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Pruebas de la geometría de las garras que indican hábitos arbóreos de Archaeopteryx
Resumen
Archaeopteryx, considerado durante mucho tiempo un depredador corredor, era probablemente un pájaro posado. Un nuevo análisis de la curvatura de sus garras sugiere adaptaciones arbóreas, no depredadores terrestres.
Área de la Ciencia:
- Paleontología Paleontología.
- Biología evolutiva Biología evolutiva.
- La biomecánica es la biomecánica.
Sus antecedentes:
- Archaeopteryx es un fósil fundamental para comprender la evolución de las aves.
- Tradicionalmente se ha interpretado como un depredador cursorial, una etapa terrestre desde los dinosaurios hasta las aves.
Objetivo del estudio:
- Reevaluar el papel ecológico y la locomoción de Archaeopteryx.
- Para probar la hipótesis de Archaeopteryx como un depredador cursorial frente a un pájaro arbóreo.
Principales métodos:
- Análisis comparativo de la curvatura de las garras en las aves modernas (que viven en el suelo, en los árboles, trepan por el tronco).
- Examen de la geometría de las garras de Archaeopteryx (pes y manus).
Principales resultados:
- La curvatura de las garras distingue de manera fiable entre las aves que viven en el suelo y las que viven en los árboles.
- La curvatura de las garras de Archaeopteryx es consistente con las conductas de posarse y escalar el tronco.
- Las garras de los pies traseros se asemejan a las de las aves posadas, mientras que las garras de las manos son similares a las de los trepadores de troncos.
Conclusiones:
- Archaeopteryx fue probablemente un ave arbórea, posada en el árbol.
- Los hallazgos desafían la visión largamente sostenida de Archaeopteryx como un depredador cursorial.
- Esto sugiere una etapa terrestre diferente en la evolución aviar temprana.
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