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Edad de los primeros antropoides africanos más antiguos
Science (New York, N.Y.)
|December 5, 1986
Resumen
Los primeros fósiles de primates antropoides africanos (monos y simios) son más antiguos de lo que se pensaba, ya que datan de hace más de 31 millones de años a principios de la época del Oligoceno. Este hallazgo impacta nuestra comprensión de la evolución de los primates y la dispersión de los primeros mamíferos.
Área de la Ciencia:
- Paleontología Paleontología.
- Evolución de los Primates Evolución de los Primates
- La estratigrafía es la estratigrafía.
Sus antecedentes:
- La Formación Jebel Qatrani en la depresión Fayum de Egipto contiene el registro fósil más antiguo conocido de primates antropoides africanos (monos y simios).
- Las estimaciones anteriores colocaron la deposición de la formación más tarde de lo que se indica actualmente.
Objetivo del estudio:
- Reevaluar las evidencias geológicas y faunísticas de la Formación Jebel Qatrani.
- Para establecer una edad más precisa para los primeros primates antropoides africanos.
Principales métodos:
- Análisis geológico de la Formación Jebel Qatrani.
- Análisis de la fauna de la evidencia fósil dentro de la formación.
Principales resultados:
- La Formación Jebel Qatrani se depositó a principios de la época del Oligoceno, hace más de 31 millones de años.
- Esta datación revisada hace que los primates superiores africanos sean significativamente más viejos de lo estimado anteriormente.
- La morfología primitiva de estos primeros primates se alinea con su antiguo origen.
Conclusiones:
- Los primeros primates antropoides africanos son considerablemente más antiguos de lo que se creía anteriormente.
- Esta línea de tiempo revisada tiene implicaciones para comprender la evolución de los primates y la biogeografía.
- Los hallazgos sugieren que los primeros roedores histricomorfos de Fayum también son más viejos que sus contrapartes sudamericanas.
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