状態の証拠がある.
結論:
- Au. オー. オー. オー. sediba は,AU との派生特性を共有しています. アフリカンヌス (Africanus) は,南アフリカのオーストラリアロピス (Australopith) の独特なクラードを形成する.
- 南アフリカのアウストラロピスと初期のホモとの間には,重要な進化的リンクが存在します.
- LM1 cusp 7発現によって証明された,南アフリカのアウストラロピスとホモを含むクラードを支持する歯の証拠.
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