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Los restos mandibulares apoyan la validez taxonómica del Australopithecus sediba
Darryl J de Ruiter1, Thomas J DeWitt, Keely B Carlson
1Department of Anthropology, Texas A&M University, College Station, TX 77843, USA. deruiter@tamu.edu
Science (New York, N.Y.)
|April 13, 2013
Resumen
Los fósiles de Malapa, Australopithecus sediba, son una especie distinta, no sólo una variación del Australopithecus africanus. El análisis de la mandíbula confirma el tamaño, la forma y los patrones de crecimiento únicos que diferencian a estos primeros antepasados humanos.
Área de la Ciencia:
- La paleoantropología es la paleoantropología.
- Evolución del ser humano Evolución del ser humano
- La primatología es la primatología.
Sus antecedentes:
- La clasificación de Australopithecus sediba, descubierto en el sitio Malapa, sigue siendo objeto de debate.
- Las preguntas clave se refieren a si Au. sediba representa una especie distinta o una variación intraspecífica dentro del Australopithecus africanus.
- La proximidad temporal y geográfica de Au. sediba hacia Au. Africanus requiere un análisis comparativo detallado.
Objetivo del estudio:
- Para investigar el estado taxonómico del Australopithecus sediba.
- Para determinar si la morfología mandibular de Au. sediba apoya su clasificación como una especie separada de Au. Africanus. africano. también conocido como africanus.
- Para analizar el tamaño, la forma y la trayectoria ontogenética de Au. Restos mandibulares de la Sediba, también conocidos como restos mandibulares.
Principales métodos:
- Análisis morfológico de fósiles mandibulares recientemente recuperados de Au. Sediba. se encuentra.
- Análisis comparativo de los restos mandibulares de Au. sediba y Au. Africanus hypodigms. también conocido como Africanus hypodigms.
- Examen de las pruebas craneofaciales, dentales y postcraneales para Au. Sediba. se encuentra.
Principales resultados:
- Morfología mandibular de Au. sediba es distinto de Au. sediba es distinto de Au. Africanus. africano. también conocido como africanus.
- Au. es decir. Sediba exhibe características únicas de tamaño y forma en su mandíbula.
- La trayectoria de crecimiento ontogenético de Au. Las mandíbulas de sediba difieren de las de Au. Africanus. africano. también conocido como africanus.
Conclusiones:
- La evidencia mandibular apoya la designación de Australopithecus sediba como un taxón válido y distinto.
- El Australopithecus sediba no es simplemente un morfo sobreviviente tardío del Australopithecus africanus.
- Las distintas características mandibulares, junto con otras evidencias esqueléticas, solidifican a Au. La posición evolutiva única de la Sediba.
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