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Using a Comparative Species Approach to Investigate the Neurobiology of Paternal Responses
Published on: September 19, 2011
Paleontología: cuidado parental en un dinosaurio ornitisquiano
Qingjin Meng1, Jinyuan Liu, David J Varricchio
1Dalian Natural History Museum, 40 Xicun Street, Heishijiao, Shahekou, Dalian, China.
Nature
|September 10, 2004
Resumen
La evidencia fósil sugiere que los dinosaurios exhibieron cuidado parental. Un fósil de Psittacosaurus muestra un adulto con 34 juveniles, lo que indica el cuidado posterior a la eclosión en Dinosauria.
Área de la Ciencia:
- Paleontología Paleontología.
- Biología evolutiva Biología evolutiva.
- Zoología de los vertebrados Zoología de los vertebrados.
Sus antecedentes:
- El cuidado parental se observa en los arcosaurios vivos como los cocodrilos y las aves.
- Los orígenes evolutivos del cuidado parental en los archosaurios extintos, particularmente los dinosaurios, siguen siendo en gran medida desconocidos.
- La evidencia fósil del cuidado parental de los dinosaurios es escasa, lo que dificulta la comprensión evolutiva.
Objetivo del estudio:
- Para investigar la presencia y la naturaleza del cuidado parental en dinosaurios extintos.
- Para proporcionar evidencia fósil que apoye o refuta los comportamientos de cuidado parental en Dinosauria.
- Contribuir a la comprensión de la evolución del cuidado parental dentro de Archosauria.
Principales métodos:
- Análisis de un espécimen fósil (Museo de Historia Natural de Dalian D2156) de Psittacosaurus sp. que fue hallado en el Museo de Historia Natural de Dalian.
- Examen detallado de la relación espacial entre un solo adulto y múltiples juveniles en el fósil.
- Evaluación paleontológica del contexto de preservación para inferir el comportamiento.
Principales resultados:
- Un espécimen fósil notable conserva un solo Psittacosaurus adulto agrupado con 34 juveniles.
- La proximidad del adulto y numerosos juveniles dentro de un área pequeña sugiere un grupo cohesionado.
- Este arreglo proporciona una fuerte evidencia para el cuidado parental posterior a la eclosión en esta especie de dinosaurio.
Conclusiones:
- El fósil de Psittacosaurus ofrece evidencia convincente para el cuidado parental después de la eclosión en los dinosaurios.
- Este hallazgo sugiere que el cuidado parental puede haber estado más extendido en Dinosauria de lo que se pensaba anteriormente.
- Comprender el cuidado parental de los dinosaurios proporciona información sobre la evolución de los comportamientos sociales en reptiles extintos y su relación con las aves modernas.
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