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El registro fósil del Viejo Mundo de colibríes de tipo moderno
1Forschungsinstitut Senckenberg, Division of Ornithology, Senckenberganlage 25, D-60325 Frankfurt a.M., Germany. Gerald.Mayr@senckenberg.de
Science (New York, N.Y.)
|May 8, 2004
Resumen
Los esqueletos fósiles revelan que los primeros colibríes, especializados en el nectarivoro y el sobrevuelo, existieron en el Viejo Mundo durante el Oligoceno temprano. Este hallazgo hace retroceder los orígenes de la evolución moderna de los colibríes y la coevolución de aves y flores.
Área de la Ciencia:
- Paleontología Paleontología.
- Biología evolutiva Biología evolutiva.
- Paleoecología Paleoecología.
Sus antecedentes:
- Los fósiles de colibríes son raros, y la mayoría se conocen del Nuevo Mundo.
- La historia evolutiva y la distribución geográfica de los primeros colibríes aún no se entienden completamente.
Objetivo del estudio:
- Para informar sobre el descubrimiento de los fósiles más antiguos conocidos de colibríes de tipo moderno.
- Para investigar la evolución temprana y la paleobiogeografía de los colibríes.
- Explorar las implicaciones para las primeras interacciones ave-flor.
Principales métodos:
- Excavación de fósiles y análisis de pequeños esqueletos.
- Comparación morfológica con colibríes existentes y fósiles.
- La reconstrucción paleogeográfica. reconstrucción paleogeográfica.
Principales resultados:
- Descubrimiento de fósiles de colibríes del grupo madre del Oligoceno temprano en Alemania.
- Los fósiles muestran características modernas, incluidas especializaciones para el nectarivoro y el vuelo flotante.
- Estos son los fósiles más antiguos de colibríes de tipo moderno y los primeros reportados del Viejo Mundo.
Conclusiones:
- La evolución temprana del colibrí no se limitó al Nuevo Mundo.
- Los hallazgos sugieren que la coevolución de aves y flores (ornitófilia) se remonta a principios del Oligoceno.
- Este descubrimiento proporciona nuevos conocimientos sobre los orígenes de la ornitophilia en la flora del Viejo Mundo.
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