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Published on: November 14, 2013
Los procesos de crecimiento en los dientes distinguen a los humanos modernos del Homo erectus y de los homínidos
1Evolutionary Anatomy Unit, Department of Anatomy and Developmental Biology, University College London, Gower Street, London WC1E 6BT, UK. ucgacrd@ucl.ac.uk
Nature
|December 12, 2001
Resumen
Los primeros antepasados humanos, incluido el Homo erectus, no exhibieron el desarrollo dental moderno. Sus tasas de crecimiento del esmalte, a diferencia de las de los humanos modernos, se parecían más a las de los simios, lo que sugiere que el desarrollo dental moderno evolucionó más tarde en la evolución humana.
Área de la Ciencia:
- La paleoantropología es la paleoantropología.
- Biología evolutiva Biología evolutiva.
- Antropología dental Antropología dental.
Sus antecedentes:
- Los patrones de desarrollo dental son indicadores cruciales de la historia de la vida y la evolución en el género Homo.
- El desarrollo dental humano moderno se caracteriza por una trayectoria de crecimiento lento del esmalte, estrechamente relacionado con otros rasgos de la historia de la vida.
Objetivo del estudio:
- Para investigar los patrones de desarrollo dental de los primeros homínidos, específicamente los primeros Homo y australopites.
- Comparar las tasas de formación de esmalte y los tiempos de formación de dientes de los homínidos fósiles con los de los humanos y simios modernos.
Principales métodos:
- Análisis de las marcas incrementales diarias en el esmalte de homínidos fósiles para determinar las tasas de formación de esmalte.
- Reconstrucción de los tiempos de formación de los dientes basados en datos de crecimiento del esmalte de varios especímenes fósiles.
Principales resultados:
- Los primeros Homo y australopites mostraron trayectorias de crecimiento del esmalte similares a los simios africanos modernos y fósiles, no a los humanos modernos.
- Los tiempos de formación de los dientes en los australopitas y el Homo erectus fueron más cortos que los observados en los humanos modernos.
Conclusiones:
- Los primeros fósiles atribuidos al Homo no muestran el desarrollo dental de los humanos modernos.
- El desarrollo dental verdaderamente moderno probablemente surgió tarde en la línea de tiempo evolutiva humana.
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