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Un cráneo antropoide del Mioceno temprano de los Andes chilenos
J J Flynn1, A R Wyss, R Charrier
1Department of Geology, Field Museum, Chicago, Illinois 60605.
Nature
|February 16, 1995
Resumen
Un raro y completo cráneo de mono fósil de Chile.
Área de la Ciencia:
- Paleontología Paleontología.
- Evolución de los Primates Evolución de los Primates
- La biogeografía neotrópica es una biogeografía neotrópica.
Sus antecedentes:
- Las relaciones evolutivas de los primates, particularmente para los monos del Nuevo Mundo (platirrinos), son poco conocidas debido a la limitada evidencia fósil.
- Los análisis filogenéticos existentes ofrecen un marco para comprender las relaciones entre los primates antropoides.
Objetivo del estudio:
- Para informar sobre el descubrimiento de un cráneo de platirrina fósil significativo de los Andes chilenos.
- Utilizar este hallazgo para revisar la comprensión de las interrelaciones entre platirrinos y sus orígenes evolutivos.
Principales métodos:
- Descubrimiento y excavación de un cráneo de primate fósil completo de depósitos volcaniclásticos andinos.
- Datación radiométrica (40Ar/39Ar) para establecer la edad del fósil.
- Integración de los datos fósiles con los análisis filogenéticos existentes de los primates antropoides.
Principales resultados:
- Descubrimiento del cráneo de primate terciario mejor conservado de América del Sur, fechado en el Mioceno temprano.
- Este hallazgo proporciona evidencia crítica para reconstruir el morfotipo ancestral de la platirrina.
- Sugiere un potencial origen africano para los monos del Nuevo Mundo, desafiando las hipótesis anteriores.
Conclusiones:
- El descubrimiento pone de relieve el potencial de los depósitos andinos para descubrir la historia evolutiva de los primates.
- Este fósil tiene la capacidad de revisar sustancialmente nuestra comprensión de los orígenes y la diversificación de los platirrinos.
- Proporciona el primer registro de mamíferos sudamericanos de la edad del Mioceno Temprano fuera de la Patagonia argentina.
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