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新的Archaeopteryx标本提供了关于羽毛发育的洞察力
Christian Foth1, Helmut Tischlinger2, Oliver W M Rauhut1
11] Staatliche Naturwissenschaftliche Sammlungen Bayerns, Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Straße 10, 80333 Munich, Germany [2] Department of Earth and Environmental Sciences and GeoBioCenter, Ludwig-Maximilians-Universität München, Richard-Wagner-Straße 10, 80333 Munich, Germany.
Nature
|July 4, 2014
概括
新的Archaeopteryx化石揭示了覆盖整个身体的羽毛,这表明早期的羽毛是为了展示而进化的,而不是飞行. 这表明早期鸟类的飞行起源更复杂.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 脊椎动物动物学 脊椎动物动物学
背景情况:
- 最近发现的鸟类类恐龙和基底类鸟类的发现为Archaeopteryx提供了背景.
- 类羽毛的进化起源和功能仍在争论中.
- 了解羽毛的进化是解读飞行起源的关键.
研究的目的:
- 为了描述一个具有广泛羽毛保存的新Archaeopteryx标本.
- 为了研究类羽毛的遗传分布和功能上下文.
- 为了澄清羽毛在鸟类早期进化的作用.
主要方法:
- 对一个新的Archaeopteryx标本进行了详细的形态分析.
- 在曼尼拉普托兰和基底鸟类中羽毛分布的家族遗传学分析.
- 基于分布和形态学的羽毛结构的功能解释.
主要成果:
- 这种新标本在整个身体,包括腿部,都表现出状的羽毛.
- 后肢表现出长长的,对称的羽毛在tibiotarsus和更短的在tarsometatarsus.
- 翅膀羽毛数据挑战了最近对羽毛功能的一些解释.
- 遗传学分析表明,状羽毛最初是为了展示而进化的,而不是飞行.
结论:
- 的羽毛很可能是取的,后来被选为飞行.
- 飞行进化的进化是一个复杂的过程,涉及到融合的适应.
- 早期的羽毛进化主要是由非空气动力学功能 (如显示) 驱动的.
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