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Dinosaurios de cuatro alas procedentes de China.

Xing Xu¹, Zhonghe Zhou, Xiaolin Wang

¹Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, P.O. Box 643, Beijing 100044, China. xing_xu@sina.com

|January 24, 2003

Resumen

Los dinosaurios dromaeosaurios basales probablemente tenían cuatro alas y podían deslizarse, lo que sugiere una etapa intermedia en la evolución del vuelo aviar. Este hallazgo apoya la hipótesis de "tetrapteryx" para los antepasados de las aves primitivas.

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Área de la Ciencia:

Paleontología Paleontología.
Biología evolutiva Biología evolutiva.
La biomecánica es la biomecánica.

Sus antecedentes:

La hipótesis dinosauriana de los orígenes de las aves es ampliamente aceptada.
Los mecanismos precisos y las etapas de la evolución temprana del vuelo aviar siguen siendo objeto de debate.

Objetivo del estudio:

Para investigar las capacidades de vuelo de los dinosaurios dromeosaurios basales.
Proporcionar evidencia de una etapa intermedia en la evolución del vuelo de las aves.

Principales métodos:

Análisis de las evidencias fósiles de los dinosaurios dromeosaurios basales.
Estudios anatómicos comparados. estudios anatómicos comparados.

Principales resultados:

Nuevas evidencias sugieren que los dromeosáuridos basales tenían cuatro alas.
Estos dinosaurios probablemente poseían capacidades de deslizamiento.

Conclusiones:

Los dromeosáuridos basales representan una potencial etapa intermedia en la evolución del vuelo.
Los hallazgos apoyan la hipótesis de la etapa "tetrapteryx" (cuatro alas) para los antepasados de las aves.