The early origin of a birdlike inner ear and the evolution of dinosaurian movement and vocalization
The early origin of a birdlike inner ear and the evolution of dinosaurian movement and vocalization
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DOI：
10.1126/science.abb4305
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发表时间：
2021-05-07
期刊：
影响因子：
56.9
通讯作者：
Bhullar, Bhart-Anjan S.
中科院分区：
文献类型：
--
作者：
Hanson, Michael;Hoffman, Eva A.;Bhullar, Bhart-Anjan S.
爬行动物，包括鸟类，表现出一系列与行为相关的适应性，这些适应性反映在内耳结构的变化中。这些适应包括飞行能力和对高频声音的敏感性。我们使用了一个大样本的现存和灭绝的爬行动物的三维形态分析，以调查内耳相关的运动能力和听力敏锐度。统计分析显示，三个前庭形态，最好的解释三个运动类别四足动物，两足动物和简单的飞行员（包括两足nonavialan恐龙），和高机动性飞行员。伤齿龙与始祖鸟一样，属于现存的低机动性飞行动物。对耳蜗形状的分析揭示了一个单一的伸长的例子，在主龙类的茎上。我们认为，这种转变恰逢高音调的青少年的位置，报警，孵化同步呼叫和成人对他们的反应的起源。
Reptiles, including birds, exhibit a range of behaviorally relevant adaptations that are reflected in changes to the structure of the inner ear. These adaptations include the capacity for flight and sensitivity to high-frequency sound. We used three-dimensional morphometric analyses of a large sample of extant and extinct reptiles to investigate inner ear correlates of locomotor ability and hearing acuity. Statistical analyses revealed three vestibular morphotypes, best explained by three locomotor categories-quadrupeds, bipeds and simple fliers (including bipedal nonavialan dinosaurs), and high-maneuverability fliers. Troodontids fall with Archaeopteryx among the extant low-maneuverability fliers. Analyses of cochlear shape revealed a single instance of elongation, on the stem of Archosauria. We suggest that this transformation coincided with the origin of both high-pitched juvenile location, alarm, and hatching-synchronization calls and adult responses to them.